./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:26:08,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:26:08,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:26:08,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:26:08,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:26:08,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:26:08,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:26:08,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:26:08,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:26:08,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:26:08,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:26:08,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:26:08,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:26:08,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:26:08,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:26:08,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:26:08,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:26:08,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:26:08,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:26:08,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:26:08,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:26:08,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:26:08,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:26:08,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:26:08,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:26:08,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:26:08,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:26:08,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:26:08,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:26:08,314 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:26:08,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:26:08,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:26:08,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:26:08,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:26:08,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:26:08,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:26:08,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:26:08,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:26:08,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:26:08,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:26:08,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:26:08,321 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 17:26:08,338 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:26:08,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:26:08,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:26:08,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:26:08,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:26:08,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:26:08,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:26:08,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:26:08,340 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:26:08,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:26:08,340 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:26:08,340 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 17:26:08,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:26:08,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:26:08,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:26:08,341 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 17:26:08,341 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 17:26:08,341 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 17:26:08,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:26:08,341 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 17:26:08,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:26:08,341 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:26:08,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:26:08,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:26:08,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:26:08,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:26:08,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:26:08,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:26:08,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:26:08,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:26:08,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:26:08,343 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_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2021-12-06 17:26:08,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:26:08,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:26:08,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:26:08,547 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:26:08,548 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:26:08,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-12-06 17:26:08,597 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/data/f6665ce05/559f6b0c17294aec9e0933211e199472/FLAGc0e455b83 [2021-12-06 17:26:08,988 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:26:08,989 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-12-06 17:26:09,002 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/data/f6665ce05/559f6b0c17294aec9e0933211e199472/FLAGc0e455b83 [2021-12-06 17:26:09,349 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/data/f6665ce05/559f6b0c17294aec9e0933211e199472 [2021-12-06 17:26:09,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:26:09,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:26:09,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:26:09,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:26:09,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:26:09,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:26:09" (1/1) ... [2021-12-06 17:26:09,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@392c9620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:09, skipping insertion in model container [2021-12-06 17:26:09,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:26:09" (1/1) ... [2021-12-06 17:26:09,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:26:09,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:26:09,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:26:09,671 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-06 17:26:09,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4dc65343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:09, skipping insertion in model container [2021-12-06 17:26:09,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:26:09,672 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-06 17:26:09,673 INFO L158 Benchmark]: Toolchain (without parser) took 315.03ms. Allocated memory is still 109.1MB. Free memory was 69.8MB in the beginning and 78.9MB in the end (delta: -9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 17:26:09,673 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 109.1MB. Free memory is still 87.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:26:09,674 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.84ms. Allocated memory is still 109.1MB. Free memory was 69.5MB in the beginning and 78.9MB in the end (delta: -9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 17:26:09,675 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 109.1MB. Free memory is still 87.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 310.84ms. Allocated memory is still 109.1MB. Free memory was 69.5MB in the beginning and 78.9MB in the end (delta: -9.3MB). Peak memory consumption was 8.4MB. 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_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:26:11,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:26:11,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:26:11,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:26:11,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:26:11,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:26:11,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:26:11,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:26:11,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:26:11,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:26:11,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:26:11,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:26:11,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:26:11,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:26:11,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:26:11,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:26:11,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:26:11,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:26:11,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:26:11,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:26:11,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:26:11,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:26:11,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:26:11,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:26:11,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:26:11,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:26:11,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:26:11,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:26:11,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:26:11,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:26:11,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:26:11,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:26:11,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:26:11,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:26:11,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:26:11,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:26:11,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:26:11,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:26:11,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:26:11,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:26:11,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:26:11,208 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 17:26:11,227 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:26:11,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:26:11,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:26:11,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:26:11,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:26:11,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:26:11,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:26:11,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:26:11,229 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:26:11,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:26:11,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:26:11,230 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 17:26:11,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:26:11,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:26:11,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:26:11,230 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 17:26:11,230 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 17:26:11,230 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 17:26:11,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:26:11,231 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 17:26:11,231 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 17:26:11,231 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 17:26:11,231 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:26:11,231 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:26:11,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:26:11,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:26:11,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:26:11,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:26:11,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:26:11,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:26:11,232 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 17:26:11,232 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 17:26:11,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:26:11,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 17:26:11,233 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_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2021-12-06 17:26:11,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:26:11,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:26:11,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:26:11,498 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:26:11,499 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:26:11,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-12-06 17:26:11,550 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/data/06607e3b6/6f391f63cd874f01862217851777666c/FLAGebac20323 [2021-12-06 17:26:11,939 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:26:11,940 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-12-06 17:26:11,953 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/data/06607e3b6/6f391f63cd874f01862217851777666c/FLAGebac20323 [2021-12-06 17:26:12,280 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/data/06607e3b6/6f391f63cd874f01862217851777666c [2021-12-06 17:26:12,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:26:12,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:26:12,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:26:12,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:26:12,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:26:12,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:26:12" (1/1) ... [2021-12-06 17:26:12,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e085c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:12, skipping insertion in model container [2021-12-06 17:26:12,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:26:12" (1/1) ... [2021-12-06 17:26:12,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:26:12,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:26:12,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:26:12,623 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-06 17:26:12,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:26:12,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:26:12,699 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:26:12,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:26:12,783 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:26:12,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:12 WrapperNode [2021-12-06 17:26:12,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:26:12,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:26:12,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:26:12,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:26:12,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:12" (1/1) ... [2021-12-06 17:26:12,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:12" (1/1) ... [2021-12-06 17:26:12,843 INFO L137 Inliner]: procedures = 179, calls = 145, calls flagged for inlining = 33, calls inlined = 20, statements flattened = 332 [2021-12-06 17:26:12,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:26:12,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:26:12,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:26:12,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:26:12,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:12" (1/1) ... [2021-12-06 17:26:12,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:12" (1/1) ... [2021-12-06 17:26:12,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:12" (1/1) ... [2021-12-06 17:26:12,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:12" (1/1) ... [2021-12-06 17:26:12,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:12" (1/1) ... [2021-12-06 17:26:12,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:12" (1/1) ... [2021-12-06 17:26:12,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:12" (1/1) ... [2021-12-06 17:26:12,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:26:12,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:26:12,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:26:12,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:26:12,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:12" (1/1) ... [2021-12-06 17:26:12,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:26:12,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:12,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:26:12,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:26:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-06 17:26:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-06 17:26:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-06 17:26:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-06 17:26:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-06 17:26:12,947 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-06 17:26:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2021-12-06 17:26:12,947 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2021-12-06 17:26:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-12-06 17:26:12,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-12-06 17:26:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-06 17:26:12,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-06 17:26:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-12-06 17:26:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-12-06 17:26:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 17:26:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:26:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2021-12-06 17:26:12,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2021-12-06 17:26:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:26:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 17:26:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-12-06 17:26:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 17:26:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-06 17:26:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:26:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 17:26:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-06 17:26:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-12-06 17:26:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:26:12,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:26:13,074 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:26:13,075 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:26:13,078 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 17:26:13,988 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:26:13,997 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:26:13,997 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 17:26:14,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:26:14 BoogieIcfgContainer [2021-12-06 17:26:14,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:26:14,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:26:14,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:26:14,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:26:14,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:26:12" (1/3) ... [2021-12-06 17:26:14,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b06669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:26:14, skipping insertion in model container [2021-12-06 17:26:14,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:12" (2/3) ... [2021-12-06 17:26:14,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b06669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:26:14, skipping insertion in model container [2021-12-06 17:26:14,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:26:14" (3/3) ... [2021-12-06 17:26:14,007 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test12-2.i [2021-12-06 17:26:14,013 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:26:14,013 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 124 error locations. [2021-12-06 17:26:14,045 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:26:14,050 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 17:26:14,051 INFO L340 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2021-12-06 17:26:14,065 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) [2021-12-06 17:26:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:26:14,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:14,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:14,072 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)] === [2021-12-06 17:26:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash -297378988, now seen corresponding path program 1 times [2021-12-06 17:26:14,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:14,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106131546] [2021-12-06 17:26:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:14,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:14,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:14,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:14,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 17:26:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:14,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:26:14,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:14,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:14,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:14,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106131546] [2021-12-06 17:26:14,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106131546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:14,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:14,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:26:14,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451293769] [2021-12-06 17:26:14,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:14,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:26:14,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:14,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:26:14,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:26:14,373 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 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-12-06 17:26:15,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:15,108 INFO L93 Difference]: Finished difference Result 412 states and 459 transitions. [2021-12-06 17:26:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:26:15,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2021-12-06 17:26:15,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:15,120 INFO L225 Difference]: With dead ends: 412 [2021-12-06 17:26:15,120 INFO L226 Difference]: Without dead ends: 408 [2021-12-06 17:26:15,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:15,123 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 299 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:15,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 522 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 17:26:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-06 17:26:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 344. [2021-12-06 17:26:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 200 states have (on average 1.83) internal successors, (366), 321 states have internal predecessors, (366), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2021-12-06 17:26:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 402 transitions. [2021-12-06 17:26:15,174 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 402 transitions. Word has length 11 [2021-12-06 17:26:15,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:15,175 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 402 transitions. [2021-12-06 17:26:15,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-12-06 17:26:15,175 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 402 transitions. [2021-12-06 17:26:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:26:15,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:15,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:15,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:26:15,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:15,378 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)] === [2021-12-06 17:26:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash -297378987, now seen corresponding path program 1 times [2021-12-06 17:26:15,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:15,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048769181] [2021-12-06 17:26:15,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:15,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:15,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:15,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:15,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 17:26:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:15,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:26:15,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:15,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:15,598 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:15,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048769181] [2021-12-06 17:26:15,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048769181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:15,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:15,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:26:15,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130332306] [2021-12-06 17:26:15,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:15,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:26:15,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:26:15,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:26:15,600 INFO L87 Difference]: Start difference. First operand 344 states and 402 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-12-06 17:26:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:16,487 INFO L93 Difference]: Finished difference Result 476 states and 564 transitions. [2021-12-06 17:26:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:26:16,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2021-12-06 17:26:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:16,491 INFO L225 Difference]: With dead ends: 476 [2021-12-06 17:26:16,491 INFO L226 Difference]: Without dead ends: 476 [2021-12-06 17:26:16,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:16,492 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 131 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:16,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 849 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:26:16,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-12-06 17:26:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 407. [2021-12-06 17:26:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 256 states have (on average 1.83203125) internal successors, (469), 376 states have internal predecessors, (469), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (29), 23 states have call predecessors, (29), 22 states have call successors, (29) [2021-12-06 17:26:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 520 transitions. [2021-12-06 17:26:16,513 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 520 transitions. Word has length 11 [2021-12-06 17:26:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:16,513 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 520 transitions. [2021-12-06 17:26:16,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-12-06 17:26:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 520 transitions. [2021-12-06 17:26:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:26:16,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:16,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:16,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 17:26:16,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:16,715 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)] === [2021-12-06 17:26:16,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1184882668, now seen corresponding path program 1 times [2021-12-06 17:26:16,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:16,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800534988] [2021-12-06 17:26:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:16,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:16,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:16,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:16,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 17:26:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:16,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:26:16,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:16,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:16,839 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:16,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800534988] [2021-12-06 17:26:16,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800534988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:16,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:16,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:26:16,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473885069] [2021-12-06 17:26:16,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:16,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:26:16,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:16,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:26:16,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:16,841 INFO L87 Difference]: Start difference. First operand 407 states and 520 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) [2021-12-06 17:26:16,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:16,955 INFO L93 Difference]: Finished difference Result 649 states and 797 transitions. [2021-12-06 17:26:16,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:26:16,956 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 [2021-12-06 17:26:16,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:16,960 INFO L225 Difference]: With dead ends: 649 [2021-12-06 17:26:16,960 INFO L226 Difference]: Without dead ends: 649 [2021-12-06 17:26:16,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:16,961 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 [2021-12-06 17:26:16,961 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] [2021-12-06 17:26:16,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-06 17:26:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 392. [2021-12-06 17:26:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 241 states have (on average 1.8215767634854771) internal successors, (439), 362 states have internal predecessors, (439), 21 states have call successors, (21), 9 states have call predecessors, (21), 10 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2021-12-06 17:26:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 494 transitions. [2021-12-06 17:26:16,980 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 494 transitions. Word has length 11 [2021-12-06 17:26:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:16,980 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 494 transitions. [2021-12-06 17:26:16,980 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) [2021-12-06 17:26:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 494 transitions. [2021-12-06 17:26:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 17:26:16,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:16,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:16,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 17:26:17,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:17,182 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)] === [2021-12-06 17:26:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:17,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613461, now seen corresponding path program 1 times [2021-12-06 17:26:17,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:17,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065964371] [2021-12-06 17:26:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:17,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:17,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:17,189 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:17,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 17:26:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:17,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:26:17,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:17,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:26:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:17,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:17,409 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:17,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065964371] [2021-12-06 17:26:17,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065964371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:17,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:17,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:26:17,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364560816] [2021-12-06 17:26:17,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:17,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:26:17,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:17,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:26:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:26:17,411 INFO L87 Difference]: Start difference. First operand 392 states and 494 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-12-06 17:26:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:18,528 INFO L93 Difference]: Finished difference Result 436 states and 541 transitions. [2021-12-06 17:26:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:26:18,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2021-12-06 17:26:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:18,532 INFO L225 Difference]: With dead ends: 436 [2021-12-06 17:26:18,532 INFO L226 Difference]: Without dead ends: 436 [2021-12-06 17:26:18,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:26:18,533 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 59 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:18,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1152 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 17:26:18,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-12-06 17:26:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 404. [2021-12-06 17:26:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 250 states have (on average 1.804) internal successors, (451), 372 states have internal predecessors, (451), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2021-12-06 17:26:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 506 transitions. [2021-12-06 17:26:18,545 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 506 transitions. Word has length 13 [2021-12-06 17:26:18,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:18,545 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 506 transitions. [2021-12-06 17:26:18,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-12-06 17:26:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 506 transitions. [2021-12-06 17:26:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 17:26:18,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:18,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:18,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 17:26:18,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:18,748 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)] === [2021-12-06 17:26:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:18,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613462, now seen corresponding path program 1 times [2021-12-06 17:26:18,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:18,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970623404] [2021-12-06 17:26:18,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:18,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:18,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:18,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:18,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 17:26:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:18,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:26:18,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:19,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:26:19,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:26:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:19,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:19,080 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:19,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970623404] [2021-12-06 17:26:19,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970623404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:19,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:19,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:26:19,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370886724] [2021-12-06 17:26:19,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:19,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:26:19,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:19,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:26:19,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:26:19,082 INFO L87 Difference]: Start difference. First operand 404 states and 506 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-12-06 17:26:20,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:20,092 INFO L93 Difference]: Finished difference Result 424 states and 522 transitions. [2021-12-06 17:26:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:26:20,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2021-12-06 17:26:20,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:20,096 INFO L225 Difference]: With dead ends: 424 [2021-12-06 17:26:20,096 INFO L226 Difference]: Without dead ends: 424 [2021-12-06 17:26:20,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:26:20,097 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 33 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:20,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1292 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:26:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-06 17:26:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 413. [2021-12-06 17:26:20,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 259 states have (on average 1.7915057915057915) internal successors, (464), 381 states have internal predecessors, (464), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2021-12-06 17:26:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 519 transitions. [2021-12-06 17:26:20,108 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 519 transitions. Word has length 13 [2021-12-06 17:26:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:20,108 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 519 transitions. [2021-12-06 17:26:20,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-12-06 17:26:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 519 transitions. [2021-12-06 17:26:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 17:26:20,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:20,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:20,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 17:26:20,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:20,311 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)] === [2021-12-06 17:26:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:20,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1895308392, now seen corresponding path program 1 times [2021-12-06 17:26:20,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:20,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487363036] [2021-12-06 17:26:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:20,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:20,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:20,314 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:20,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 17:26:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:20,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:26:20,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:20,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:20,433 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:20,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487363036] [2021-12-06 17:26:20,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487363036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:20,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:20,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:26:20,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507981844] [2021-12-06 17:26:20,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:20,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:26:20,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:20,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:26:20,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:20,435 INFO L87 Difference]: Start difference. First operand 413 states and 519 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) [2021-12-06 17:26:20,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:20,483 INFO L93 Difference]: Finished difference Result 351 states and 397 transitions. [2021-12-06 17:26:20,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:26:20,483 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 [2021-12-06 17:26:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:20,485 INFO L225 Difference]: With dead ends: 351 [2021-12-06 17:26:20,485 INFO L226 Difference]: Without dead ends: 351 [2021-12-06 17:26:20,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:20,486 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 10 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:20,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1350 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:26:20,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-12-06 17:26:20,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 345. [2021-12-06 17:26:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 199 states have (on average 1.7688442211055277) internal successors, (352), 320 states have internal predecessors, (352), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:26:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 387 transitions. [2021-12-06 17:26:20,494 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 387 transitions. Word has length 17 [2021-12-06 17:26:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:20,494 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 387 transitions. [2021-12-06 17:26:20,494 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) [2021-12-06 17:26:20,494 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 387 transitions. [2021-12-06 17:26:20,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 17:26:20,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:20,495 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:20,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 17:26:20,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:20,697 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)] === [2021-12-06 17:26:20,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:20,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2106255897, now seen corresponding path program 1 times [2021-12-06 17:26:20,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:20,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742295745] [2021-12-06 17:26:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:20,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:20,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:20,703 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:20,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 17:26:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:20,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:26:20,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:26:20,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:26:20,898 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:20,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742295745] [2021-12-06 17:26:20,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742295745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:26:20,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:26:20,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-06 17:26:20,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387253896] [2021-12-06 17:26:20,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:26:20,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:26:20,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:20,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:26:20,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:20,900 INFO L87 Difference]: Start difference. First operand 345 states and 387 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) [2021-12-06 17:26:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:20,945 INFO L93 Difference]: Finished difference Result 344 states and 386 transitions. [2021-12-06 17:26:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:26:20,945 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 [2021-12-06 17:26:20,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:20,947 INFO L225 Difference]: With dead ends: 344 [2021-12-06 17:26:20,947 INFO L226 Difference]: Without dead ends: 344 [2021-12-06 17:26:20,947 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 [2021-12-06 17:26:20,948 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 256 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:20,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 1060 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:26:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-12-06 17:26:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2021-12-06 17:26:20,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 199 states have (on average 1.763819095477387) internal successors, (351), 319 states have internal predecessors, (351), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:26:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 386 transitions. [2021-12-06 17:26:20,955 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 386 transitions. Word has length 17 [2021-12-06 17:26:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:20,955 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 386 transitions. [2021-12-06 17:26:20,955 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) [2021-12-06 17:26:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 386 transitions. [2021-12-06 17:26:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 17:26:20,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:20,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:20,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 17:26:21,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:21,158 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)] === [2021-12-06 17:26:21,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:21,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2106256148, now seen corresponding path program 1 times [2021-12-06 17:26:21,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:21,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495271055] [2021-12-06 17:26:21,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:21,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:21,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:21,163 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:21,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 17:26:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:21,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:26:21,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:26:21,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:21,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:21,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495271055] [2021-12-06 17:26:21,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495271055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:21,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:21,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:26:21,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923299448] [2021-12-06 17:26:21,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:21,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:26:21,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:21,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:26:21,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:21,278 INFO L87 Difference]: Start difference. First operand 344 states and 386 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) [2021-12-06 17:26:21,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:21,308 INFO L93 Difference]: Finished difference Result 388 states and 436 transitions. [2021-12-06 17:26:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:26:21,308 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 [2021-12-06 17:26:21,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:21,310 INFO L225 Difference]: With dead ends: 388 [2021-12-06 17:26:21,310 INFO L226 Difference]: Without dead ends: 388 [2021-12-06 17:26:21,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:21,311 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 [2021-12-06 17:26:21,311 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] [2021-12-06 17:26:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-12-06 17:26:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 346. [2021-12-06 17:26:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 201 states have (on average 1.756218905472637) internal successors, (353), 320 states have internal predecessors, (353), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:26:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 388 transitions. [2021-12-06 17:26:21,319 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 388 transitions. Word has length 17 [2021-12-06 17:26:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:21,319 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 388 transitions. [2021-12-06 17:26:21,319 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) [2021-12-06 17:26:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 388 transitions. [2021-12-06 17:26:21,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 17:26:21,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:21,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:21,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 17:26:21,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:21,521 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)] === [2021-12-06 17:26:21,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:21,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885299, now seen corresponding path program 1 times [2021-12-06 17:26:21,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:21,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645905043] [2021-12-06 17:26:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:21,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:21,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:21,524 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:21,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 17:26:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:21,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:26:21,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:21,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:26:21,673 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:26:21,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-06 17:26:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:21,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:21,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:21,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645905043] [2021-12-06 17:26:21,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645905043] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:26:21,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:26:21,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-06 17:26:21,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015361829] [2021-12-06 17:26:21,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:26:21,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:26:21,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:21,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:26:21,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:26:21,837 INFO L87 Difference]: Start difference. First operand 346 states and 388 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:26:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:22,322 INFO L93 Difference]: Finished difference Result 353 states and 399 transitions. [2021-12-06 17:26:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:26:22,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2021-12-06 17:26:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:22,325 INFO L225 Difference]: With dead ends: 353 [2021-12-06 17:26:22,325 INFO L226 Difference]: Without dead ends: 353 [2021-12-06 17:26:22,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:26:22,325 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 20 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:22,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1183 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 416 Invalid, 0 Unknown, 163 Unchecked, 0.5s Time] [2021-12-06 17:26:22,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-06 17:26:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 350. [2021-12-06 17:26:22,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 205 states have (on average 1.7414634146341463) internal successors, (357), 324 states have internal predecessors, (357), 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) [2021-12-06 17:26:22,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 392 transitions. [2021-12-06 17:26:22,333 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 392 transitions. Word has length 17 [2021-12-06 17:26:22,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:22,333 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 392 transitions. [2021-12-06 17:26:22,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:26:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 392 transitions. [2021-12-06 17:26:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 17:26:22,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:22,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:22,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 17:26:22,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:22,535 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)] === [2021-12-06 17:26:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:22,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885298, now seen corresponding path program 1 times [2021-12-06 17:26:22,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:22,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204805631] [2021-12-06 17:26:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:22,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:22,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:22,536 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:22,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 17:26:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:22,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:26:22,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:22,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:26:22,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:26:24,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:26:24,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:26:24,748 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:26:24,748 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 23 treesize of output 23 [2021-12-06 17:26:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:24,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:25,002 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:25,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204805631] [2021-12-06 17:26:25,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204805631] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:26:25,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1949086085] [2021-12-06 17:26:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:25,003 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:26:25,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:26:25,004 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:26:25,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-12-06 17:26:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:25,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:26:25,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:25,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:26:25,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:26:25,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:26:25,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:26:25,201 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:26:25,201 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 [2021-12-06 17:26:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:25,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:25,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1949086085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:26:25,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:26:25,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-12-06 17:26:25,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960639922] [2021-12-06 17:26:25,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:26:25,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:26:25,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:25,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:26:25,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2021-12-06 17:26:25,377 INFO L87 Difference]: Start difference. First operand 350 states and 392 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-12-06 17:26:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:27,878 INFO L93 Difference]: Finished difference Result 634 states and 720 transitions. [2021-12-06 17:26:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:26:27,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 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 [2021-12-06 17:26:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:27,882 INFO L225 Difference]: With dead ends: 634 [2021-12-06 17:26:27,882 INFO L226 Difference]: Without dead ends: 634 [2021-12-06 17:26:27,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=32, Invalid=123, Unknown=1, NotChecked=0, Total=156 [2021-12-06 17:26:27,883 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 328 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:27,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 1305 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1390 Invalid, 0 Unknown, 319 Unchecked, 2.4s Time] [2021-12-06 17:26:27,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-06 17:26:27,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 364. [2021-12-06 17:26:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 216 states have (on average 1.7222222222222223) internal successors, (372), 335 states have internal predecessors, (372), 18 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2021-12-06 17:26:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 420 transitions. [2021-12-06 17:26:27,892 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 420 transitions. Word has length 17 [2021-12-06 17:26:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:27,892 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 420 transitions. [2021-12-06 17:26:27,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-12-06 17:26:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 420 transitions. [2021-12-06 17:26:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:26:27,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:27,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:27,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-12-06 17:26:28,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 17:26:28,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:28,294 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)] === [2021-12-06 17:26:28,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:28,296 INFO L85 PathProgramCache]: Analyzing trace with hash -869422937, now seen corresponding path program 1 times [2021-12-06 17:26:28,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:28,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275415463] [2021-12-06 17:26:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:28,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:28,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:28,298 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:28,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 17:26:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:28,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:26:28,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:28,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:26:28,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:28,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275415463] [2021-12-06 17:26:28,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275415463] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:26:28,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:26:28,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-06 17:26:28,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068913434] [2021-12-06 17:26:28,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:26:28,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:26:28,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:28,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:26:28,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:26:28,566 INFO L87 Difference]: Start difference. First operand 364 states and 420 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) [2021-12-06 17:26:28,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:28,930 INFO L93 Difference]: Finished difference Result 367 states and 421 transitions. [2021-12-06 17:26:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:26:28,931 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 [2021-12-06 17:26:28,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:28,933 INFO L225 Difference]: With dead ends: 367 [2021-12-06 17:26:28,933 INFO L226 Difference]: Without dead ends: 367 [2021-12-06 17:26:28,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:26:28,934 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 578 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:28,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 1332 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 319 Invalid, 0 Unknown, 27 Unchecked, 0.3s Time] [2021-12-06 17:26:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-06 17:26:28,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 363. [2021-12-06 17:26:28,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 216 states have (on average 1.712962962962963) internal successors, (370), 334 states have internal predecessors, (370), 18 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2021-12-06 17:26:28,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 418 transitions. [2021-12-06 17:26:28,941 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 418 transitions. Word has length 18 [2021-12-06 17:26:28,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:28,941 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 418 transitions. [2021-12-06 17:26:28,941 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) [2021-12-06 17:26:28,941 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 418 transitions. [2021-12-06 17:26:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:26:28,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:28,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:28,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 17:26:29,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:29,143 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)] === [2021-12-06 17:26:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:29,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1883109288, now seen corresponding path program 1 times [2021-12-06 17:26:29,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:29,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707866718] [2021-12-06 17:26:29,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:29,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:29,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:29,148 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:29,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 17:26:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:29,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:26:29,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:29,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:29,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:29,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707866718] [2021-12-06 17:26:29,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707866718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:29,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:29,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:26:29,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608158242] [2021-12-06 17:26:29,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:29,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:26:29,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:29,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:26:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:26:29,278 INFO L87 Difference]: Start difference. First operand 363 states and 418 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) [2021-12-06 17:26:29,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:29,792 INFO L93 Difference]: Finished difference Result 366 states and 420 transitions. [2021-12-06 17:26:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:26:29,793 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 [2021-12-06 17:26:29,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:29,795 INFO L225 Difference]: With dead ends: 366 [2021-12-06 17:26:29,795 INFO L226 Difference]: Without dead ends: 353 [2021-12-06 17:26:29,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:26:29,795 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 41 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:29,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 679 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:26:29,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-06 17:26:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2021-12-06 17:26:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 207 states have (on average 1.7391304347826086) internal successors, (360), 325 states have internal predecessors, (360), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2021-12-06 17:26:29,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 407 transitions. [2021-12-06 17:26:29,802 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 407 transitions. Word has length 18 [2021-12-06 17:26:29,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:29,802 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 407 transitions. [2021-12-06 17:26:29,802 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) [2021-12-06 17:26:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 407 transitions. [2021-12-06 17:26:29,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 17:26:29,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:29,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:29,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 17:26:30,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:30,004 INFO L402 AbstractCegarLoop]: === Iteration 13 === 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)] === [2021-12-06 17:26:30,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:30,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475052, now seen corresponding path program 1 times [2021-12-06 17:26:30,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:30,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956933317] [2021-12-06 17:26:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:30,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:30,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:30,009 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:30,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 17:26:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:30,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 17:26:30,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:30,228 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:26:30,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 17:26:30,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-06 17:26:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:26:30,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:30,412 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:30,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956933317] [2021-12-06 17:26:30,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956933317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:26:30,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [458221136] [2021-12-06 17:26:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:30,413 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:26:30,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:26:30,414 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:26:30,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-06 17:26:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:30,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:26:30,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:30,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:26:30,573 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:26:30,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-06 17:26:30,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:26:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:26:30,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:30,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [458221136] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:26:30,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:26:30,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-12-06 17:26:30,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282738612] [2021-12-06 17:26:30,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:26:30,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:26:30,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:30,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:26:30,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:26:30,727 INFO L87 Difference]: Start difference. First operand 353 states and 407 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-12-06 17:26:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:31,284 INFO L93 Difference]: Finished difference Result 403 states and 459 transitions. [2021-12-06 17:26:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:26:31,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 21 [2021-12-06 17:26:31,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:31,287 INFO L225 Difference]: With dead ends: 403 [2021-12-06 17:26:31,287 INFO L226 Difference]: Without dead ends: 403 [2021-12-06 17:26:31,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:26:31,288 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 63 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:31,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 947 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 293 Invalid, 0 Unknown, 237 Unchecked, 0.5s Time] [2021-12-06 17:26:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-12-06 17:26:31,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 358. [2021-12-06 17:26:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 212 states have (on average 1.7264150943396226) internal successors, (366), 330 states have internal predecessors, (366), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2021-12-06 17:26:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 413 transitions. [2021-12-06 17:26:31,295 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 413 transitions. Word has length 21 [2021-12-06 17:26:31,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:31,295 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 413 transitions. [2021-12-06 17:26:31,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-12-06 17:26:31,295 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 413 transitions. [2021-12-06 17:26:31,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 17:26:31,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:31,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:31,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-12-06 17:26:31,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 17:26:31,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:31,697 INFO L402 AbstractCegarLoop]: === Iteration 14 === 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)] === [2021-12-06 17:26:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:31,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475053, now seen corresponding path program 1 times [2021-12-06 17:26:31,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:31,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622497897] [2021-12-06 17:26:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:31,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:31,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:31,702 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:31,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 17:26:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:31,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:26:31,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:33,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:26:33,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:26:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:35,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:36,297 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:36,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622497897] [2021-12-06 17:26:36,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622497897] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:26:36,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [84340264] [2021-12-06 17:26:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:36,298 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:26:36,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:26:36,298 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:26:36,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-12-06 17:26:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:36,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:26:36,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:36,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:26:38,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:26:38,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:26:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:38,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:38,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [84340264] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:26:38,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:26:38,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-12-06 17:26:38,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305523610] [2021-12-06 17:26:38,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:26:38,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:26:38,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:26:38,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=61, Unknown=2, NotChecked=0, Total=90 [2021-12-06 17:26:38,797 INFO L87 Difference]: Start difference. First operand 358 states and 413 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 17:26:43,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:43,780 INFO L93 Difference]: Finished difference Result 449 states and 506 transitions. [2021-12-06 17:26:43,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:26:43,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-12-06 17:26:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:43,782 INFO L225 Difference]: With dead ends: 449 [2021-12-06 17:26:43,782 INFO L226 Difference]: Without dead ends: 449 [2021-12-06 17:26:43,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=60, Invalid=118, Unknown=4, NotChecked=0, Total=182 [2021-12-06 17:26:43,783 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 151 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:43,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1095 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 499 Invalid, 0 Unknown, 205 Unchecked, 0.9s Time] [2021-12-06 17:26:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-12-06 17:26:43,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 384. [2021-12-06 17:26:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 236 states have (on average 1.7415254237288136) internal successors, (411), 354 states have internal predecessors, (411), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2021-12-06 17:26:43,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 460 transitions. [2021-12-06 17:26:43,791 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 460 transitions. Word has length 21 [2021-12-06 17:26:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:43,791 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 460 transitions. [2021-12-06 17:26:43,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 17:26:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 460 transitions. [2021-12-06 17:26:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 17:26:43,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:43,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:43,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-12-06 17:26:44,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 17:26:44,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:44,193 INFO L402 AbstractCegarLoop]: === Iteration 15 === 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)] === [2021-12-06 17:26:44,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:44,194 INFO L85 PathProgramCache]: Analyzing trace with hash -2128978739, now seen corresponding path program 1 times [2021-12-06 17:26:44,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:44,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748375068] [2021-12-06 17:26:44,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:44,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:44,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:44,198 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:44,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 17:26:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:44,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:26:44,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:26:44,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:44,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:44,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748375068] [2021-12-06 17:26:44,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748375068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:44,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:44,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:26:44,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828291751] [2021-12-06 17:26:44,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:44,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:26:44,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:44,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:26:44,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:44,269 INFO L87 Difference]: Start difference. First operand 384 states and 460 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-12-06 17:26:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:44,306 INFO L93 Difference]: Finished difference Result 397 states and 459 transitions. [2021-12-06 17:26:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:26:44,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 21 [2021-12-06 17:26:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:44,308 INFO L225 Difference]: With dead ends: 397 [2021-12-06 17:26:44,308 INFO L226 Difference]: Without dead ends: 397 [2021-12-06 17:26:44,308 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 [2021-12-06 17:26:44,309 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 252 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1230 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 [2021-12-06 17:26:44,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1230 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:26:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-06 17:26:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 381. [2021-12-06 17:26:44,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.7467811158798283) internal successors, (407), 351 states have internal predecessors, (407), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2021-12-06 17:26:44,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 456 transitions. [2021-12-06 17:26:44,316 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 456 transitions. Word has length 21 [2021-12-06 17:26:44,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:44,316 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 456 transitions. [2021-12-06 17:26:44,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-12-06 17:26:44,316 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 456 transitions. [2021-12-06 17:26:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 17:26:44,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:44,317 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] [2021-12-06 17:26:44,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-06 17:26:44,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:44,518 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)] === [2021-12-06 17:26:44,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:44,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040467, now seen corresponding path program 1 times [2021-12-06 17:26:44,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:44,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611454706] [2021-12-06 17:26:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:44,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:44,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:44,524 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:44,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 17:26:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:44,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:26:44,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:44,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:26:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:26:44,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:44,691 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:44,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611454706] [2021-12-06 17:26:44,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611454706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:44,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:44,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:26:44,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10054389] [2021-12-06 17:26:44,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:44,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:26:44,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:44,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:26:44,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:44,693 INFO L87 Difference]: Start difference. First operand 381 states and 456 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:26:45,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:45,308 INFO L93 Difference]: Finished difference Result 422 states and 500 transitions. [2021-12-06 17:26:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:26:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-12-06 17:26:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:45,311 INFO L225 Difference]: With dead ends: 422 [2021-12-06 17:26:45,311 INFO L226 Difference]: Without dead ends: 422 [2021-12-06 17:26:45,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:26:45,312 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 57 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:45,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1034 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:26:45,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-06 17:26:45,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 381. [2021-12-06 17:26:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.742489270386266) internal successors, (406), 351 states have internal predecessors, (406), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2021-12-06 17:26:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 455 transitions. [2021-12-06 17:26:45,319 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 455 transitions. Word has length 23 [2021-12-06 17:26:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:45,319 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 455 transitions. [2021-12-06 17:26:45,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:26:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 455 transitions. [2021-12-06 17:26:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 17:26:45,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:45,320 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] [2021-12-06 17:26:45,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-06 17:26:45,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:45,520 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)] === [2021-12-06 17:26:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:45,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040466, now seen corresponding path program 1 times [2021-12-06 17:26:45,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:45,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607061502] [2021-12-06 17:26:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:45,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:45,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:45,522 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:45,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 17:26:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:45,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:26:45,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:45,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:26:45,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:26:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:26:45,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:45,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:45,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607061502] [2021-12-06 17:26:45,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607061502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:45,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:45,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:26:45,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87355886] [2021-12-06 17:26:45,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:45,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:26:45,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:45,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:26:45,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:45,726 INFO L87 Difference]: Start difference. First operand 381 states and 455 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:26:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:46,539 INFO L93 Difference]: Finished difference Result 403 states and 477 transitions. [2021-12-06 17:26:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:26:46,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-12-06 17:26:46,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:46,543 INFO L225 Difference]: With dead ends: 403 [2021-12-06 17:26:46,543 INFO L226 Difference]: Without dead ends: 403 [2021-12-06 17:26:46,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:26:46,544 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 39 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:46,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 1085 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:26:46,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-12-06 17:26:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 381. [2021-12-06 17:26:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 233 states have (on average 1.738197424892704) internal successors, (405), 351 states have internal predecessors, (405), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2021-12-06 17:26:46,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 454 transitions. [2021-12-06 17:26:46,554 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 454 transitions. Word has length 23 [2021-12-06 17:26:46,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:46,554 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 454 transitions. [2021-12-06 17:26:46,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:26:46,554 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 454 transitions. [2021-12-06 17:26:46,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 17:26:46,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:46,555 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] [2021-12-06 17:26:46,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-06 17:26:46,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:46,756 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)] === [2021-12-06 17:26:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash -412937067, now seen corresponding path program 1 times [2021-12-06 17:26:46,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:46,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281297338] [2021-12-06 17:26:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:46,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:46,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:46,758 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:46,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 17:26:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:46,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:26:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:26:46,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:26:46,871 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:46,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281297338] [2021-12-06 17:26:46,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281297338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:26:46,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:26:46,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-06 17:26:46,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822003706] [2021-12-06 17:26:46,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:26:46,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:26:46,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:46,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:26:46,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:46,872 INFO L87 Difference]: Start difference. First operand 381 states and 454 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) [2021-12-06 17:26:46,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:46,899 INFO L93 Difference]: Finished difference Result 380 states and 453 transitions. [2021-12-06 17:26:46,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:26:46,899 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 [2021-12-06 17:26:46,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:46,901 INFO L225 Difference]: With dead ends: 380 [2021-12-06 17:26:46,901 INFO L226 Difference]: Without dead ends: 380 [2021-12-06 17:26:46,901 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 [2021-12-06 17:26:46,902 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 [2021-12-06 17:26:46,902 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] [2021-12-06 17:26:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-12-06 17:26:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2021-12-06 17:26:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 233 states have (on average 1.7339055793991416) internal successors, (404), 350 states have internal predecessors, (404), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (30), 21 states have call predecessors, (30), 19 states have call successors, (30) [2021-12-06 17:26:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 453 transitions. [2021-12-06 17:26:46,909 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 453 transitions. Word has length 25 [2021-12-06 17:26:46,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:46,909 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 453 transitions. [2021-12-06 17:26:46,909 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) [2021-12-06 17:26:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 453 transitions. [2021-12-06 17:26:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 17:26:46,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:46,909 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] [2021-12-06 17:26:46,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-06 17:26:47,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:47,110 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)] === [2021-12-06 17:26:47,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:47,110 INFO L85 PathProgramCache]: Analyzing trace with hash -412937301, now seen corresponding path program 1 times [2021-12-06 17:26:47,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:47,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552421714] [2021-12-06 17:26:47,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:47,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:47,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:47,111 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:47,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 17:26:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:47,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:26:47,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:26:47,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:47,197 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:47,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552421714] [2021-12-06 17:26:47,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552421714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:47,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:47,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:26:47,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457565981] [2021-12-06 17:26:47,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:47,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:26:47,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:26:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:47,198 INFO L87 Difference]: Start difference. First operand 380 states and 453 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) [2021-12-06 17:26:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:47,223 INFO L93 Difference]: Finished difference Result 415 states and 481 transitions. [2021-12-06 17:26:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:26:47,224 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 [2021-12-06 17:26:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:47,226 INFO L225 Difference]: With dead ends: 415 [2021-12-06 17:26:47,226 INFO L226 Difference]: Without dead ends: 415 [2021-12-06 17:26:47,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:47,226 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 [2021-12-06 17:26:47,227 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] [2021-12-06 17:26:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-12-06 17:26:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 371. [2021-12-06 17:26:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 226 states have (on average 1.7345132743362832) internal successors, (392), 343 states have internal predecessors, (392), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2021-12-06 17:26:47,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 435 transitions. [2021-12-06 17:26:47,233 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 435 transitions. Word has length 25 [2021-12-06 17:26:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:47,233 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 435 transitions. [2021-12-06 17:26:47,233 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) [2021-12-06 17:26:47,233 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 435 transitions. [2021-12-06 17:26:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 17:26:47,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:47,234 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:47,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-06 17:26:47,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:47,435 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)] === [2021-12-06 17:26:47,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:47,436 INFO L85 PathProgramCache]: Analyzing trace with hash -441566452, now seen corresponding path program 1 times [2021-12-06 17:26:47,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:47,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273776217] [2021-12-06 17:26:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:47,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:47,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:47,440 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:47,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 17:26:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:47,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:26:47,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:47,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:26:47,648 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 17:26:47,648 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 21 treesize of output 26 [2021-12-06 17:26:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:26:47,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:26:47,802 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:47,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273776217] [2021-12-06 17:26:47,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273776217] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:26:47,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:26:47,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-06 17:26:47,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214996626] [2021-12-06 17:26:47,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:26:47,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:26:47,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:47,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:26:47,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:26:47,804 INFO L87 Difference]: Start difference. First operand 371 states and 435 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) [2021-12-06 17:26:48,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:48,973 INFO L93 Difference]: Finished difference Result 515 states and 605 transitions. [2021-12-06 17:26:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:26:48,973 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 [2021-12-06 17:26:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:48,975 INFO L225 Difference]: With dead ends: 515 [2021-12-06 17:26:48,976 INFO L226 Difference]: Without dead ends: 515 [2021-12-06 17:26:48,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:26:48,976 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 182 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:48,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1304 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 733 Invalid, 0 Unknown, 223 Unchecked, 1.1s Time] [2021-12-06 17:26:48,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-12-06 17:26:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 373. [2021-12-06 17:26:48,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 229 states have (on average 1.724890829694323) internal successors, (395), 345 states have internal predecessors, (395), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2021-12-06 17:26:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 438 transitions. [2021-12-06 17:26:48,983 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 438 transitions. Word has length 25 [2021-12-06 17:26:48,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:48,983 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 438 transitions. [2021-12-06 17:26:48,983 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) [2021-12-06 17:26:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 438 transitions. [2021-12-06 17:26:48,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 17:26:48,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:48,983 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:48,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 17:26:49,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:26:49,184 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)] === [2021-12-06 17:26:49,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:49,184 INFO L85 PathProgramCache]: Analyzing trace with hash -441566451, now seen corresponding path program 1 times [2021-12-06 17:26:49,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:26:49,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650690746] [2021-12-06 17:26:49,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:49,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:26:49,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:26:49,186 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:26:49,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 17:26:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:49,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 17:26:49,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:49,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:26:53,398 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:26:53,398 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 [2021-12-06 17:26:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:26:53,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:53,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:26:53,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650690746] [2021-12-06 17:26:53,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650690746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:26:53,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1590224016] [2021-12-06 17:26:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:53,643 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:26:53,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:26:53,644 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:26:53,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-12-06 17:26:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:53,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:26:53,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:53,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:26:53,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:26:58,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:26:58,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:26:58,020 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:26:58,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 17:26:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:26:58,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:58,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1590224016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:26:58,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:26:58,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-06 17:26:58,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783697441] [2021-12-06 17:26:58,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:26:58,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 17:26:58,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:26:58,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 17:26:58,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=225, Unknown=4, NotChecked=0, Total=272 [2021-12-06 17:26:58,240 INFO L87 Difference]: Start difference. First operand 373 states and 438 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 17:27:03,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:03,610 INFO L93 Difference]: Finished difference Result 645 states and 746 transitions. [2021-12-06 17:27:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:27:03,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2021-12-06 17:27:03,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:03,613 INFO L225 Difference]: With dead ends: 645 [2021-12-06 17:27:03,613 INFO L226 Difference]: Without dead ends: 645 [2021-12-06 17:27:03,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=56, Invalid=281, Unknown=5, NotChecked=0, Total=342 [2021-12-06 17:27:03,614 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 507 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 2282 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:03,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 2282 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1691 Invalid, 0 Unknown, 547 Unchecked, 3.2s Time] [2021-12-06 17:27:03,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-12-06 17:27:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 372. [2021-12-06 17:27:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 229 states have (on average 1.720524017467249) internal successors, (394), 344 states have internal predecessors, (394), 17 states have call successors, (17), 10 states have call predecessors, (17), 13 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2021-12-06 17:27:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 437 transitions. [2021-12-06 17:27:03,621 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 437 transitions. Word has length 25 [2021-12-06 17:27:03,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:03,621 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 437 transitions. [2021-12-06 17:27:03,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 17:27:03,621 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 437 transitions. [2021-12-06 17:27:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 17:27:03,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:03,621 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] [2021-12-06 17:27:03,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-12-06 17:27:03,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-06 17:27:04,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:27:04,023 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)] === [2021-12-06 17:27:04,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:04,025 INFO L85 PathProgramCache]: Analyzing trace with hash 83853234, now seen corresponding path program 1 times [2021-12-06 17:27:04,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:27:04,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563921290] [2021-12-06 17:27:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:04,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:27:04,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:27:04,027 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:27:04,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 17:27:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:04,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:27:04,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:27:04,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:27:04,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:27:04,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563921290] [2021-12-06 17:27:04,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563921290] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:04,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:27:04,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-06 17:27:04,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497678906] [2021-12-06 17:27:04,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:04,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:27:04,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:27:04,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:27:04,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:27:04,398 INFO L87 Difference]: Start difference. First operand 372 states and 437 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) [2021-12-06 17:27:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:04,579 INFO L93 Difference]: Finished difference Result 606 states and 700 transitions. [2021-12-06 17:27:04,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:27:04,579 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 [2021-12-06 17:27:04,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:04,582 INFO L225 Difference]: With dead ends: 606 [2021-12-06 17:27:04,582 INFO L226 Difference]: Without dead ends: 606 [2021-12-06 17:27:04,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:27:04,582 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 324 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:04,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 2300 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 207 Unchecked, 0.2s Time] [2021-12-06 17:27:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-12-06 17:27:04,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 473. [2021-12-06 17:27:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 316 states have (on average 1.7563291139240507) internal successors, (555), 431 states have internal predecessors, (555), 27 states have call successors, (27), 16 states have call predecessors, (27), 20 states have return successors, (41), 29 states have call predecessors, (41), 27 states have call successors, (41) [2021-12-06 17:27:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 623 transitions. [2021-12-06 17:27:04,594 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 623 transitions. Word has length 26 [2021-12-06 17:27:04,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:04,594 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 623 transitions. [2021-12-06 17:27:04,594 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) [2021-12-06 17:27:04,594 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 623 transitions. [2021-12-06 17:27:04,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 17:27:04,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:04,595 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] [2021-12-06 17:27:04,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-06 17:27:04,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:27:04,796 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)] === [2021-12-06 17:27:04,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:04,797 INFO L85 PathProgramCache]: Analyzing trace with hash -366162574, now seen corresponding path program 1 times [2021-12-06 17:27:04,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:27:04,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063582274] [2021-12-06 17:27:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:04,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:27:04,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:27:04,800 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:27:04,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-06 17:27:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:04,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:27:04,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:05,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:27:05,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:27:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:27:05,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:27:05,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:27:05,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063582274] [2021-12-06 17:27:05,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063582274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:05,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:05,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:27:05,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776860963] [2021-12-06 17:27:05,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:05,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:27:05,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:27:05,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:27:05,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:27:05,143 INFO L87 Difference]: Start difference. First operand 473 states and 623 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, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:27:05,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:05,686 INFO L93 Difference]: Finished difference Result 455 states and 584 transitions. [2021-12-06 17:27:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:27:05,688 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, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-06 17:27:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:05,690 INFO L225 Difference]: With dead ends: 455 [2021-12-06 17:27:05,690 INFO L226 Difference]: Without dead ends: 455 [2021-12-06 17:27:05,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:27:05,691 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 12 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:05,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1250 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:27:05,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-06 17:27:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 451. [2021-12-06 17:27:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 296 states have (on average 1.739864864864865) internal successors, (515), 411 states have internal predecessors, (515), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (40), 28 states have call predecessors, (40), 26 states have call successors, (40) [2021-12-06 17:27:05,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 581 transitions. [2021-12-06 17:27:05,699 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 581 transitions. Word has length 26 [2021-12-06 17:27:05,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:05,699 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 581 transitions. [2021-12-06 17:27:05,699 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, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:27:05,699 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 581 transitions. [2021-12-06 17:27:05,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 17:27:05,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:05,700 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] [2021-12-06 17:27:05,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-06 17:27:05,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:27:05,901 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)] === [2021-12-06 17:27:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:05,902 INFO L85 PathProgramCache]: Analyzing trace with hash 305064464, now seen corresponding path program 1 times [2021-12-06 17:27:05,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:27:05,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531196168] [2021-12-06 17:27:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:05,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:27:05,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:27:05,912 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:27:05,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-06 17:27:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:06,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 17:27:06,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:27:06,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:10,353 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:27:10,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531196168] [2021-12-06 17:27:10,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531196168] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:10,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [122720975] [2021-12-06 17:27:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:10,354 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:27:10,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:27:10,355 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:27:10,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-12-06 17:27:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:10,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:27:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:27:10,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:14,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [122720975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:14,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:27:14,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-06 17:27:14,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378370372] [2021-12-06 17:27:14,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:14,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:27:14,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:27:14,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:27:14,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2021-12-06 17:27:14,788 INFO L87 Difference]: Start difference. First operand 451 states and 581 transitions. Second operand has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:27:15,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:15,627 INFO L93 Difference]: Finished difference Result 454 states and 583 transitions. [2021-12-06 17:27:15,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:27:15,627 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2021-12-06 17:27:15,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:15,629 INFO L225 Difference]: With dead ends: 454 [2021-12-06 17:27:15,629 INFO L226 Difference]: Without dead ends: 438 [2021-12-06 17:27:15,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2021-12-06 17:27:15,630 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 60 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 637 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:15,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1944 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 419 Invalid, 0 Unknown, 637 Unchecked, 0.8s Time] [2021-12-06 17:27:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-12-06 17:27:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2021-12-06 17:27:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 284 states have (on average 1.767605633802817) internal successors, (502), 399 states have internal predecessors, (502), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (39), 27 states have call predecessors, (39), 26 states have call successors, (39) [2021-12-06 17:27:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 567 transitions. [2021-12-06 17:27:15,637 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 567 transitions. Word has length 28 [2021-12-06 17:27:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:15,638 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 567 transitions. [2021-12-06 17:27:15,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:27:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 567 transitions. [2021-12-06 17:27:15,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 17:27:15,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:15,638 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] [2021-12-06 17:27:15,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-06 17:27:15,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-12-06 17:27:16,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:27:16,040 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)] === [2021-12-06 17:27:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:16,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1975256279, now seen corresponding path program 1 times [2021-12-06 17:27:16,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:27:16,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631604074] [2021-12-06 17:27:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:16,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:27:16,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:27:16,046 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:27:16,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-06 17:27:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:16,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 17:27:16,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:16,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:27:16,196 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:27:16,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 17:27:16,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-06 17:27:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:27:16,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:27:16,505 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:27:16,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631604074] [2021-12-06 17:27:16,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631604074] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:16,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:27:16,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-12-06 17:27:16,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90389709] [2021-12-06 17:27:16,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:16,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:27:16,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:27:16,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:27:16,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:27:16,506 INFO L87 Difference]: Start difference. First operand 438 states and 567 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 17:27:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:19,681 INFO L93 Difference]: Finished difference Result 736 states and 847 transitions. [2021-12-06 17:27:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:27:19,683 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2021-12-06 17:27:19,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:19,686 INFO L225 Difference]: With dead ends: 736 [2021-12-06 17:27:19,686 INFO L226 Difference]: Without dead ends: 736 [2021-12-06 17:27:19,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:27:19,686 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 466 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 2948 SdHoareTripleChecker+Invalid, 2617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:19,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 2948 Invalid, 2617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2060 Invalid, 0 Unknown, 483 Unchecked, 3.1s Time] [2021-12-06 17:27:19,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-12-06 17:27:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 444. [2021-12-06 17:27:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 290 states have (on average 1.7517241379310344) internal successors, (508), 404 states have internal predecessors, (508), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2021-12-06 17:27:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 573 transitions. [2021-12-06 17:27:19,695 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 573 transitions. Word has length 30 [2021-12-06 17:27:19,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:19,695 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 573 transitions. [2021-12-06 17:27:19,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 17:27:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 573 transitions. [2021-12-06 17:27:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:27:19,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:19,696 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] [2021-12-06 17:27:19,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-06 17:27:19,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:27:19,897 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)] === [2021-12-06 17:27:19,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:19,898 INFO L85 PathProgramCache]: Analyzing trace with hash -154246822, now seen corresponding path program 1 times [2021-12-06 17:27:19,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:27:19,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767720460] [2021-12-06 17:27:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:19,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:27:19,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:27:19,902 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:27:19,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-06 17:27:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:19,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 17:27:19,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:20,051 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:27:20,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 17:27:20,147 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:27:20,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-06 17:27:20,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:27:20,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:27:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:27:20,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:20,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:27:20,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767720460] [2021-12-06 17:27:20,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767720460] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:20,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2078838975] [2021-12-06 17:27:20,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:20,602 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:27:20,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:27:20,603 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:27:20,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-12-06 17:27:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:20,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 17:27:20,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:20,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:27:20,776 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:27:20,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-06 17:27:20,898 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:27:20,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-06 17:27:21,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:27:21,299 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:27:21,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 49 [2021-12-06 17:27:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:27:21,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:21,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2078838975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:21,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:27:21,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 13 [2021-12-06 17:27:21,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761787009] [2021-12-06 17:27:21,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:21,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:27:21,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:27:21,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:27:21,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:27:21,541 INFO L87 Difference]: Start difference. First operand 444 states and 573 transitions. Second operand has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 17:27:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:22,141 INFO L93 Difference]: Finished difference Result 454 states and 583 transitions. [2021-12-06 17:27:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:27:22,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 32 [2021-12-06 17:27:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:22,145 INFO L225 Difference]: With dead ends: 454 [2021-12-06 17:27:22,145 INFO L226 Difference]: Without dead ends: 454 [2021-12-06 17:27:22,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:27:22,145 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 6 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 647 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:22,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1883 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 647 Unchecked, 0.6s Time] [2021-12-06 17:27:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-06 17:27:22,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2021-12-06 17:27:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 299 states have (on average 1.7324414715719063) internal successors, (518), 414 states have internal predecessors, (518), 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) [2021-12-06 17:27:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 583 transitions. [2021-12-06 17:27:22,152 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 583 transitions. Word has length 32 [2021-12-06 17:27:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:22,152 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 583 transitions. [2021-12-06 17:27:22,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 17:27:22,153 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 583 transitions. [2021-12-06 17:27:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:27:22,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:22,153 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] [2021-12-06 17:27:22,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-12-06 17:27:22,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-06 17:27:22,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:27:22,555 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)] === [2021-12-06 17:27:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:22,556 INFO L85 PathProgramCache]: Analyzing trace with hash -154246821, now seen corresponding path program 1 times [2021-12-06 17:27:22,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:27:22,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912959319] [2021-12-06 17:27:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:22,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:27:22,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:27:22,560 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:27:22,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-06 17:27:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:22,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 17:27:22,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:24,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:27:24,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:27:34,949 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:27:34,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 17:27:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:27:35,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:35,688 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:27:35,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912959319] [2021-12-06 17:27:35,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912959319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:35,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2007630116] [2021-12-06 17:27:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:35,689 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:27:35,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:27:35,690 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:27:35,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-12-06 17:27:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:35,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:27:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:35,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:27:35,914 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:27:35,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 17:27:35,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:27:36,002 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:27:36,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 17:27:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:27:36,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:36,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2007630116] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:36,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:27:36,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-12-06 17:27:36,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244026218] [2021-12-06 17:27:36,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:36,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:27:36,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:27:36,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:27:36,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=154, Unknown=6, NotChecked=0, Total=210 [2021-12-06 17:27:36,562 INFO L87 Difference]: Start difference. First operand 454 states and 583 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 17:27:46,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:46,413 INFO L93 Difference]: Finished difference Result 454 states and 582 transitions. [2021-12-06 17:27:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:27:46,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-12-06 17:27:46,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:46,416 INFO L225 Difference]: With dead ends: 454 [2021-12-06 17:27:46,416 INFO L226 Difference]: Without dead ends: 454 [2021-12-06 17:27:46,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=123, Invalid=373, Unknown=10, NotChecked=0, Total=506 [2021-12-06 17:27:46,417 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 12 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:46,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1826 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 752 Invalid, 0 Unknown, 414 Unchecked, 1.6s Time] [2021-12-06 17:27:46,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-06 17:27:46,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2021-12-06 17:27:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 299 states have (on average 1.7290969899665551) internal successors, (517), 414 states have internal predecessors, (517), 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) [2021-12-06 17:27:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 582 transitions. [2021-12-06 17:27:46,423 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 582 transitions. Word has length 32 [2021-12-06 17:27:46,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:46,424 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 582 transitions. [2021-12-06 17:27:46,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 17:27:46,424 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 582 transitions. [2021-12-06 17:27:46,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:27:46,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:46,424 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] [2021-12-06 17:27:46,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-12-06 17:27:46,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-12-06 17:27:46,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:27:46,826 INFO L402 AbstractCegarLoop]: === Iteration 28 === 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)] === [2021-12-06 17:27:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:46,827 INFO L85 PathProgramCache]: Analyzing trace with hash 139156185, now seen corresponding path program 1 times [2021-12-06 17:27:46,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:27:46,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840809636] [2021-12-06 17:27:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:46,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:27:46,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:27:46,831 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:27:46,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-06 17:27:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:27:46,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:27:47,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:27:47,023 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:27:47,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840809636] [2021-12-06 17:27:47,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840809636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:47,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:47,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:27:47,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015996342] [2021-12-06 17:27:47,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:47,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:27:47,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:27:47,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:27:47,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:27:47,024 INFO L87 Difference]: Start difference. First operand 454 states and 582 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) [2021-12-06 17:27:47,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:47,053 INFO L93 Difference]: Finished difference Result 479 states and 608 transitions. [2021-12-06 17:27:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:27:47,054 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 [2021-12-06 17:27:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:47,056 INFO L225 Difference]: With dead ends: 479 [2021-12-06 17:27:47,056 INFO L226 Difference]: Without dead ends: 479 [2021-12-06 17:27:47,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:27:47,056 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 [2021-12-06 17:27:47,057 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] [2021-12-06 17:27:47,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-12-06 17:27:47,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 448. [2021-12-06 17:27:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 293 states have (on average 1.7406143344709897) internal successors, (510), 408 states have internal predecessors, (510), 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) [2021-12-06 17:27:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 575 transitions. [2021-12-06 17:27:47,064 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 575 transitions. Word has length 32 [2021-12-06 17:27:47,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:47,064 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 575 transitions. [2021-12-06 17:27:47,064 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) [2021-12-06 17:27:47,064 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 575 transitions. [2021-12-06 17:27:47,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 17:27:47,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:47,064 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] [2021-12-06 17:27:47,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-12-06 17:27:47,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:27:47,266 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)] === [2021-12-06 17:27:47,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:47,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263433, now seen corresponding path program 1 times [2021-12-06 17:27:47,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:27:47,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712769548] [2021-12-06 17:27:47,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:47,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:27:47,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:27:47,268 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:27:47,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-06 17:27:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:27:47,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:27:47,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:27:47,437 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:27:47,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712769548] [2021-12-06 17:27:47,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712769548] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:47,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:27:47,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-06 17:27:47,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256038239] [2021-12-06 17:27:47,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:47,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:27:47,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:27:47,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:27:47,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:27:47,438 INFO L87 Difference]: Start difference. First operand 448 states and 575 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) [2021-12-06 17:27:47,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:47,459 INFO L93 Difference]: Finished difference Result 447 states and 574 transitions. [2021-12-06 17:27:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:27:47,459 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 [2021-12-06 17:27:47,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:47,461 INFO L225 Difference]: With dead ends: 447 [2021-12-06 17:27:47,461 INFO L226 Difference]: Without dead ends: 447 [2021-12-06 17:27:47,461 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 [2021-12-06 17:27:47,462 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 [2021-12-06 17:27:47,462 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] [2021-12-06 17:27:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-06 17:27:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2021-12-06 17:27:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 293 states have (on average 1.7372013651877134) internal successors, (509), 407 states have internal predecessors, (509), 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) [2021-12-06 17:27:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 574 transitions. [2021-12-06 17:27:47,469 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 574 transitions. Word has length 33 [2021-12-06 17:27:47,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:47,469 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 574 transitions. [2021-12-06 17:27:47,469 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) [2021-12-06 17:27:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 574 transitions. [2021-12-06 17:27:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 17:27:47,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:47,470 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] [2021-12-06 17:27:47,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-12-06 17:27:47,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:27:47,671 INFO L402 AbstractCegarLoop]: === Iteration 30 === 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)] === [2021-12-06 17:27:47,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:47,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263217, now seen corresponding path program 1 times [2021-12-06 17:27:47,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:27:47,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414534580] [2021-12-06 17:27:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:47,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:27:47,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:27:47,676 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:27:47,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-06 17:27:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:27:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:27:47,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:27:47,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:27:47,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414534580] [2021-12-06 17:27:47,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414534580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:47,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:47,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:27:47,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328095796] [2021-12-06 17:27:47,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:47,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:27:47,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:27:47,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:27:47,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:27:47,834 INFO L87 Difference]: Start difference. First operand 447 states and 574 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) [2021-12-06 17:27:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:47,858 INFO L93 Difference]: Finished difference Result 407 states and 451 transitions. [2021-12-06 17:27:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:27:47,858 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 [2021-12-06 17:27:47,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:47,860 INFO L225 Difference]: With dead ends: 407 [2021-12-06 17:27:47,860 INFO L226 Difference]: Without dead ends: 407 [2021-12-06 17:27:47,860 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 [2021-12-06 17:27:47,861 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 [2021-12-06 17:27:47,861 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] [2021-12-06 17:27:47,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-12-06 17:27:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 358. [2021-12-06 17:27:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 215 states have (on average 1.6744186046511629) internal successors, (360), 329 states have internal predecessors, (360), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-06 17:27:47,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 400 transitions. [2021-12-06 17:27:47,866 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 400 transitions. Word has length 33 [2021-12-06 17:27:47,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:47,866 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 400 transitions. [2021-12-06 17:27:47,866 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) [2021-12-06 17:27:47,866 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 400 transitions. [2021-12-06 17:27:47,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 17:27:47,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:47,867 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] [2021-12-06 17:27:47,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-12-06 17:27:48,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:27:48,068 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)] === [2021-12-06 17:27:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:48,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634065, now seen corresponding path program 1 times [2021-12-06 17:27:48,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:27:48,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359355268] [2021-12-06 17:27:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:48,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:27:48,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:27:48,073 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:27:48,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-06 17:27:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:48,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:27:48,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:48,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:27:48,299 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:27:48,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-06 17:27:48,362 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:27:48,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 17:27:50,435 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 17:27:50,436 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 22 treesize of output 27 [2021-12-06 17:27:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 4 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:27:50,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:27:50,749 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:27:50,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359355268] [2021-12-06 17:27:50,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359355268] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:50,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:27:50,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-06 17:27:50,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559002529] [2021-12-06 17:27:50,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:50,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:27:50,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:27:50,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:27:50,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=53, Unknown=1, NotChecked=0, Total=72 [2021-12-06 17:27:50,750 INFO L87 Difference]: Start difference. First operand 358 states and 400 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-12-06 17:27:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:51,014 INFO L93 Difference]: Finished difference Result 362 states and 404 transitions. [2021-12-06 17:27:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:27:51,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 33 [2021-12-06 17:27:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:51,016 INFO L225 Difference]: With dead ends: 362 [2021-12-06 17:27:51,016 INFO L226 Difference]: Without dead ends: 362 [2021-12-06 17:27:51,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 11 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=18, Invalid=53, Unknown=1, NotChecked=0, Total=72 [2021-12-06 17:27:51,017 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 22 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:51,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 702 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2021-12-06 17:27:51,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-06 17:27:51,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2021-12-06 17:27:51,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 215 states have (on average 1.669767441860465) internal successors, (359), 328 states have internal predecessors, (359), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-06 17:27:51,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 399 transitions. [2021-12-06 17:27:51,022 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 399 transitions. Word has length 33 [2021-12-06 17:27:51,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:51,022 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 399 transitions. [2021-12-06 17:27:51,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-12-06 17:27:51,022 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 399 transitions. [2021-12-06 17:27:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 17:27:51,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:51,023 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] [2021-12-06 17:27:51,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-12-06 17:27:51,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:27:51,224 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)] === [2021-12-06 17:27:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:51,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634066, now seen corresponding path program 1 times [2021-12-06 17:27:51,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:27:51,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918668486] [2021-12-06 17:27:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:51,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:27:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:27:51,229 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:27:51,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-06 17:27:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:51,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 17:27:51,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:51,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:27:51,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:27:51,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:27:51,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:27:51,719 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:27:51,719 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 37 [2021-12-06 17:27:51,855 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:27:51,855 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 37 [2021-12-06 17:27:51,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:27:51,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:27:51,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:27:51,982 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:27:51,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 17:27:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:27:52,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:54,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:27:54,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918668486] [2021-12-06 17:27:54,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918668486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:54,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [279186284] [2021-12-06 17:27:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:54,372 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:27:54,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:27:54,373 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:27:54,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-12-06 17:27:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:54,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 17:27:54,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:54,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:27:54,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:27:54,633 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:27:54,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 17:27:54,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:27:54,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:27:54,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:27:54,795 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:27:54,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-06 17:27:54,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:27:54,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:27:54,910 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:27:54,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 17:27:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:27:54,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:57,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [279186284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:57,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:27:57,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2021-12-06 17:27:57,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085452491] [2021-12-06 17:27:57,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:57,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:27:57,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:27:57,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:27:57,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=148, Unknown=1, NotChecked=0, Total=182 [2021-12-06 17:27:57,180 INFO L87 Difference]: Start difference. First operand 357 states and 399 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:28:00,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:00,217 INFO L93 Difference]: Finished difference Result 610 states and 683 transitions. [2021-12-06 17:28:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:28:00,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-12-06 17:28:00,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:00,220 INFO L225 Difference]: With dead ends: 610 [2021-12-06 17:28:00,220 INFO L226 Difference]: Without dead ends: 610 [2021-12-06 17:28:00,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=51, Invalid=220, Unknown=1, NotChecked=0, Total=272 [2021-12-06 17:28:00,221 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 313 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:00,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 1336 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1513 Invalid, 0 Unknown, 302 Unchecked, 2.9s Time] [2021-12-06 17:28:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-06 17:28:00,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 356. [2021-12-06 17:28:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 215 states have (on average 1.6604651162790698) internal successors, (357), 327 states have internal predecessors, (357), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-06 17:28:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 397 transitions. [2021-12-06 17:28:00,227 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 397 transitions. Word has length 33 [2021-12-06 17:28:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:00,227 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 397 transitions. [2021-12-06 17:28:00,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:28:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 397 transitions. [2021-12-06 17:28:00,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 17:28:00,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:00,228 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] [2021-12-06 17:28:00,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-12-06 17:28:00,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-12-06 17:28:00,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:28:00,629 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)] === [2021-12-06 17:28:00,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:00,631 INFO L85 PathProgramCache]: Analyzing trace with hash 610559287, now seen corresponding path program 1 times [2021-12-06 17:28:00,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:28:00,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670100830] [2021-12-06 17:28:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:00,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:28:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:28:00,634 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:28:00,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-06 17:28:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:00,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:28:00,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:28:00,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:28:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:28:01,111 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:28:01,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670100830] [2021-12-06 17:28:01,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670100830] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:28:01,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:28:01,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-06 17:28:01,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340750066] [2021-12-06 17:28:01,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:28:01,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:28:01,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:28:01,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:28:01,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:28:01,112 INFO L87 Difference]: Start difference. First operand 356 states and 397 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) [2021-12-06 17:28:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:01,167 INFO L93 Difference]: Finished difference Result 358 states and 399 transitions. [2021-12-06 17:28:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:28:01,168 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 [2021-12-06 17:28:01,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:01,169 INFO L225 Difference]: With dead ends: 358 [2021-12-06 17:28:01,169 INFO L226 Difference]: Without dead ends: 358 [2021-12-06 17:28:01,169 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 [2021-12-06 17:28:01,170 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 19 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:01,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 1825 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 88 Unchecked, 0.0s Time] [2021-12-06 17:28:01,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-06 17:28:01,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2021-12-06 17:28:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 217 states have (on average 1.6543778801843319) internal successors, (359), 329 states have internal predecessors, (359), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-06 17:28:01,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 399 transitions. [2021-12-06 17:28:01,175 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 399 transitions. Word has length 34 [2021-12-06 17:28:01,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:01,175 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 399 transitions. [2021-12-06 17:28:01,175 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) [2021-12-06 17:28:01,175 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 399 transitions. [2021-12-06 17:28:01,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 17:28:01,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:01,175 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] [2021-12-06 17:28:01,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-12-06 17:28:01,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:28:01,377 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)] === [2021-12-06 17:28:01,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:01,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671515, now seen corresponding path program 1 times [2021-12-06 17:28:01,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:28:01,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003561438] [2021-12-06 17:28:01,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:01,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:28:01,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:28:01,382 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:28:01,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-06 17:28:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:01,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:28:01,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:01,696 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:28:01,696 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 14 treesize of output 20 [2021-12-06 17:28:01,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:28:01,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:28:01,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 17:28:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:28:01,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:28:01,991 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-06 17:28:01,991 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 [2021-12-06 17:28:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:28:02,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:28:02,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003561438] [2021-12-06 17:28:02,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003561438] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:28:02,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:28:02,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2021-12-06 17:28:02,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984786960] [2021-12-06 17:28:02,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:02,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:28:02,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:28:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:28:02,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:28:02,168 INFO L87 Difference]: Start difference. First operand 358 states and 399 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) [2021-12-06 17:28:03,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:03,874 INFO L93 Difference]: Finished difference Result 398 states and 441 transitions. [2021-12-06 17:28:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:28:03,875 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 [2021-12-06 17:28:03,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:03,876 INFO L225 Difference]: With dead ends: 398 [2021-12-06 17:28:03,877 INFO L226 Difference]: Without dead ends: 398 [2021-12-06 17:28:03,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-12-06 17:28:03,877 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 91 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:03,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1721 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 17:28:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-12-06 17:28:03,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 360. [2021-12-06 17:28:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 219 states have (on average 1.6529680365296804) internal successors, (362), 331 states have internal predecessors, (362), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-06 17:28:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 402 transitions. [2021-12-06 17:28:03,882 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 402 transitions. Word has length 34 [2021-12-06 17:28:03,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:03,882 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 402 transitions. [2021-12-06 17:28:03,883 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) [2021-12-06 17:28:03,883 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 402 transitions. [2021-12-06 17:28:03,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 17:28:03,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:03,883 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] [2021-12-06 17:28:03,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-12-06 17:28:04,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:28:04,084 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)] === [2021-12-06 17:28:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:04,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671516, now seen corresponding path program 1 times [2021-12-06 17:28:04,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:28:04,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065015294] [2021-12-06 17:28:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:04,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:28:04,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:28:04,090 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:28:04,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-12-06 17:28:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:04,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 17:28:04,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:04,378 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:28:04,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 17:28:04,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:28:04,411 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:28:04,411 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 14 treesize of output 20 [2021-12-06 17:28:04,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:28:04,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:28:04,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 17:28:04,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 17:28:04,766 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:28:04,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 17:28:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:28:04,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:28:04,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:28:04,945 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 [2021-12-06 17:28:05,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-06 17:28:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:28:05,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:28:05,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065015294] [2021-12-06 17:28:05,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065015294] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:28:05,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:28:05,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2021-12-06 17:28:05,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918329523] [2021-12-06 17:28:05,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:05,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:28:05,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:28:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:28:05,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:28:05,875 INFO L87 Difference]: Start difference. First operand 360 states and 402 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) [2021-12-06 17:28:08,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:08,898 INFO L93 Difference]: Finished difference Result 398 states and 441 transitions. [2021-12-06 17:28:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:28:08,900 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 [2021-12-06 17:28:08,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:08,901 INFO L225 Difference]: With dead ends: 398 [2021-12-06 17:28:08,901 INFO L226 Difference]: Without dead ends: 398 [2021-12-06 17:28:08,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-12-06 17:28:08,902 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 137 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:08,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 1502 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 17:28:08,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-12-06 17:28:08,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 360. [2021-12-06 17:28:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 219 states have (on average 1.6484018264840183) internal successors, (361), 331 states have internal predecessors, (361), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-06 17:28:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 401 transitions. [2021-12-06 17:28:08,907 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 401 transitions. Word has length 34 [2021-12-06 17:28:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:08,907 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 401 transitions. [2021-12-06 17:28:08,907 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) [2021-12-06 17:28:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 401 transitions. [2021-12-06 17:28:08,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 17:28:08,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:08,907 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] [2021-12-06 17:28:08,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-12-06 17:28:09,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:28:09,109 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)] === [2021-12-06 17:28:09,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:09,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1747469131, now seen corresponding path program 1 times [2021-12-06 17:28:09,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:28:09,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023452902] [2021-12-06 17:28:09,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:09,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:28:09,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:28:09,114 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:28:09,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-06 17:28:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:09,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:28:09,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:09,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:28:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:28:09,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:28:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:28:09,370 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:28:09,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023452902] [2021-12-06 17:28:09,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023452902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:28:09,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:28:09,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-12-06 17:28:09,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611517707] [2021-12-06 17:28:09,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:28:09,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:28:09,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:28:09,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:28:09,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:28:09,371 INFO L87 Difference]: Start difference. First operand 360 states and 401 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) [2021-12-06 17:28:09,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:09,862 INFO L93 Difference]: Finished difference Result 363 states and 404 transitions. [2021-12-06 17:28:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:28:09,863 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 [2021-12-06 17:28:09,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:09,865 INFO L225 Difference]: With dead ends: 363 [2021-12-06 17:28:09,865 INFO L226 Difference]: Without dead ends: 363 [2021-12-06 17:28:09,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:28:09,865 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 0 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:09,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1159 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 159 Unchecked, 0.5s Time] [2021-12-06 17:28:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-12-06 17:28:09,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2021-12-06 17:28:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 222 states have (on average 1.6396396396396395) internal successors, (364), 334 states have internal predecessors, (364), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-06 17:28:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 404 transitions. [2021-12-06 17:28:09,870 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 404 transitions. Word has length 35 [2021-12-06 17:28:09,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:09,870 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 404 transitions. [2021-12-06 17:28:09,870 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) [2021-12-06 17:28:09,870 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 404 transitions. [2021-12-06 17:28:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 17:28:09,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:09,870 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] [2021-12-06 17:28:09,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-12-06 17:28:10,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:28:10,072 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)] === [2021-12-06 17:28:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash 4658796, now seen corresponding path program 1 times [2021-12-06 17:28:10,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:28:10,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012174516] [2021-12-06 17:28:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:10,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:28:10,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:28:10,075 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:28:10,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-12-06 17:28:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:10,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:28:10,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:28:10,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:28:10,200 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:28:10,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012174516] [2021-12-06 17:28:10,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012174516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:10,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:28:10,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:28:10,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279122054] [2021-12-06 17:28:10,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:10,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:28:10,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:28:10,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:28:10,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:28:10,201 INFO L87 Difference]: Start difference. First operand 363 states and 404 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) [2021-12-06 17:28:10,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:10,228 INFO L93 Difference]: Finished difference Result 405 states and 447 transitions. [2021-12-06 17:28:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:28:10,229 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 [2021-12-06 17:28:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:10,230 INFO L225 Difference]: With dead ends: 405 [2021-12-06 17:28:10,230 INFO L226 Difference]: Without dead ends: 405 [2021-12-06 17:28:10,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:28:10,231 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 [2021-12-06 17:28:10,231 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] [2021-12-06 17:28:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-06 17:28:10,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 361. [2021-12-06 17:28:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 220 states have (on average 1.6409090909090909) internal successors, (361), 332 states have internal predecessors, (361), 16 states have call successors, (16), 11 states have call predecessors, (16), 15 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2021-12-06 17:28:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 401 transitions. [2021-12-06 17:28:10,236 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 401 transitions. Word has length 35 [2021-12-06 17:28:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:10,236 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 401 transitions. [2021-12-06 17:28:10,236 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) [2021-12-06 17:28:10,236 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 401 transitions. [2021-12-06 17:28:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:28:10,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:10,236 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] [2021-12-06 17:28:10,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-12-06 17:28:10,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:28:10,438 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)] === [2021-12-06 17:28:10,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:10,439 INFO L85 PathProgramCache]: Analyzing trace with hash -14364371, now seen corresponding path program 1 times [2021-12-06 17:28:10,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:28:10,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535771881] [2021-12-06 17:28:10,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:10,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:28:10,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:28:10,442 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:28:10,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-06 17:28:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:10,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:28:10,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:28:10,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:28:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:28:11,046 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:28:11,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535771881] [2021-12-06 17:28:11,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535771881] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:28:11,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:28:11,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-06 17:28:11,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014658578] [2021-12-06 17:28:11,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:28:11,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:28:11,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:28:11,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:28:11,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:28:11,048 INFO L87 Difference]: Start difference. First operand 361 states and 401 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) [2021-12-06 17:28:11,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:11,185 INFO L93 Difference]: Finished difference Result 565 states and 629 transitions. [2021-12-06 17:28:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:28:11,186 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 [2021-12-06 17:28:11,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:11,188 INFO L225 Difference]: With dead ends: 565 [2021-12-06 17:28:11,188 INFO L226 Difference]: Without dead ends: 565 [2021-12-06 17:28:11,188 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 [2021-12-06 17:28:11,188 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 292 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:11,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 1824 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 91 Invalid, 0 Unknown, 171 Unchecked, 0.1s Time] [2021-12-06 17:28:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-12-06 17:28:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 444. [2021-12-06 17:28:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 293 states have (on average 1.6928327645051195) internal successors, (496), 404 states have internal predecessors, (496), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2021-12-06 17:28:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 553 transitions. [2021-12-06 17:28:11,194 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 553 transitions. Word has length 37 [2021-12-06 17:28:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:11,194 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 553 transitions. [2021-12-06 17:28:11,194 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) [2021-12-06 17:28:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 553 transitions. [2021-12-06 17:28:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:28:11,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:11,195 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] [2021-12-06 17:28:11,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-12-06 17:28:11,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:28:11,396 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)] === [2021-12-06 17:28:11,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:11,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181508, now seen corresponding path program 1 times [2021-12-06 17:28:11,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:28:11,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757528128] [2021-12-06 17:28:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:11,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:28:11,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:28:11,401 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:28:11,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-12-06 17:28:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:11,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:28:11,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:28:11,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:28:11,535 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:28:11,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757528128] [2021-12-06 17:28:11,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757528128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:11,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:28:11,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:28:11,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694544767] [2021-12-06 17:28:11,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:11,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:28:11,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:28:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:28:11,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:28:11,536 INFO L87 Difference]: Start difference. First operand 444 states and 553 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) [2021-12-06 17:28:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:11,919 INFO L93 Difference]: Finished difference Result 462 states and 573 transitions. [2021-12-06 17:28:11,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:28:11,920 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 [2021-12-06 17:28:11,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:11,922 INFO L225 Difference]: With dead ends: 462 [2021-12-06 17:28:11,922 INFO L226 Difference]: Without dead ends: 462 [2021-12-06 17:28:11,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:28:11,923 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 42 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:11,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 738 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:28:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-06 17:28:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 445. [2021-12-06 17:28:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 295 states have (on average 1.6915254237288135) internal successors, (499), 405 states have internal predecessors, (499), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2021-12-06 17:28:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 556 transitions. [2021-12-06 17:28:11,928 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 556 transitions. Word has length 37 [2021-12-06 17:28:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:11,928 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 556 transitions. [2021-12-06 17:28:11,929 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) [2021-12-06 17:28:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 556 transitions. [2021-12-06 17:28:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:28:11,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:11,929 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] [2021-12-06 17:28:11,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-12-06 17:28:12,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:28:12,130 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)] === [2021-12-06 17:28:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181509, now seen corresponding path program 1 times [2021-12-06 17:28:12,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:28:12,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273209623] [2021-12-06 17:28:12,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:12,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:28:12,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:28:12,135 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:28:12,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-06 17:28:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:12,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 17:28:12,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:12,476 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:28:12,477 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 14 treesize of output 20 [2021-12-06 17:28:12,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:28:12,502 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:28:12,502 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 14 treesize of output 20 [2021-12-06 17:28:12,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:28:12,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:28:12,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 17:28:12,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 17:28:12,827 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:28:12,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 17:28:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:28:12,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:28:12,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-06 17:28:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:28:13,224 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:28:13,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273209623] [2021-12-06 17:28:13,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273209623] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:28:13,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:28:13,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2021-12-06 17:28:13,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563971847] [2021-12-06 17:28:13,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:13,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:28:13,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:28:13,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:28:13,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:28:13,225 INFO L87 Difference]: Start difference. First operand 445 states and 556 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) [2021-12-06 17:28:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:14,468 INFO L93 Difference]: Finished difference Result 451 states and 561 transitions. [2021-12-06 17:28:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:28:14,469 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 [2021-12-06 17:28:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:14,471 INFO L225 Difference]: With dead ends: 451 [2021-12-06 17:28:14,471 INFO L226 Difference]: Without dead ends: 451 [2021-12-06 17:28:14,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-12-06 17:28:14,472 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 30 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:14,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1940 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:28:14,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-06 17:28:14,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 447. [2021-12-06 17:28:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 297 states have (on average 1.6868686868686869) internal successors, (501), 407 states have internal predecessors, (501), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2021-12-06 17:28:14,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 558 transitions. [2021-12-06 17:28:14,477 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 558 transitions. Word has length 37 [2021-12-06 17:28:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:14,477 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 558 transitions. [2021-12-06 17:28:14,477 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) [2021-12-06 17:28:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 558 transitions. [2021-12-06 17:28:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 17:28:14,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:14,478 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] [2021-12-06 17:28:14,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-12-06 17:28:14,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:28:14,679 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)] === [2021-12-06 17:28:14,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:14,680 INFO L85 PathProgramCache]: Analyzing trace with hash -445295076, now seen corresponding path program 1 times [2021-12-06 17:28:14,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:28:14,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295139360] [2021-12-06 17:28:14,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:14,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:28:14,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:28:14,684 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:28:14,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-12-06 17:28:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:14,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 17:28:14,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:14,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:28:14,897 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:28:14,898 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 37 [2021-12-06 17:28:15,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-06 17:28:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:28:15,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:28:15,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:28:15,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295139360] [2021-12-06 17:28:15,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295139360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:28:15,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2015619427] [2021-12-06 17:28:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:15,149 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:28:15,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:28:15,150 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:28:15,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-12-06 17:28:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:15,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 17:28:15,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:15,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:28:15,346 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:28:15,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-12-06 17:28:15,481 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:28:15,481 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 49 treesize of output 58 [2021-12-06 17:28:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:28:15,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:28:15,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2015619427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:28:15,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:28:15,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-12-06 17:28:15,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720520872] [2021-12-06 17:28:15,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:28:15,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:28:15,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:28:15,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:28:15,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:28:15,612 INFO L87 Difference]: Start difference. First operand 447 states and 558 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:28:17,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:17,147 INFO L93 Difference]: Finished difference Result 450 states and 562 transitions. [2021-12-06 17:28:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:28:17,148 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-12-06 17:28:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:17,150 INFO L225 Difference]: With dead ends: 450 [2021-12-06 17:28:17,150 INFO L226 Difference]: Without dead ends: 450 [2021-12-06 17:28:17,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 13 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:28:17,151 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 49 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:17,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 2196 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 709 Invalid, 0 Unknown, 360 Unchecked, 1.5s Time] [2021-12-06 17:28:17,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-06 17:28:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2021-12-06 17:28:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 298 states have (on average 1.6845637583892616) internal successors, (502), 408 states have internal predecessors, (502), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2021-12-06 17:28:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 559 transitions. [2021-12-06 17:28:17,156 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 559 transitions. Word has length 38 [2021-12-06 17:28:17,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:17,156 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 559 transitions. [2021-12-06 17:28:17,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:28:17,156 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 559 transitions. [2021-12-06 17:28:17,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 17:28:17,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:17,157 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] [2021-12-06 17:28:17,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-12-06 17:28:17,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2021-12-06 17:28:17,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:28:17,558 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)] === [2021-12-06 17:28:17,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:17,560 INFO L85 PathProgramCache]: Analyzing trace with hash -183877918, now seen corresponding path program 1 times [2021-12-06 17:28:17,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:28:17,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915953699] [2021-12-06 17:28:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:17,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:28:17,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:28:17,562 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:28:17,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-12-06 17:28:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:17,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:28:17,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:28:26,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:28:26,609 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 [2021-12-06 17:28:29,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:28:29,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915953699] [2021-12-06 17:28:29,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915953699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:28:29,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [325910771] [2021-12-06 17:28:29,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:29,036 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:28:29,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:28:29,037 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:28:29,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-12-06 17:28:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:29,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 17:28:29,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:28:42,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:28:44,588 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 [2021-12-06 17:28:47,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [325910771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:28:47,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:28:47,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-12-06 17:28:47,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982635285] [2021-12-06 17:28:47,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:28:47,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:28:47,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:28:47,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:28:47,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=803, Unknown=10, NotChecked=0, Total=930 [2021-12-06 17:28:47,052 INFO L87 Difference]: Start difference. First operand 448 states and 559 transitions. Second operand has 22 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 17:28:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:48,403 INFO L93 Difference]: Finished difference Result 453 states and 564 transitions. [2021-12-06 17:28:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:28:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2021-12-06 17:28:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:48,406 INFO L225 Difference]: With dead ends: 453 [2021-12-06 17:28:48,406 INFO L226 Difference]: Without dead ends: 434 [2021-12-06 17:28:48,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=144, Invalid=1106, Unknown=10, NotChecked=0, Total=1260 [2021-12-06 17:28:48,407 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 64 mSDsluCounter, 2609 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2914 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1527 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:48,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 2914 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 396 Invalid, 0 Unknown, 1527 Unchecked, 1.0s Time] [2021-12-06 17:28:48,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-12-06 17:28:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 432. [2021-12-06 17:28:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 283 states have (on average 1.7173144876325088) internal successors, (486), 393 states have internal predecessors, (486), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:28:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 542 transitions. [2021-12-06 17:28:48,412 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 542 transitions. Word has length 39 [2021-12-06 17:28:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:48,412 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 542 transitions. [2021-12-06 17:28:48,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 17:28:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 542 transitions. [2021-12-06 17:28:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:28:48,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:48,413 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] [2021-12-06 17:28:48,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-12-06 17:28:48,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2021-12-06 17:28:48,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:28:48,815 INFO L402 AbstractCegarLoop]: === Iteration 43 === 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)] === [2021-12-06 17:28:48,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:48,816 INFO L85 PathProgramCache]: Analyzing trace with hash -789046589, now seen corresponding path program 1 times [2021-12-06 17:28:48,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:28:48,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572639684] [2021-12-06 17:28:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:48,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:28:48,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:28:48,819 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:28:48,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-12-06 17:28:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:48,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:28:48,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:28:48,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:28:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:28:49,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:28:49,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572639684] [2021-12-06 17:28:49,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572639684] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:28:49,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:28:49,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-06 17:28:49,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662821357] [2021-12-06 17:28:49,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:28:49,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:28:49,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:28:49,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:28:49,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:28:49,008 INFO L87 Difference]: Start difference. First operand 432 states and 542 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) [2021-12-06 17:28:49,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:49,029 INFO L93 Difference]: Finished difference Result 431 states and 541 transitions. [2021-12-06 17:28:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:28:49,029 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 [2021-12-06 17:28:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:49,031 INFO L225 Difference]: With dead ends: 431 [2021-12-06 17:28:49,031 INFO L226 Difference]: Without dead ends: 431 [2021-12-06 17:28:49,031 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 [2021-12-06 17:28:49,032 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 [2021-12-06 17:28:49,032 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] [2021-12-06 17:28:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-12-06 17:28:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2021-12-06 17:28:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 283 states have (on average 1.7137809187279152) internal successors, (485), 392 states have internal predecessors, (485), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:28:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 541 transitions. [2021-12-06 17:28:49,037 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 541 transitions. Word has length 41 [2021-12-06 17:28:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:49,037 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 541 transitions. [2021-12-06 17:28:49,037 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) [2021-12-06 17:28:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 541 transitions. [2021-12-06 17:28:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:28:49,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:49,038 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] [2021-12-06 17:28:49,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-12-06 17:28:49,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:28:49,239 INFO L402 AbstractCegarLoop]: === Iteration 44 === 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)] === [2021-12-06 17:28:49,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:49,240 INFO L85 PathProgramCache]: Analyzing trace with hash -817675940, now seen corresponding path program 1 times [2021-12-06 17:28:49,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:28:49,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051931296] [2021-12-06 17:28:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:49,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:28:49,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:28:49,244 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:28:49,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-12-06 17:28:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:49,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:28:49,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:49,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:28:49,434 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 17:28:49,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-12-06 17:28:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 17:28:49,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:28:49,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:28:49,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051931296] [2021-12-06 17:28:49,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051931296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:49,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:28:49,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:28:49,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639027240] [2021-12-06 17:28:49,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:49,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:28:49,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:28:49,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:28:49,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:28:49,446 INFO L87 Difference]: Start difference. First operand 431 states and 541 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:28:50,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:50,509 INFO L93 Difference]: Finished difference Result 485 states and 556 transitions. [2021-12-06 17:28:50,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:28:50,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-12-06 17:28:50,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:50,511 INFO L225 Difference]: With dead ends: 485 [2021-12-06 17:28:50,511 INFO L226 Difference]: Without dead ends: 485 [2021-12-06 17:28:50,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:28:50,512 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 161 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:50,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 870 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 353 Invalid, 0 Unknown, 201 Unchecked, 1.1s Time] [2021-12-06 17:28:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-12-06 17:28:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 430. [2021-12-06 17:28:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 283 states have (on average 1.7102473498233215) internal successors, (484), 391 states have internal predecessors, (484), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:28:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 540 transitions. [2021-12-06 17:28:50,517 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 540 transitions. Word has length 41 [2021-12-06 17:28:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:50,518 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 540 transitions. [2021-12-06 17:28:50,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 17:28:50,518 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 540 transitions. [2021-12-06 17:28:50,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:28:50,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:50,518 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] [2021-12-06 17:28:50,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-12-06 17:28:50,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:28:50,719 INFO L402 AbstractCegarLoop]: === Iteration 45 === 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)] === [2021-12-06 17:28:50,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash -817675939, now seen corresponding path program 1 times [2021-12-06 17:28:50,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:28:50,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595617617] [2021-12-06 17:28:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:50,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:28:50,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:28:50,725 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:28:50,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-12-06 17:28:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:50,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:28:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:50,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:28:50,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:28:50,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 17:28:50,997 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:28:50,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 17:28:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:28:51,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:28:51,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:28:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595617617] [2021-12-06 17:28:51,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595617617] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:28:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [218097936] [2021-12-06 17:28:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:51,295 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:28:51,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:28:51,295 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:28:51,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2021-12-06 17:28:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 17:28:51,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:51,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:28:51,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:28:51,681 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:28:51,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 17:28:51,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:28:51,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:28:51,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:28:51,857 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:28:51,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-06 17:29:00,093 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:29:00,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 17:29:02,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:29:02,377 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 17:29:02,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 26 [2021-12-06 17:29:02,394 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:29:02,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 17:29:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:29:02,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:29:02,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [218097936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:29:02,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:29:02,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 20 [2021-12-06 17:29:02,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420841115] [2021-12-06 17:29:02,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:29:02,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 17:29:02,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:29:02,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 17:29:02,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=425, Unknown=4, NotChecked=0, Total=506 [2021-12-06 17:29:02,626 INFO L87 Difference]: Start difference. First operand 430 states and 540 transitions. Second operand has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-06 17:29:12,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:12,030 INFO L93 Difference]: Finished difference Result 674 states and 819 transitions. [2021-12-06 17:29:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:29:12,031 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 41 [2021-12-06 17:29:12,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:12,034 INFO L225 Difference]: With dead ends: 674 [2021-12-06 17:29:12,034 INFO L226 Difference]: Without dead ends: 674 [2021-12-06 17:29:12,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=99, Invalid=544, Unknown=7, NotChecked=0, Total=650 [2021-12-06 17:29:12,035 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 812 mSDsluCounter, 3009 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 3345 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 922 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:12,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 3345 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1983 Invalid, 0 Unknown, 922 Unchecked, 3.2s Time] [2021-12-06 17:29:12,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-12-06 17:29:12,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 426. [2021-12-06 17:29:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 280 states have (on average 1.7107142857142856) internal successors, (479), 388 states have internal predecessors, (479), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:29:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 535 transitions. [2021-12-06 17:29:12,042 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 535 transitions. Word has length 41 [2021-12-06 17:29:12,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:12,042 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 535 transitions. [2021-12-06 17:29:12,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-06 17:29:12,042 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 535 transitions. [2021-12-06 17:29:12,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:29:12,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:12,043 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] [2021-12-06 17:29:12,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2021-12-06 17:29:12,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2021-12-06 17:29:12,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:29:12,445 INFO L402 AbstractCegarLoop]: === Iteration 46 === 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)] === [2021-12-06 17:29:12,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:12,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1368793298, now seen corresponding path program 1 times [2021-12-06 17:29:12,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:29:12,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638176359] [2021-12-06 17:29:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:12,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:29:12,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:29:12,447 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:29:12,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-12-06 17:29:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:12,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:29:12,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:12,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:29:12,651 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:29:12,652 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 34 treesize of output 41 [2021-12-06 17:29:12,763 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:29:12,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 45 [2021-12-06 17:29:12,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-12-06 17:29:12,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-06 17:29:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:29:12,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:29:13,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:29:13,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638176359] [2021-12-06 17:29:13,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638176359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:29:13,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1397368680] [2021-12-06 17:29:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:13,266 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:29:13,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:29:13,266 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:29:13,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-12-06 17:29:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:13,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:29:13,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:13,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:29:13,466 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:29:13,466 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 [2021-12-06 17:29:13,564 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:29:13,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2021-12-06 17:29:13,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-12-06 17:29:13,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-06 17:29:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:29:13,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:29:14,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1397368680] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:29:14,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:29:14,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-12-06 17:29:14,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825847505] [2021-12-06 17:29:14,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:29:14,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 17:29:14,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:29:14,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 17:29:14,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:29:14,035 INFO L87 Difference]: Start difference. First operand 426 states and 535 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:29:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:15,709 INFO L93 Difference]: Finished difference Result 523 states and 598 transitions. [2021-12-06 17:29:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:29:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-12-06 17:29:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:15,712 INFO L225 Difference]: With dead ends: 523 [2021-12-06 17:29:15,712 INFO L226 Difference]: Without dead ends: 523 [2021-12-06 17:29:15,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 22 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:29:15,712 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 220 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:15,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1991 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 992 Invalid, 0 Unknown, 227 Unchecked, 1.6s Time] [2021-12-06 17:29:15,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-06 17:29:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 429. [2021-12-06 17:29:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 283 states have (on average 1.7031802120141342) internal successors, (482), 391 states have internal predecessors, (482), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:29:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 538 transitions. [2021-12-06 17:29:15,718 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 538 transitions. Word has length 41 [2021-12-06 17:29:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:15,718 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 538 transitions. [2021-12-06 17:29:15,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 17:29:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 538 transitions. [2021-12-06 17:29:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 17:29:15,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:15,719 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] [2021-12-06 17:29:15,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2021-12-06 17:29:15,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2021-12-06 17:29:16,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:29:16,121 INFO L402 AbstractCegarLoop]: === Iteration 47 === 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)] === [2021-12-06 17:29:16,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:16,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1309353403, now seen corresponding path program 1 times [2021-12-06 17:29:16,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:29:16,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237497289] [2021-12-06 17:29:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:16,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:29:16,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:29:16,125 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:29:16,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-12-06 17:29:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:16,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:29:16,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:29:16,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:29:16,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:29:16,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237497289] [2021-12-06 17:29:16,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237497289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:16,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:29:16,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:29:16,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411363058] [2021-12-06 17:29:16,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:16,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:29:16,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:29:16,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:29:16,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:29:16,321 INFO L87 Difference]: Start difference. First operand 429 states and 538 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, (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) [2021-12-06 17:29:16,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:16,350 INFO L93 Difference]: Finished difference Result 488 states and 602 transitions. [2021-12-06 17:29:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:29:16,350 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, (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 [2021-12-06 17:29:16,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:16,352 INFO L225 Difference]: With dead ends: 488 [2021-12-06 17:29:16,352 INFO L226 Difference]: Without dead ends: 488 [2021-12-06 17:29:16,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:29:16,353 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 53 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1425 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 [2021-12-06 17:29:16,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1425 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:29:16,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-12-06 17:29:16,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 431. [2021-12-06 17:29:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 285 states have (on average 1.6982456140350877) internal successors, (484), 392 states have internal predecessors, (484), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:29:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 540 transitions. [2021-12-06 17:29:16,358 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 540 transitions. Word has length 42 [2021-12-06 17:29:16,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:16,359 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 540 transitions. [2021-12-06 17:29:16,359 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, (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) [2021-12-06 17:29:16,359 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 540 transitions. [2021-12-06 17:29:16,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 17:29:16,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:16,359 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] [2021-12-06 17:29:16,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2021-12-06 17:29:16,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:29:16,561 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)] === [2021-12-06 17:29:16,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:16,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1309359926, now seen corresponding path program 1 times [2021-12-06 17:29:16,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:29:16,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340244281] [2021-12-06 17:29:16,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:16,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:29:16,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:29:16,566 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:29:16,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-12-06 17:29:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:16,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:29:16,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 17:29:17,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:29:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:29:17,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:29:17,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340244281] [2021-12-06 17:29:17,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340244281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:29:17,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:29:17,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-06 17:29:17,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441272938] [2021-12-06 17:29:17,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:29:17,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:29:17,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:29:17,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:29:17,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:29:17,154 INFO L87 Difference]: Start difference. First operand 431 states and 540 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) [2021-12-06 17:29:17,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:17,374 INFO L93 Difference]: Finished difference Result 556 states and 619 transitions. [2021-12-06 17:29:17,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:29:17,374 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 [2021-12-06 17:29:17,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:17,376 INFO L225 Difference]: With dead ends: 556 [2021-12-06 17:29:17,376 INFO L226 Difference]: Without dead ends: 556 [2021-12-06 17:29:17,376 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 [2021-12-06 17:29:17,377 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 304 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:17,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 2481 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 165 Invalid, 0 Unknown, 181 Unchecked, 0.2s Time] [2021-12-06 17:29:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-12-06 17:29:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 439. [2021-12-06 17:29:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 291 states have (on average 1.6872852233676976) internal successors, (491), 399 states have internal predecessors, (491), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:29:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 547 transitions. [2021-12-06 17:29:17,383 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 547 transitions. Word has length 42 [2021-12-06 17:29:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:17,383 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 547 transitions. [2021-12-06 17:29:17,383 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) [2021-12-06 17:29:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 547 transitions. [2021-12-06 17:29:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 17:29:17,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:17,384 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] [2021-12-06 17:29:17,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-12-06 17:29:17,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:29:17,585 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)] === [2021-12-06 17:29:17,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:17,586 INFO L85 PathProgramCache]: Analyzing trace with hash 421849722, now seen corresponding path program 1 times [2021-12-06 17:29:17,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:29:17,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589712008] [2021-12-06 17:29:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:17,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:29:17,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:29:17,590 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:29:17,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-12-06 17:29:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:17,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:29:17,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:17,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:29:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:29:17,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:29:17,762 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:29:17,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589712008] [2021-12-06 17:29:17,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589712008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:17,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:29:17,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:29:17,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819127131] [2021-12-06 17:29:17,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:17,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:29:17,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:29:17,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:29:17,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:29:17,763 INFO L87 Difference]: Start difference. First operand 439 states and 547 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) [2021-12-06 17:29:18,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:18,260 INFO L93 Difference]: Finished difference Result 444 states and 553 transitions. [2021-12-06 17:29:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:29:18,261 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 [2021-12-06 17:29:18,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:18,263 INFO L225 Difference]: With dead ends: 444 [2021-12-06 17:29:18,263 INFO L226 Difference]: Without dead ends: 444 [2021-12-06 17:29:18,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:29:18,264 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 14 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2021-12-06 17:29:18,264 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] [2021-12-06 17:29:18,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-12-06 17:29:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 438. [2021-12-06 17:29:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 291 states have (on average 1.6838487972508591) internal successors, (490), 398 states have internal predecessors, (490), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:29:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 546 transitions. [2021-12-06 17:29:18,270 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 546 transitions. Word has length 42 [2021-12-06 17:29:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:18,270 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 546 transitions. [2021-12-06 17:29:18,270 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) [2021-12-06 17:29:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 546 transitions. [2021-12-06 17:29:18,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 17:29:18,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:18,270 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] [2021-12-06 17:29:18,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-12-06 17:29:18,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:29:18,472 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)] === [2021-12-06 17:29:18,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:18,473 INFO L85 PathProgramCache]: Analyzing trace with hash 421849723, now seen corresponding path program 1 times [2021-12-06 17:29:18,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:29:18,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617210313] [2021-12-06 17:29:18,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:18,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:29:18,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:29:18,475 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:29:18,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-12-06 17:29:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:18,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 17:29:18,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:18,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:29:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 17:29:18,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:29:18,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:29:18,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617210313] [2021-12-06 17:29:18,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617210313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:18,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:29:18,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:29:18,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645921059] [2021-12-06 17:29:18,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:18,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:29:18,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:29:18,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:29:18,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:29:18,680 INFO L87 Difference]: Start difference. First operand 438 states and 546 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-12-06 17:29:19,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:19,616 INFO L93 Difference]: Finished difference Result 493 states and 606 transitions. [2021-12-06 17:29:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:29:19,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 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 42 [2021-12-06 17:29:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:19,619 INFO L225 Difference]: With dead ends: 493 [2021-12-06 17:29:19,619 INFO L226 Difference]: Without dead ends: 493 [2021-12-06 17:29:19,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:29:19,619 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 57 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:19,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 1424 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:29:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-12-06 17:29:19,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 437. [2021-12-06 17:29:19,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 291 states have (on average 1.6804123711340206) internal successors, (489), 397 states have internal predecessors, (489), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:29:19,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 545 transitions. [2021-12-06 17:29:19,625 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 545 transitions. Word has length 42 [2021-12-06 17:29:19,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:19,625 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 545 transitions. [2021-12-06 17:29:19,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-12-06 17:29:19,625 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 545 transitions. [2021-12-06 17:29:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 17:29:19,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:19,626 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] [2021-12-06 17:29:19,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2021-12-06 17:29:19,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:29:19,827 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)] === [2021-12-06 17:29:19,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:19,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1935452453, now seen corresponding path program 1 times [2021-12-06 17:29:19,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:29:19,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772040966] [2021-12-06 17:29:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:19,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:29:19,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:29:19,832 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:29:19,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-12-06 17:29:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:19,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:29:19,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:19,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:29:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:29:20,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:29:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:29:20,122 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:29:20,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772040966] [2021-12-06 17:29:20,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772040966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:29:20,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:29:20,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-12-06 17:29:20,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305788253] [2021-12-06 17:29:20,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:29:20,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:29:20,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:29:20,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:29:20,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:29:20,123 INFO L87 Difference]: Start difference. First operand 437 states and 545 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) [2021-12-06 17:29:20,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:20,692 INFO L93 Difference]: Finished difference Result 442 states and 551 transitions. [2021-12-06 17:29:20,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:29:20,693 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 [2021-12-06 17:29:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:20,695 INFO L225 Difference]: With dead ends: 442 [2021-12-06 17:29:20,695 INFO L226 Difference]: Without dead ends: 442 [2021-12-06 17:29:20,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:29:20,696 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 0 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:20,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1131 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 384 Invalid, 0 Unknown, 156 Unchecked, 0.6s Time] [2021-12-06 17:29:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-06 17:29:20,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2021-12-06 17:29:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 294 states have (on average 1.6734693877551021) internal successors, (492), 400 states have internal predecessors, (492), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:29:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 548 transitions. [2021-12-06 17:29:20,701 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 548 transitions. Word has length 43 [2021-12-06 17:29:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:20,702 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 548 transitions. [2021-12-06 17:29:20,702 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) [2021-12-06 17:29:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 548 transitions. [2021-12-06 17:29:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 17:29:20,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:20,702 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] [2021-12-06 17:29:20,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-12-06 17:29:20,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:29:20,903 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)] === [2021-12-06 17:29:20,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash 192642118, now seen corresponding path program 1 times [2021-12-06 17:29:20,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:29:20,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756648472] [2021-12-06 17:29:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:20,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:29:20,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:29:20,907 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:29:20,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-12-06 17:29:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:21,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:29:21,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:29:21,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:29:21,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:29:21,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756648472] [2021-12-06 17:29:21,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756648472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:21,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:29:21,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:29:21,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383426939] [2021-12-06 17:29:21,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:21,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:29:21,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:29:21,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:29:21,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:29:21,072 INFO L87 Difference]: Start difference. First operand 440 states and 548 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) [2021-12-06 17:29:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:21,109 INFO L93 Difference]: Finished difference Result 490 states and 602 transitions. [2021-12-06 17:29:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:29:21,109 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 [2021-12-06 17:29:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:21,111 INFO L225 Difference]: With dead ends: 490 [2021-12-06 17:29:21,111 INFO L226 Difference]: Without dead ends: 490 [2021-12-06 17:29:21,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:29:21,112 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 [2021-12-06 17:29:21,112 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] [2021-12-06 17:29:21,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-12-06 17:29:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 438. [2021-12-06 17:29:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 292 states have (on average 1.6746575342465753) internal successors, (489), 398 states have internal predecessors, (489), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:29:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 545 transitions. [2021-12-06 17:29:21,120 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 545 transitions. Word has length 43 [2021-12-06 17:29:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:21,121 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 545 transitions. [2021-12-06 17:29:21,121 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) [2021-12-06 17:29:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 545 transitions. [2021-12-06 17:29:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 17:29:21,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:21,121 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] [2021-12-06 17:29:21,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2021-12-06 17:29:21,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:29:21,323 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)] === [2021-12-06 17:29:21,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380693, now seen corresponding path program 1 times [2021-12-06 17:29:21,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:29:21,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598767642] [2021-12-06 17:29:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:21,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:29:21,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:29:21,328 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:29:21,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-12-06 17:29:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:21,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 17:29:21,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:21,623 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:29:21,623 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 [2021-12-06 17:29:21,716 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:29:21,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 17:29:21,866 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:29:21,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 17:29:22,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2021-12-06 17:29:22,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 17:29:22,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 17:29:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:29:22,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:29:22,744 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:29:22,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598767642] [2021-12-06 17:29:22,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598767642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:29:22,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1685816620] [2021-12-06 17:29:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:22,745 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:29:22,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:29:22,745 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:29:22,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2021-12-06 17:29:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:22,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 17:29:22,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:22,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:29:22,989 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:29:22,990 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 [2021-12-06 17:29:23,083 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:29:23,084 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 [2021-12-06 17:29:23,409 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 17:29:23,409 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 32 treesize of output 49 [2021-12-06 17:29:24,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2021-12-06 17:29:24,317 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-12-06 17:29:24,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 70 [2021-12-06 17:29:25,107 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 17:29:25,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 90 [2021-12-06 17:29:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:29:25,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:29:29,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1685816620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:29:29,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:29:29,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 21 [2021-12-06 17:29:29,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476661262] [2021-12-06 17:29:29,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:29:29,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 17:29:29,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:29:29,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 17:29:29,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2021-12-06 17:29:29,239 INFO L87 Difference]: Start difference. First operand 438 states and 545 transitions. Second operand has 23 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 17:29:32,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:32,109 INFO L93 Difference]: Finished difference Result 440 states and 548 transitions. [2021-12-06 17:29:32,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:29:32,110 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 43 [2021-12-06 17:29:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:32,111 INFO L225 Difference]: With dead ends: 440 [2021-12-06 17:29:32,111 INFO L226 Difference]: Without dead ends: 440 [2021-12-06 17:29:32,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 16 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=265, Invalid=856, Unknown=1, NotChecked=0, Total=1122 [2021-12-06 17:29:32,112 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 13 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:32,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1229 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 507 Invalid, 0 Unknown, 202 Unchecked, 0.8s Time] [2021-12-06 17:29:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-12-06 17:29:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2021-12-06 17:29:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 294 states have (on average 1.6734693877551021) internal successors, (492), 400 states have internal predecessors, (492), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:29:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 548 transitions. [2021-12-06 17:29:32,118 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 548 transitions. Word has length 43 [2021-12-06 17:29:32,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:32,118 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 548 transitions. [2021-12-06 17:29:32,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 17:29:32,118 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 548 transitions. [2021-12-06 17:29:32,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 17:29:32,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:32,118 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] [2021-12-06 17:29:32,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2021-12-06 17:29:32,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2021-12-06 17:29:32,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:29:32,520 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)] === [2021-12-06 17:29:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:32,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380694, now seen corresponding path program 1 times [2021-12-06 17:29:32,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:29:32,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795748744] [2021-12-06 17:29:32,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:32,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:29:32,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:29:32,526 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:29:32,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-12-06 17:29:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:32,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 17:29:32,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:34,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:29:34,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:29:36,919 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:29:36,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 17:29:45,236 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:29:45,236 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 [2021-12-06 17:29:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 15 refuted. 4 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:29:46,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:29:47,293 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:29:47,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795748744] [2021-12-06 17:29:47,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795748744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:29:47,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [787746111] [2021-12-06 17:29:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:47,294 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:29:47,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:29:47,294 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:29:47,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2021-12-06 17:29:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:47,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 17:29:47,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:47,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:29:47,633 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:29:47,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 17:29:47,659 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:29:47,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-06 17:29:47,962 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:29:47,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 17:29:47,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:29:48,218 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:29:48,218 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 12 treesize of output 18 [2021-12-06 17:29:48,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:29:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 2 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:29:49,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:29:49,367 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 34 treesize of output 32 [2021-12-06 17:29:50,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [787746111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:29:50,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:29:50,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 23 [2021-12-06 17:29:50,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660678562] [2021-12-06 17:29:50,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:29:50,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 17:29:50,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:29:50,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 17:29:50,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=853, Unknown=6, NotChecked=0, Total=1056 [2021-12-06 17:29:50,094 INFO L87 Difference]: Start difference. First operand 440 states and 548 transitions. Second operand has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:29:56,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:56,512 INFO L93 Difference]: Finished difference Result 440 states and 547 transitions. [2021-12-06 17:29:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:29:56,513 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 43 [2021-12-06 17:29:56,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:56,515 INFO L225 Difference]: With dead ends: 440 [2021-12-06 17:29:56,515 INFO L226 Difference]: Without dead ends: 440 [2021-12-06 17:29:56,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=329, Invalid=1469, Unknown=8, NotChecked=0, Total=1806 [2021-12-06 17:29:56,516 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 21 mSDsluCounter, 2599 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 997 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:56,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2908 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 873 Invalid, 0 Unknown, 997 Unchecked, 1.8s Time] [2021-12-06 17:29:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-12-06 17:29:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2021-12-06 17:29:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 294 states have (on average 1.6700680272108843) internal successors, (491), 400 states have internal predecessors, (491), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:29:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 547 transitions. [2021-12-06 17:29:56,522 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 547 transitions. Word has length 43 [2021-12-06 17:29:56,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:56,522 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 547 transitions. [2021-12-06 17:29:56,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:29:56,522 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 547 transitions. [2021-12-06 17:29:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 17:29:56,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:56,523 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] [2021-12-06 17:29:56,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (68)] Ended with exit code 0 [2021-12-06 17:29:56,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (69)] Ended with exit code 0 [2021-12-06 17:29:56,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:29:56,924 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)] === [2021-12-06 17:29:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:56,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659867, now seen corresponding path program 1 times [2021-12-06 17:29:56,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:29:56,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547503303] [2021-12-06 17:29:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:56,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:29:56,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:29:56,929 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:29:56,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-12-06 17:29:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:29:57,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:57,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:29:57,149 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:29:57,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 17:29:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 17:29:57,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:29:57,162 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:29:57,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547503303] [2021-12-06 17:29:57,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547503303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:57,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:29:57,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:29:57,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274970] [2021-12-06 17:29:57,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:57,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:29:57,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:29:57,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:29:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:29:57,163 INFO L87 Difference]: Start difference. First operand 440 states and 547 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 17:29:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:57,424 INFO L93 Difference]: Finished difference Result 439 states and 546 transitions. [2021-12-06 17:29:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:29:57,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2021-12-06 17:29:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:57,426 INFO L225 Difference]: With dead ends: 439 [2021-12-06 17:29:57,426 INFO L226 Difference]: Without dead ends: 439 [2021-12-06 17:29:57,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:29:57,427 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 0 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:57,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 736 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2021-12-06 17:29:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-06 17:29:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2021-12-06 17:29:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 294 states have (on average 1.6666666666666667) internal successors, (490), 399 states have internal predecessors, (490), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:29:57,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 546 transitions. [2021-12-06 17:29:57,432 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 546 transitions. Word has length 44 [2021-12-06 17:29:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:57,433 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 546 transitions. [2021-12-06 17:29:57,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 17:29:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 546 transitions. [2021-12-06 17:29:57,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 17:29:57,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:57,433 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] [2021-12-06 17:29:57,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2021-12-06 17:29:57,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:29:57,634 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)] === [2021-12-06 17:29:57,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:57,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659868, now seen corresponding path program 1 times [2021-12-06 17:29:57,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:29:57,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947045511] [2021-12-06 17:29:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:57,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:29:57,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:29:57,639 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:29:57,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-12-06 17:29:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:57,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:29:57,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:57,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:29:57,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:29:57,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 17:29:57,885 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:29:57,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 17:29:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:29:57,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:29:58,146 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 17:29:58,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 17:30:00,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:30:00,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2021-12-06 17:30:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:30:01,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:30:01,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947045511] [2021-12-06 17:30:01,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947045511] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:30:01,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:30:01,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-12-06 17:30:01,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235695516] [2021-12-06 17:30:01,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:30:01,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:30:01,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:30:01,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:30:01,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=122, Unknown=1, NotChecked=0, Total=156 [2021-12-06 17:30:01,068 INFO L87 Difference]: Start difference. First operand 439 states and 546 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) [2021-12-06 17:30:02,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:30:02,188 INFO L93 Difference]: Finished difference Result 438 states and 545 transitions. [2021-12-06 17:30:02,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:30:02,189 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 [2021-12-06 17:30:02,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:30:02,191 INFO L225 Difference]: With dead ends: 438 [2021-12-06 17:30:02,191 INFO L226 Difference]: Without dead ends: 438 [2021-12-06 17:30:02,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=42, Invalid=139, Unknown=1, NotChecked=0, Total=182 [2021-12-06 17:30:02,191 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 262 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:30:02,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 1727 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 279 Invalid, 0 Unknown, 192 Unchecked, 1.1s Time] [2021-12-06 17:30:02,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-12-06 17:30:02,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2021-12-06 17:30:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 294 states have (on average 1.663265306122449) internal successors, (489), 398 states have internal predecessors, (489), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:30:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 545 transitions. [2021-12-06 17:30:02,196 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 545 transitions. Word has length 44 [2021-12-06 17:30:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:30:02,197 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 545 transitions. [2021-12-06 17:30:02,197 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) [2021-12-06 17:30:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 545 transitions. [2021-12-06 17:30:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 17:30:02,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:30:02,197 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] [2021-12-06 17:30:02,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2021-12-06 17:30:02,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:30:02,398 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)] === [2021-12-06 17:30:02,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:30:02,399 INFO L85 PathProgramCache]: Analyzing trace with hash 248981415, now seen corresponding path program 1 times [2021-12-06 17:30:02,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:30:02,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31882075] [2021-12-06 17:30:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:30:02,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:30:02,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:30:02,403 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:30:02,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-12-06 17:30:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:02,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:30:02,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:30:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 17:30:02,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:30:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:30:03,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:30:03,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31882075] [2021-12-06 17:30:03,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31882075] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:30:03,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:30:03,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-06 17:30:03,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712696693] [2021-12-06 17:30:03,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:30:03,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:30:03,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:30:03,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:30:03,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:30:03,068 INFO L87 Difference]: Start difference. First operand 438 states and 545 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) [2021-12-06 17:30:03,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:30:03,280 INFO L93 Difference]: Finished difference Result 557 states and 619 transitions. [2021-12-06 17:30:03,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:30:03,280 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 [2021-12-06 17:30:03,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:30:03,283 INFO L225 Difference]: With dead ends: 557 [2021-12-06 17:30:03,283 INFO L226 Difference]: Without dead ends: 557 [2021-12-06 17:30:03,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:30:03,283 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 300 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:30:03,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 1776 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 147 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2021-12-06 17:30:03,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-12-06 17:30:03,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 440. [2021-12-06 17:30:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 296 states have (on average 1.6587837837837838) internal successors, (491), 400 states have internal predecessors, (491), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2021-12-06 17:30:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 547 transitions. [2021-12-06 17:30:03,289 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 547 transitions. Word has length 45 [2021-12-06 17:30:03,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:30:03,289 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 547 transitions. [2021-12-06 17:30:03,289 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) [2021-12-06 17:30:03,289 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 547 transitions. [2021-12-06 17:30:03,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 17:30:03,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:30:03,290 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] [2021-12-06 17:30:03,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-12-06 17:30:03,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:30:03,491 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)] === [2021-12-06 17:30:03,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:30:03,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1709262998, now seen corresponding path program 1 times [2021-12-06 17:30:03,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:30:03,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59095522] [2021-12-06 17:30:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:30:03,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:30:03,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:30:03,496 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:30:03,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-12-06 17:30:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:03,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 17:30:03,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:30:03,837 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 17:30:03,837 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 17 treesize of output 22 [2021-12-06 17:30:04,037 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-06 17:30:04,037 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 28 treesize of output 30 [2021-12-06 17:30:04,171 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:30:04,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 17:30:04,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:30:04,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 17:30:04,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:30:07,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 17:30:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:30:07,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:30:07,758 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-06 17:30:07,759 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 68 treesize of output 67 [2021-12-06 17:30:07,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:30:07,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59095522] [2021-12-06 17:30:07,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59095522] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:30:07,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2099691373] [2021-12-06 17:30:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:30:07,963 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:30:07,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:30:07,964 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:30:07,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2021-12-06 17:30:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:08,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:30:08,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:30:11,491 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:30:11,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 23 [2021-12-06 17:30:11,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:30:11,809 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 26 [2021-12-06 17:30:12,044 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:30:12,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-06 17:30:12,049 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 17:30:12,049 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 13 treesize of output 7 [2021-12-06 17:30:12,236 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:30:12,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 17:30:12,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:30:12,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 17:30:12,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:30:12,639 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 17:30:12,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 15 [2021-12-06 17:30:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:30:12,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:30:12,820 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-06 17:30:12,820 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 66 treesize of output 65 [2021-12-06 17:30:12,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2099691373] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:30:12,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:30:12,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-12-06 17:30:12,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058336221] [2021-12-06 17:30:12,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:30:12,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 17:30:12,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:30:12,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 17:30:12,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=959, Unknown=5, NotChecked=0, Total=1122 [2021-12-06 17:30:12,965 INFO L87 Difference]: Start difference. First operand 440 states and 547 transitions. Second operand has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:30:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:30:20,624 INFO L93 Difference]: Finished difference Result 472 states and 581 transitions. [2021-12-06 17:30:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:30:20,625 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 45 [2021-12-06 17:30:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:30:20,626 INFO L225 Difference]: With dead ends: 472 [2021-12-06 17:30:20,627 INFO L226 Difference]: Without dead ends: 472 [2021-12-06 17:30:20,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=252, Invalid=1463, Unknown=7, NotChecked=0, Total=1722 [2021-12-06 17:30:20,627 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 329 mSDsluCounter, 3481 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 3794 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 891 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:30:20,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 3794 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1013 Invalid, 0 Unknown, 891 Unchecked, 3.0s Time] [2021-12-06 17:30:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-06 17:30:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 458. [2021-12-06 17:30:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 314 states have (on average 1.6687898089171975) internal successors, (524), 418 states have internal predecessors, (524), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-06 17:30:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 579 transitions. [2021-12-06 17:30:20,632 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 579 transitions. Word has length 45 [2021-12-06 17:30:20,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:30:20,633 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 579 transitions. [2021-12-06 17:30:20,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:30:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 579 transitions. [2021-12-06 17:30:20,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 17:30:20,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:30:20,633 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] [2021-12-06 17:30:20,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2021-12-06 17:30:20,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2021-12-06 17:30:21,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:30:21,035 INFO L402 AbstractCegarLoop]: === Iteration 59 === 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)] === [2021-12-06 17:30:21,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:30:21,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1709262999, now seen corresponding path program 1 times [2021-12-06 17:30:21,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:30:21,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792174397] [2021-12-06 17:30:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:30:21,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:30:21,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:30:21,039 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:30:21,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-12-06 17:30:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:21,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 17:30:21,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:30:21,488 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:30:21,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 17:30:21,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:30:21,524 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:30:21,525 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 14 treesize of output 20 [2021-12-06 17:30:21,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:30:21,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:30:21,946 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 17:30:21,946 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 23 treesize of output 26 [2021-12-06 17:30:21,981 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 17:30:21,981 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 23 treesize of output 26 [2021-12-06 17:30:22,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:30:23,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:30:23,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:30:23,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-12-06 17:30:23,962 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 17:30:23,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-12-06 17:30:23,980 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:30:23,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 17:30:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:30:24,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:30:24,471 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 26 treesize of output 24 [2021-12-06 17:30:25,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:30:25,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 141 [2021-12-06 17:30:27,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:30:27,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792174397] [2021-12-06 17:30:27,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792174397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:30:27,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [610178989] [2021-12-06 17:30:27,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:30:27,227 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:30:27,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:30:27,228 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:30:27,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2021-12-06 17:30:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:27,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 17:30:27,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:30:27,960 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:30:27,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-06 17:30:27,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:30:27,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 17:30:27,995 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:30:27,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 17:30:28,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:30:28,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:30:28,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:30:28,543 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 17:30:28,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 39 [2021-12-06 17:30:28,568 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 17:30:28,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-12-06 17:30:28,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:30:31,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:30:31,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:30:31,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 32 [2021-12-06 17:30:31,796 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 17:30:31,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-12-06 17:30:31,813 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:30:31,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 17:30:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:30:31,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:30:32,043 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 26 treesize of output 24 [2021-12-06 17:30:32,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:30:32,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 141 [2021-12-06 17:30:34,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [610178989] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:30:34,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:30:34,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2021-12-06 17:30:34,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766164459] [2021-12-06 17:30:34,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:30:34,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 17:30:34,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:30:34,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 17:30:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 17:30:34,230 INFO L87 Difference]: Start difference. First operand 458 states and 579 transitions. Second operand has 30 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:30:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:30:36,963 INFO L93 Difference]: Finished difference Result 460 states and 581 transitions. [2021-12-06 17:30:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:30:36,964 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2021-12-06 17:30:36,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:30:36,966 INFO L225 Difference]: With dead ends: 460 [2021-12-06 17:30:36,966 INFO L226 Difference]: Without dead ends: 460 [2021-12-06 17:30:36,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 78 SyntacticMatches, 24 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 17:30:36,966 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 25 mSDsluCounter, 3555 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3863 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1093 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:30:36,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 3863 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 500 Invalid, 0 Unknown, 1093 Unchecked, 1.6s Time] [2021-12-06 17:30:36,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-06 17:30:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2021-12-06 17:30:36,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 316 states have (on average 1.6645569620253164) internal successors, (526), 420 states have internal predecessors, (526), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-06 17:30:36,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 581 transitions. [2021-12-06 17:30:36,973 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 581 transitions. Word has length 45 [2021-12-06 17:30:36,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:30:36,973 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 581 transitions. [2021-12-06 17:30:36,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 17:30:36,973 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 581 transitions. [2021-12-06 17:30:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 17:30:36,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:30:36,974 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, 1] [2021-12-06 17:30:36,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (76)] Ended with exit code 0 [2021-12-06 17:30:37,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2021-12-06 17:30:37,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:30:37,374 INFO L402 AbstractCegarLoop]: === Iteration 60 === 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)] === [2021-12-06 17:30:37,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:30:37,375 INFO L85 PathProgramCache]: Analyzing trace with hash -871510309, now seen corresponding path program 1 times [2021-12-06 17:30:37,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:30:37,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609818949] [2021-12-06 17:30:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:30:37,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:30:37,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:30:37,376 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:30:37,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-12-06 17:30:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:37,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:30:37,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:30:37,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:30:37,583 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:30:37,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-06 17:30:37,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-06 17:30:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:30:37,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:30:37,844 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:30:37,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609818949] [2021-12-06 17:30:37,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609818949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:30:37,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1179363787] [2021-12-06 17:30:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:30:37,845 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:30:37,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:30:37,846 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:30:37,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2021-12-06 17:30:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:38,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 17:30:38,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:30:38,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:30:38,115 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:30:38,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-06 17:30:38,254 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:30:38,255 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 39 treesize of output 48 [2021-12-06 17:30:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:30:38,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:30:38,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1179363787] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:30:38,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:30:38,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-06 17:30:38,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847273808] [2021-12-06 17:30:38,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:30:38,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:30:38,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:30:38,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:30:38,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:30:38,362 INFO L87 Difference]: Start difference. First operand 460 states and 581 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:30:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:30:39,693 INFO L93 Difference]: Finished difference Result 464 states and 585 transitions. [2021-12-06 17:30:39,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:30:39,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2021-12-06 17:30:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:30:39,696 INFO L225 Difference]: With dead ends: 464 [2021-12-06 17:30:39,696 INFO L226 Difference]: Without dead ends: 464 [2021-12-06 17:30:39,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:30:39,696 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 46 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:30:39,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1141 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 548 Invalid, 0 Unknown, 208 Unchecked, 1.3s Time] [2021-12-06 17:30:39,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-12-06 17:30:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 460. [2021-12-06 17:30:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 316 states have (on average 1.6613924050632911) internal successors, (525), 420 states have internal predecessors, (525), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-06 17:30:39,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 580 transitions. [2021-12-06 17:30:39,702 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 580 transitions. Word has length 46 [2021-12-06 17:30:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:30:39,702 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 580 transitions. [2021-12-06 17:30:39,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 17:30:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 580 transitions. [2021-12-06 17:30:39,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 17:30:39,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:30:39,703 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, 1, 1] [2021-12-06 17:30:39,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (78)] Forceful destruction successful, exit code 0 [2021-12-06 17:30:39,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (77)] Ended with exit code 0 [2021-12-06 17:30:40,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:30:40,104 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:30:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:30:40,105 INFO L85 PathProgramCache]: Analyzing trace with hash -813633540, now seen corresponding path program 1 times [2021-12-06 17:30:40,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:30:40,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449479630] [2021-12-06 17:30:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:30:40,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:30:40,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:30:40,109 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:30:40,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-12-06 17:30:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:40,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 17:30:40,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:30:40,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:30:40,354 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:30:40,354 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 [2021-12-06 17:30:40,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:30:42,416 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_90| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_39| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_90| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_90|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_39|)))) is different from true [2021-12-06 17:30:42,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:30:42,504 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:30:42,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2021-12-06 17:30:42,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-12-06 17:30:48,672 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 17:30:48,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 38 [2021-12-06 17:30:48,756 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 17:30:48,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 33 [2021-12-06 17:30:48,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-12-06 17:30:52,946 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 17:30:52,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 63 [2021-12-06 17:30:53,195 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 17:30:53,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2021-12-06 17:30:53,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-12-06 17:30:53,349 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-12-06 17:30:53,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 42 [2021-12-06 17:30:53,463 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 28 treesize of output 16 [2021-12-06 17:30:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 14 not checked. [2021-12-06 17:30:53,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:30:53,959 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1420 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| (_ BitVec 32)) (v_ArrVal_1421 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg v_ArrVal_1421))) (_ bv1 1)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| v_ArrVal_1421) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1420) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))))))) (_ bv1 1))))) is different from false [2021-12-06 17:30:53,980 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1420 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1419 (_ BitVec 32)) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| (_ BitVec 32)) (v_ArrVal_1421 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| v_ArrVal_1421) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1419)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1420) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg v_ArrVal_1421))) (_ bv1 1)))))) is different from false [2021-12-06 17:30:54,016 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1420 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1419 (_ BitVec 32)) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| (_ BitVec 32)) (v_ArrVal_1421 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| v_ArrVal_1421) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1419)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1420) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg v_ArrVal_1421))) (_ bv1 1)))))) is different from false [2021-12-06 17:30:54,105 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_410| (_ BitVec 32)) (v_ArrVal_1420 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1419 (_ BitVec 32)) (v_ArrVal_1424 (_ BitVec 1)) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| (_ BitVec 32)) (v_ArrVal_1421 (_ BitVec 1))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_410|))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg v_ArrVal_1421))) (_ bv1 1)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| |v_ldv_malloc_#res.base_410| v_ArrVal_1424) |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| v_ArrVal_1421) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1419)) |v_ldv_malloc_#res.base_410| v_ArrVal_1420) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))))))))) (_ bv1 1))))) is different from false [2021-12-06 17:30:54,108 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:30:54,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449479630] [2021-12-06 17:30:54,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449479630] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:30:54,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [161557027] [2021-12-06 17:30:54,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:30:54,108 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:30:54,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:30:54,109 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:30:54,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2021-12-06 17:30:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:54,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 17:30:54,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:30:54,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:30:54,715 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:30:54,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 17:30:54,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:30:56,929 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_94| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_94| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_94|) (_ bv0 32))))) is different from true [2021-12-06 17:30:57,055 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:30:57,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2021-12-06 17:30:57,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-06 17:31:13,471 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 17:31:13,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 38 [2021-12-06 17:31:13,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:31:13,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2021-12-06 17:31:13,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-06 17:31:23,943 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 17:31:23,943 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 35 treesize of output 56 [2021-12-06 17:31:24,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:31:24,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 35 [2021-12-06 17:31:24,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-12-06 17:31:24,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:31:24,895 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-12-06 17:31:24,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 53 [2021-12-06 17:31:25,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-12-06 17:31:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 14 not checked. [2021-12-06 17:31:25,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:31:27,398 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13| (_ BitVec 32)) (v_ArrVal_1478 (_ BitVec 1)) (v_ArrVal_1477 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1478)) (_ bv1 1)))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13|)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13| v_ArrVal_1478) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1477) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))))) (_ bv1 1))))) is different from false [2021-12-06 17:31:27,446 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1476 (_ BitVec 32)) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13| (_ BitVec 32)) (v_ArrVal_1478 (_ BitVec 1)) (v_ArrVal_1477 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1478)) (_ bv1 1)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13| v_ArrVal_1478) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1476)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1477) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))))) (_ bv1 1))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13|)))) is different from false [2021-12-06 17:31:27,534 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1476 (_ BitVec 32)) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13| (_ BitVec 32)) (v_ArrVal_1478 (_ BitVec 1)) (v_ArrVal_1477 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1478)) (_ bv1 1)))) (= (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13| v_ArrVal_1478) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1476)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1477) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))))))))) (_ bv1 1)) (_ bv0 1)) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13|)))) is different from false [2021-12-06 17:31:27,669 WARN L838 $PredicateComparison]: unable to prove that (forall ((|#StackHeapBarrier| (_ BitVec 32)) (v_ArrVal_1476 (_ BitVec 32)) (|v_ldv_malloc_#res.base_413| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13| (_ BitVec 32)) (v_ArrVal_1478 (_ BitVec 1)) (v_ArrVal_1477 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1478)) (_ bv1 1)))) (not (bvult |v_ldv_malloc_#res.base_413| |#StackHeapBarrier|)) (not (= (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_413|)))) (_ bv0 1))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| |v_ldv_malloc_#res.base_413| (_ bv1 1)) |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13| v_ArrVal_1478) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1476)) |v_ldv_malloc_#res.base_413| v_ArrVal_1477) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))))))))))) (_ bv1 1))) (not (bvult |#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13|)))) is different from false [2021-12-06 17:31:27,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [161557027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:31:27,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:31:27,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-12-06 17:31:27,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850753761] [2021-12-06 17:31:27,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:31:27,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 17:31:27,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:31:27,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 17:31:27,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1641, Unknown=17, NotChecked=910, Total=2756 [2021-12-06 17:31:27,673 INFO L87 Difference]: Start difference. First operand 460 states and 580 transitions. Second operand has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 34 states have internal predecessors, (66), 9 states have call successors, (9), 6 states have call predecessors, (9), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-06 17:31:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:31:46,710 INFO L93 Difference]: Finished difference Result 463 states and 584 transitions. [2021-12-06 17:31:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:31:46,711 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 34 states have internal predecessors, (66), 9 states have call successors, (9), 6 states have call predecessors, (9), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 46 [2021-12-06 17:31:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:31:46,712 INFO L225 Difference]: With dead ends: 463 [2021-12-06 17:31:46,712 INFO L226 Difference]: Without dead ends: 463 [2021-12-06 17:31:46,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=223, Invalid=1962, Unknown=17, NotChecked=990, Total=3192 [2021-12-06 17:31:46,713 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 51 mSDsluCounter, 4314 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 4607 SdHoareTripleChecker+Invalid, 3415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2102 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:31:46,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 4607 Invalid, 3415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1292 Invalid, 0 Unknown, 2102 Unchecked, 2.7s Time] [2021-12-06 17:31:46,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-12-06 17:31:46,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 459. [2021-12-06 17:31:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 316 states have (on average 1.6582278481012658) internal successors, (524), 419 states have internal predecessors, (524), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-06 17:31:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 579 transitions. [2021-12-06 17:31:46,719 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 579 transitions. Word has length 46 [2021-12-06 17:31:46,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:31:46,719 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 579 transitions. [2021-12-06 17:31:46,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 34 states have internal predecessors, (66), 9 states have call successors, (9), 6 states have call predecessors, (9), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-06 17:31:46,719 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 579 transitions. [2021-12-06 17:31:46,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 17:31:46,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:31:46,720 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, 1, 1] [2021-12-06 17:31:46,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2021-12-06 17:31:46,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (80)] Ended with exit code 0 [2021-12-06 17:31:47,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:31:47,121 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:31:47,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:31:47,122 INFO L85 PathProgramCache]: Analyzing trace with hash -813633539, now seen corresponding path program 1 times [2021-12-06 17:31:47,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:31:47,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878108141] [2021-12-06 17:31:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:47,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:31:47,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:31:47,125 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:31:47,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-12-06 17:31:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:47,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 17:31:47,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:31:47,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:31:47,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:31:47,528 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:31:47,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-06 17:31:47,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:31:47,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:31:47,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-12-06 17:31:47,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:31:48,051 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 17:31:48,051 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 45 treesize of output 62 [2021-12-06 17:31:48,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:31:48,221 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:31:48,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 68 [2021-12-06 17:31:48,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 17:31:48,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:31:48,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-12-06 17:31:48,577 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 17:31:48,577 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 46 treesize of output 67 [2021-12-06 17:31:48,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:31:48,753 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 17:31:48,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 17:31:48,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:31:48,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 38 [2021-12-06 17:31:48,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:31:48,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-12-06 17:31:49,031 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-06 17:31:49,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-06 17:31:49,069 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 17:31:49,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-12-06 17:31:49,332 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 17:31:49,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 33 [2021-12-06 17:31:49,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:31:49,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 17:31:49,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-12-06 17:31:49,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 17:31:49,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:31:49,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:31:49,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:31:49,564 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 32 treesize of output 16 [2021-12-06 17:31:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:31:49,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:31:50,534 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14| (_ BitVec 32))) (or (and (forall ((v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_1546 (_ BitVec 32)) (v_ArrVal_1544 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|) (_ bv4 32)) (select (store |c_#length| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14| v_ArrVal_1546) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1544) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14|)))) is different from false [2021-12-06 17:31:50,634 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14| (_ BitVec 32))) (or (and (forall ((v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1541 (_ BitVec 32))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1541)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1542 (_ BitVec 32)) (v_ArrVal_1546 (_ BitVec 32)) (v_ArrVal_1544 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1541 (_ BitVec 32))) (let ((.cse1 (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse1 v_ArrVal_1541)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14| v_ArrVal_1546) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse1 v_ArrVal_1542)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1544) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14|)))) is different from false [2021-12-06 17:31:50,781 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14| (_ BitVec 32))) (or (and (forall ((v_ArrVal_1542 (_ BitVec 32)) (v_ArrVal_1546 (_ BitVec 32)) (v_ArrVal_1544 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1541 (_ BitVec 32))) (let ((.cse0 (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse0 v_ArrVal_1541)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14| v_ArrVal_1546) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse0 v_ArrVal_1542)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1544) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))) (forall ((v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1541 (_ BitVec 32))) (let ((.cse1 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1541)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14|)))) is different from false [2021-12-06 17:31:51,195 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_416| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_416|))) (and (forall ((v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1541 (_ BitVec 32))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1541)) |v_ldv_malloc_#res.base_416| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1542 (_ BitVec 32)) (v_ArrVal_1546 (_ BitVec 32)) (v_ArrVal_1549 (_ BitVec 32)) (v_ArrVal_1544 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1545 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1541 (_ BitVec 32))) (let ((.cse1 (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse1 v_ArrVal_1541)) |v_ldv_malloc_#res.base_416| v_ArrVal_1545) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (select (store (store |c_#length| |v_ldv_malloc_#res.base_416| v_ArrVal_1549) |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14| v_ArrVal_1546) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse1 v_ArrVal_1542)) |v_ldv_malloc_#res.base_416| v_ArrVal_1544) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14|)))) is different from false [2021-12-06 17:31:51,202 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:31:51,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878108141] [2021-12-06 17:31:51,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878108141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:31:51,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1075285887] [2021-12-06 17:31:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:31:51,202 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:31:51,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:31:51,203 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:31:51,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2021-12-06 17:31:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:31:51,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-06 17:31:51,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:31:51,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:31:51,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:31:51,952 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:31:51,953 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 37 [2021-12-06 17:31:52,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:31:52,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:31:52,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-12-06 17:31:52,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:31:56,748 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 17:31:56,748 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 37 treesize of output 54 [2021-12-06 17:31:56,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:31:56,975 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 17:31:56,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 61 [2021-12-06 17:31:56,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 17:31:57,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-12-06 17:31:57,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:31:59,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:31:59,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:31:59,558 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 17:31:59,558 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 45 treesize of output 66 [2021-12-06 17:31:59,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:31:59,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 44 [2021-12-06 17:31:59,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:31:59,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 17:32:00,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-12-06 17:32:00,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:32:00,888 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-06 17:32:00,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-06 17:32:00,973 INFO L354 Elim1Store]: treesize reduction 57, result has 44.1 percent of original size [2021-12-06 17:32:00,973 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 56 treesize of output 87 [2021-12-06 17:32:02,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:32:02,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 17:32:02,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:32:02,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 46 [2021-12-06 17:32:02,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 52 [2021-12-06 17:32:02,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 17:32:03,287 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-12-06 17:32:03,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 59 [2021-12-06 17:32:03,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:32:03,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 17:32:03,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:32:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:32:03,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:32:07,548 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ BitVec 32))) (or (and (forall ((v_ArrVal_1611 (_ BitVec 32)) (v_ArrVal_1616 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1613 (_ BitVec 32)) (v_ArrVal_1617 (_ BitVec 32)) (v_ArrVal_1615 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse0 v_ArrVal_1613)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1616) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| v_ArrVal_1617) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse0 v_ArrVal_1611)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1615) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))))) (forall ((v_ArrVal_1616 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1613 (_ BitVec 32))) (let ((.cse1 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1613)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1616) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|))))) is different from false [2021-12-06 17:32:16,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1075285887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:32:16,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:32:16,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 39 [2021-12-06 17:32:16,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237713771] [2021-12-06 17:32:16,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:32:16,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 17:32:16,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:32:16,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 17:32:16,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2053, Unknown=34, NotChecked=480, Total=2756 [2021-12-06 17:32:16,653 INFO L87 Difference]: Start difference. First operand 459 states and 579 transitions. Second operand has 40 states, 38 states have (on average 1.631578947368421) internal successors, (62), 33 states have internal predecessors, (62), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-06 17:32:25,747 WARN L227 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 91 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:32:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:32:31,094 INFO L93 Difference]: Finished difference Result 460 states and 581 transitions. [2021-12-06 17:32:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:32:31,096 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.631578947368421) internal successors, (62), 33 states have internal predecessors, (62), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 46 [2021-12-06 17:32:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:32:31,097 INFO L225 Difference]: With dead ends: 460 [2021-12-06 17:32:31,097 INFO L226 Difference]: Without dead ends: 460 [2021-12-06 17:32:31,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=315, Invalid=3211, Unknown=34, NotChecked=600, Total=4160 [2021-12-06 17:32:31,098 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 23 mSDsluCounter, 3932 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4245 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1113 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:32:31,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 4245 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1922 Invalid, 0 Unknown, 1113 Unchecked, 3.8s Time] [2021-12-06 17:32:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-06 17:32:31,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 458. [2021-12-06 17:32:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 316 states have (on average 1.6550632911392404) internal successors, (523), 418 states have internal predecessors, (523), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-06 17:32:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 578 transitions. [2021-12-06 17:32:31,103 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 578 transitions. Word has length 46 [2021-12-06 17:32:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:32:31,103 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 578 transitions. [2021-12-06 17:32:31,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.631578947368421) internal successors, (62), 33 states have internal predecessors, (62), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-12-06 17:32:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 578 transitions. [2021-12-06 17:32:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 17:32:31,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:32:31,104 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, 1, 1, 1] [2021-12-06 17:32:31,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2021-12-06 17:32:31,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2021-12-06 17:32:31,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:32:31,505 INFO L402 AbstractCegarLoop]: === Iteration 63 === 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)] === [2021-12-06 17:32:31,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:32:31,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2770755, now seen corresponding path program 1 times [2021-12-06 17:32:31,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:32:31,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411814239] [2021-12-06 17:32:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:32:31,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:32:31,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:32:31,507 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:32:31,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2021-12-06 17:32:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:32:31,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:32:31,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:32:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 17:32:32,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:32:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:32:32,284 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:32:32,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411814239] [2021-12-06 17:32:32,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411814239] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:32:32,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:32:32,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-06 17:32:32,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138694795] [2021-12-06 17:32:32,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:32:32,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:32:32,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:32:32,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:32:32,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:32:32,285 INFO L87 Difference]: Start difference. First operand 458 states and 578 transitions. Second operand has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 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) [2021-12-06 17:32:32,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:32:32,298 INFO L93 Difference]: Finished difference Result 460 states and 580 transitions. [2021-12-06 17:32:32,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:32:32,298 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 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 48 [2021-12-06 17:32:32,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:32:32,299 INFO L225 Difference]: With dead ends: 460 [2021-12-06 17:32:32,299 INFO L226 Difference]: Without dead ends: 460 [2021-12-06 17:32:32,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:32:32,300 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 33 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:32:32,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1482 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 104 Unchecked, 0.0s Time] [2021-12-06 17:32:32,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-06 17:32:32,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 458. [2021-12-06 17:32:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 316 states have (on average 1.6518987341772151) internal successors, (522), 418 states have internal predecessors, (522), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-06 17:32:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 577 transitions. [2021-12-06 17:32:32,305 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 577 transitions. Word has length 48 [2021-12-06 17:32:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:32:32,306 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 577 transitions. [2021-12-06 17:32:32,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 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) [2021-12-06 17:32:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 577 transitions. [2021-12-06 17:32:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 17:32:32,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:32:32,306 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, 1, 1, 1] [2021-12-06 17:32:32,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (83)] Ended with exit code 0 [2021-12-06 17:32:32,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:32:32,508 INFO L402 AbstractCegarLoop]: === Iteration 64 === 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)] === [2021-12-06 17:32:32,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:32:32,509 INFO L85 PathProgramCache]: Analyzing trace with hash -477908374, now seen corresponding path program 1 times [2021-12-06 17:32:32,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:32:32,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549403513] [2021-12-06 17:32:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:32:32,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:32:32,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:32:32,513 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:32:32,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-12-06 17:32:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:32:32,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 17:32:32,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:32:32,826 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 17:32:32,826 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 14 treesize of output 19 [2021-12-06 17:32:33,039 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-06 17:32:33,040 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 23 treesize of output 25 [2021-12-06 17:32:33,175 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:32:33,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 17:32:33,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:32:33,212 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:32:33,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 17:32:33,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:32:33,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 17:32:33,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 17:32:33,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:32:37,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 17:32:37,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 17:32:37,072 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:32:37,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 17:32:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:32:37,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:32:37,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-06 17:32:37,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:32:37,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549403513] [2021-12-06 17:32:37,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549403513] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:32:37,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1871837656] [2021-12-06 17:32:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:32:37,620 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:32:37,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:32:37,621 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:32:37,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2021-12-06 17:32:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:32:37,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 17:32:37,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:32:41,343 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:32:41,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 23 [2021-12-06 17:32:41,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:32:41,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2021-12-06 17:32:41,925 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:32:41,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 17:32:41,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:32:41,957 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:32:41,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-06 17:32:41,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:32:41,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 17:32:42,214 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:32:42,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-06 17:32:42,243 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:32:42,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 17:32:42,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 17:32:42,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 17:32:42,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:32:42,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:32:42,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-12-06 17:32:42,790 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 26 treesize of output 18 [2021-12-06 17:32:42,799 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:32:42,800 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 15 treesize of output 15 [2021-12-06 17:32:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:32:42,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:32:42,886 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 26 treesize of output 24 [2021-12-06 17:32:43,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1871837656] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:32:43,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:32:43,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-12-06 17:32:43,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283347228] [2021-12-06 17:32:43,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:32:43,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 17:32:43,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:32:43,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 17:32:43,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=835, Unknown=5, NotChecked=0, Total=992 [2021-12-06 17:32:43,087 INFO L87 Difference]: Start difference. First operand 458 states and 577 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 22 states have internal predecessors, (65), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:32:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:32:50,380 INFO L93 Difference]: Finished difference Result 475 states and 582 transitions. [2021-12-06 17:32:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:32:50,381 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 22 states have internal predecessors, (65), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 48 [2021-12-06 17:32:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:32:50,382 INFO L225 Difference]: With dead ends: 475 [2021-12-06 17:32:50,382 INFO L226 Difference]: Without dead ends: 475 [2021-12-06 17:32:50,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=246, Invalid=1307, Unknown=7, NotChecked=0, Total=1560 [2021-12-06 17:32:50,383 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 343 mSDsluCounter, 2908 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 3219 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 529 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:32:50,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 3219 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1130 Invalid, 0 Unknown, 529 Unchecked, 2.7s Time] [2021-12-06 17:32:50,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-06 17:32:50,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 460. [2021-12-06 17:32:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 318 states have (on average 1.6477987421383649) internal successors, (524), 420 states have internal predecessors, (524), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-06 17:32:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 579 transitions. [2021-12-06 17:32:50,389 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 579 transitions. Word has length 48 [2021-12-06 17:32:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:32:50,389 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 579 transitions. [2021-12-06 17:32:50,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 22 states have internal predecessors, (65), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:32:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 579 transitions. [2021-12-06 17:32:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 17:32:50,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:32:50,390 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, 1, 1, 1, 1] [2021-12-06 17:32:50,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (84)] Ended with exit code 0 [2021-12-06 17:32:50,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (85)] Ended with exit code 0 [2021-12-06 17:32:50,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:32:50,791 INFO L402 AbstractCegarLoop]: === Iteration 65 === 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)] === [2021-12-06 17:32:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:32:50,792 INFO L85 PathProgramCache]: Analyzing trace with hash -85892980, now seen corresponding path program 1 times [2021-12-06 17:32:50,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:32:50,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073583092] [2021-12-06 17:32:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:32:50,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:32:50,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:32:50,796 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:32:50,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2021-12-06 17:32:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:32:51,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:32:51,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:32:51,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:32:51,293 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:32:51,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-06 17:32:51,437 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:32:51,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-12-06 17:32:51,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:32:51,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-06 17:32:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:32:51,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:32:51,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:32:51,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073583092] [2021-12-06 17:32:51,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073583092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:32:51,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [298701734] [2021-12-06 17:32:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:32:51,882 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:32:51,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:32:51,883 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:32:51,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2021-12-06 17:32:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:32:52,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:32:52,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:32:52,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:32:52,146 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:32:52,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 17:32:52,282 INFO L354 Elim1Store]: treesize reduction 4, result has 85.7 percent of original size [2021-12-06 17:32:52,283 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 48 treesize of output 66 [2021-12-06 17:32:52,608 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:32:52,609 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 87 treesize of output 96 [2021-12-06 17:32:52,734 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:32:52,734 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 37 treesize of output 46 [2021-12-06 17:32:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:32:52,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:32:52,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [298701734] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:32:52,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:32:52,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-12-06 17:32:52,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318260583] [2021-12-06 17:32:52,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:32:52,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 17:32:52,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:32:52,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 17:32:52,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=215, Unknown=2, NotChecked=0, Total=272 [2021-12-06 17:32:52,941 INFO L87 Difference]: Start difference. First operand 460 states and 579 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 13 states have internal predecessors, (53), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 17:32:54,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:32:54,224 INFO L93 Difference]: Finished difference Result 464 states and 583 transitions. [2021-12-06 17:32:54,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 17:32:54,225 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 13 states have internal predecessors, (53), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 49 [2021-12-06 17:32:54,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:32:54,226 INFO L225 Difference]: With dead ends: 464 [2021-12-06 17:32:54,226 INFO L226 Difference]: Without dead ends: 464 [2021-12-06 17:32:54,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 20 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=244, Unknown=2, NotChecked=0, Total=306 [2021-12-06 17:32:54,227 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 46 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:32:54,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 2046 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 500 Invalid, 0 Unknown, 401 Unchecked, 1.2s Time] [2021-12-06 17:32:54,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-12-06 17:32:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 460. [2021-12-06 17:32:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 318 states have (on average 1.6446540880503144) internal successors, (523), 420 states have internal predecessors, (523), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2021-12-06 17:32:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 578 transitions. [2021-12-06 17:32:54,232 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 578 transitions. Word has length 49 [2021-12-06 17:32:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:32:54,232 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 578 transitions. [2021-12-06 17:32:54,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 13 states have internal predecessors, (53), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 17:32:54,232 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 578 transitions. [2021-12-06 17:32:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 17:32:54,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:32:54,233 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, 1, 1, 1, 1, 1] [2021-12-06 17:32:54,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2021-12-06 17:32:54,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (86)] Ended with exit code 0 [2021-12-06 17:32:54,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:32:54,633 INFO L402 AbstractCegarLoop]: === Iteration 66 === 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)] === [2021-12-06 17:32:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:32:54,634 INFO L85 PathProgramCache]: Analyzing trace with hash 291532103, now seen corresponding path program 1 times [2021-12-06 17:32:54,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:32:54,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418495098] [2021-12-06 17:32:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:32:54,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:32:54,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:32:54,635 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:32:54,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2021-12-06 17:32:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:32:54,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 17:32:54,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:33:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 17:33:03,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:33:04,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:33:04,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418495098] [2021-12-06 17:33:04,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418495098] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:33:04,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1522665584] [2021-12-06 17:33:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:33:04,105 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:33:04,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:33:04,105 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:33:04,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2021-12-06 17:33:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:33:04,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 17:33:04,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:33:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:33:39,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:33:43,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1522665584] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:33:43,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:33:43,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-12-06 17:33:43,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177625327] [2021-12-06 17:33:43,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:33:43,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 17:33:43,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:33:43,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 17:33:43,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1254, Unknown=9, NotChecked=0, Total=1406 [2021-12-06 17:33:43,757 INFO L87 Difference]: Start difference. First operand 460 states and 578 transitions. Second operand has 30 states, 26 states have (on average 2.576923076923077) internal successors, (67), 24 states have internal predecessors, (67), 8 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:34:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:10,296 INFO L93 Difference]: Finished difference Result 469 states and 587 transitions. [2021-12-06 17:34:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:34:10,298 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.576923076923077) internal successors, (67), 24 states have internal predecessors, (67), 8 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 50 [2021-12-06 17:34:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:10,298 INFO L225 Difference]: With dead ends: 469 [2021-12-06 17:34:10,299 INFO L226 Difference]: Without dead ends: 447 [2021-12-06 17:34:10,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 63.4s TimeCoverageRelationStatistics Valid=255, Invalid=2380, Unknown=17, NotChecked=0, Total=2652 [2021-12-06 17:34:10,299 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 56 mSDsluCounter, 3282 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2008 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:10,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 3568 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 248 Invalid, 0 Unknown, 2008 Unchecked, 0.5s Time] [2021-12-06 17:34:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-06 17:34:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2021-12-06 17:34:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 302 states have (on average 1.6754966887417218) internal successors, (506), 404 states have internal predecessors, (506), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2021-12-06 17:34:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 560 transitions. [2021-12-06 17:34:10,304 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 560 transitions. Word has length 50 [2021-12-06 17:34:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:10,304 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 560 transitions. [2021-12-06 17:34:10,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.576923076923077) internal successors, (67), 24 states have internal predecessors, (67), 8 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 17:34:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 560 transitions. [2021-12-06 17:34:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:34:10,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:10,305 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:10,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (89)] Forceful destruction successful, exit code 0 [2021-12-06 17:34:10,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (88)] Ended with exit code 0 [2021-12-06 17:34:10,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:34:10,707 INFO L402 AbstractCegarLoop]: === Iteration 67 === 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)] === [2021-12-06 17:34:10,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:10,708 INFO L85 PathProgramCache]: Analyzing trace with hash 963166306, now seen corresponding path program 1 times [2021-12-06 17:34:10,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:34:10,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536688016] [2021-12-06 17:34:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:10,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:34:10,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:34:10,712 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:34:10,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2021-12-06 17:34:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:10,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 17:34:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:10,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:34:11,016 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:34:11,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 17:34:11,113 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:34:11,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 17:34:11,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:34:11,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:34:11,388 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:34:11,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 17:34:11,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 17:34:11,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:34:11,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:34:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:34:11,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:34:12,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-06 17:34:12,356 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 [2021-12-06 17:34:12,899 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:34:12,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536688016] [2021-12-06 17:34:12,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536688016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:12,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [454371897] [2021-12-06 17:34:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:12,899 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:34:12,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:34:12,900 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:34:12,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2021-12-06 17:34:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:13,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 17:34:13,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:13,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:34:13,170 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:34:13,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 17:34:13,210 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:34:13,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 17:34:13,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:34:13,302 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:34:13,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 17:34:13,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:34:13,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 17:34:13,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:34:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:34:13,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:34:13,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 17:34:14,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-06 17:34:15,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [454371897] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:15,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:34:15,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-12-06 17:34:15,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336607922] [2021-12-06 17:34:15,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:34:15,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 17:34:15,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:34:15,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 17:34:15,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 17:34:15,006 INFO L87 Difference]: Start difference. First operand 443 states and 560 transitions. Second operand has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 17:34:19,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:19,816 INFO L93 Difference]: Finished difference Result 495 states and 572 transitions. [2021-12-06 17:34:19,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 17:34:19,817 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2021-12-06 17:34:19,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:19,818 INFO L225 Difference]: With dead ends: 495 [2021-12-06 17:34:19,818 INFO L226 Difference]: Without dead ends: 495 [2021-12-06 17:34:19,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 15 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 17:34:19,818 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 577 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 2906 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:19,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 2906 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-06 17:34:19,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-12-06 17:34:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 443. [2021-12-06 17:34:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 302 states have (on average 1.6721854304635762) internal successors, (505), 404 states have internal predecessors, (505), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2021-12-06 17:34:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 559 transitions. [2021-12-06 17:34:19,823 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 559 transitions. Word has length 52 [2021-12-06 17:34:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:19,823 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 559 transitions. [2021-12-06 17:34:19,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 17:34:19,823 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 559 transitions. [2021-12-06 17:34:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 17:34:19,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:19,824 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:19,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (90)] Ended with exit code 0 [2021-12-06 17:34:20,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 0 [2021-12-06 17:34:20,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:34:20,225 INFO L402 AbstractCegarLoop]: === Iteration 68 === 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)] === [2021-12-06 17:34:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:20,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2110101979, now seen corresponding path program 1 times [2021-12-06 17:34:20,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:34:20,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206869740] [2021-12-06 17:34:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:20,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:34:20,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:34:20,227 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:34:20,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2021-12-06 17:34:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:20,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 17:34:20,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:20,476 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:34:20,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-12-06 17:34:20,571 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:34:20,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-12-06 17:34:20,724 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:34:20,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-06 17:34:20,963 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:34:20,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 17:34:21,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:34:21,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:34:21,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:34:21,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 17:34:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:34:21,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:34:21,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:34:21,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206869740] [2021-12-06 17:34:21,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206869740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:21,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1419635299] [2021-12-06 17:34:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:21,878 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:34:21,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:34:21,879 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:34:21,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2021-12-06 17:34:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:22,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 17:34:22,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:22,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:34:22,248 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:34:22,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-06 17:34:22,438 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:34:22,438 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 37 [2021-12-06 17:34:23,024 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 17:34:23,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2021-12-06 17:34:24,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:34:24,265 INFO L354 Elim1Store]: treesize reduction 53, result has 41.1 percent of original size [2021-12-06 17:34:24,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 47 treesize of output 74 [2021-12-06 17:34:25,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:34:26,278 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 17:34:26,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 50 [2021-12-06 17:34:27,102 INFO L354 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2021-12-06 17:34:27,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 85 [2021-12-06 17:34:28,615 INFO L354 Elim1Store]: treesize reduction 61, result has 37.8 percent of original size [2021-12-06 17:34:28,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 77 treesize of output 105 [2021-12-06 17:34:30,684 INFO L354 Elim1Store]: treesize reduction 45, result has 45.1 percent of original size [2021-12-06 17:34:30,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 98 [2021-12-06 17:34:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:34:33,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:34:53,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1419635299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:53,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:34:53,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 27] total 35 [2021-12-06 17:34:53,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970857063] [2021-12-06 17:34:53,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:34:53,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 17:34:53,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:34:53,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 17:34:53,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1836, Unknown=1, NotChecked=0, Total=2352 [2021-12-06 17:34:53,484 INFO L87 Difference]: Start difference. First operand 443 states and 559 transitions. Second operand has 37 states, 33 states have (on average 2.0) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (9), 1 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-06 17:34:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:56,356 INFO L93 Difference]: Finished difference Result 443 states and 558 transitions. [2021-12-06 17:34:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:34:56,357 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 33 states have (on average 2.0) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (9), 1 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 54 [2021-12-06 17:34:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:56,358 INFO L225 Difference]: With dead ends: 443 [2021-12-06 17:34:56,358 INFO L226 Difference]: Without dead ends: 443 [2021-12-06 17:34:56,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 83 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=540, Invalid=2214, Unknown=2, NotChecked=0, Total=2756 [2021-12-06 17:34:56,359 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 11 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:56,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1005 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 348 Invalid, 0 Unknown, 191 Unchecked, 0.7s Time] [2021-12-06 17:34:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-12-06 17:34:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2021-12-06 17:34:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 302 states have (on average 1.6688741721854305) internal successors, (504), 404 states have internal predecessors, (504), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2021-12-06 17:34:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 558 transitions. [2021-12-06 17:34:56,363 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 558 transitions. Word has length 54 [2021-12-06 17:34:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:56,363 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 558 transitions. [2021-12-06 17:34:56,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 33 states have (on average 2.0) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (9), 1 states have call predecessors, (9), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-06 17:34:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 558 transitions. [2021-12-06 17:34:56,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 17:34:56,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:56,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:56,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2021-12-06 17:34:56,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2021-12-06 17:34:56,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:34:56,766 INFO L402 AbstractCegarLoop]: === Iteration 69 === 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)] === [2021-12-06 17:34:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:56,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2110101978, now seen corresponding path program 1 times [2021-12-06 17:34:56,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:34:56,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969835580] [2021-12-06 17:34:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:56,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:34:56,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:34:56,770 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:34:56,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2021-12-06 17:34:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:57,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 17:34:57,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:57,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:34:57,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:34:57,292 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:34:57,292 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 [2021-12-06 17:34:57,410 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:34:57,410 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 [2021-12-06 17:34:57,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:35:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:35:01,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:35:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:35:01,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-06 17:35:13,874 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-12-06 17:35:13,874 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 17 treesize of output 30 [2021-12-06 17:35:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 27 refuted. 4 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:35:14,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:14,994 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:35:14,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969835580] [2021-12-06 17:35:14,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969835580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:14,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [189253380] [2021-12-06 17:35:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:14,995 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:35:14,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:35:14,995 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:35:14,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2021-12-06 17:35:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:15,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 17:35:15,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:15,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 17:35:15,424 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:15,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 17:35:15,447 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:35:15,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2021-12-06 17:35:15,747 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:35:15,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 17:35:15,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:35:16,390 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:16,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 17:35:16,423 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-06 17:35:16,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-12-06 17:35:16,822 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:16,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 17:35:17,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:35:18,151 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:35:18,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2021-12-06 17:35:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 2 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:35:18,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:19,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:35:19,627 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 165 treesize of output 167 [2021-12-06 17:35:21,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [189253380] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:21,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:35:21,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 22] total 27 [2021-12-06 17:35:21,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115058723] [2021-12-06 17:35:21,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:21,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 17:35:21,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:35:21,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 17:35:21,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1101, Unknown=8, NotChecked=0, Total=1406 [2021-12-06 17:35:21,036 INFO L87 Difference]: Start difference. First operand 443 states and 558 transitions. Second operand has 29 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 7 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:35:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:22,971 INFO L93 Difference]: Finished difference Result 443 states and 557 transitions. [2021-12-06 17:35:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:35:22,972 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 7 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 54 [2021-12-06 17:35:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:22,975 INFO L225 Difference]: With dead ends: 443 [2021-12-06 17:35:22,976 INFO L226 Difference]: Without dead ends: 443 [2021-12-06 17:35:22,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=410, Invalid=1652, Unknown=8, NotChecked=0, Total=2070 [2021-12-06 17:35:22,976 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 10 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1072 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:22,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2105 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 328 Invalid, 0 Unknown, 1072 Unchecked, 1.0s Time] [2021-12-06 17:35:22,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-12-06 17:35:22,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2021-12-06 17:35:22,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 302 states have (on average 1.6655629139072847) internal successors, (503), 404 states have internal predecessors, (503), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2021-12-06 17:35:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 557 transitions. [2021-12-06 17:35:22,981 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 557 transitions. Word has length 54 [2021-12-06 17:35:22,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:22,981 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 557 transitions. [2021-12-06 17:35:22,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 7 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:35:22,981 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 557 transitions. [2021-12-06 17:35:22,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 17:35:22,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:22,982 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:22,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (94)] Ended with exit code 0 [2021-12-06 17:35:23,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (95)] Forceful destruction successful, exit code 0 [2021-12-06 17:35:23,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:35:23,383 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:35:23,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:23,385 INFO L85 PathProgramCache]: Analyzing trace with hash -894879203, now seen corresponding path program 1 times [2021-12-06 17:35:23,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:35:23,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828246583] [2021-12-06 17:35:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:23,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:35:23,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:35:23,389 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:35:23,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2021-12-06 17:35:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:35:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 17:35:23,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:35:23,604 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:35:23,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828246583] [2021-12-06 17:35:23,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828246583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:23,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:23,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:35:23,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436675589] [2021-12-06 17:35:23,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:23,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:35:23,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:35:23,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:35:23,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:23,605 INFO L87 Difference]: Start difference. First operand 443 states and 557 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:35:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:23,658 INFO L93 Difference]: Finished difference Result 447 states and 559 transitions. [2021-12-06 17:35:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:35:23,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2021-12-06 17:35:23,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:23,660 INFO L225 Difference]: With dead ends: 447 [2021-12-06 17:35:23,660 INFO L226 Difference]: Without dead ends: 447 [2021-12-06 17:35:23,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:23,660 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 213 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:23,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1108 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:35:23,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-06 17:35:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 442. [2021-12-06 17:35:23,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 302 states have (on average 1.6622516556291391) internal successors, (502), 403 states have internal predecessors, (502), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2021-12-06 17:35:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 556 transitions. [2021-12-06 17:35:23,665 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 556 transitions. Word has length 55 [2021-12-06 17:35:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:23,665 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 556 transitions. [2021-12-06 17:35:23,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:35:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 556 transitions. [2021-12-06 17:35:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 17:35:23,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:23,666 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:23,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (96)] Ended with exit code 0 [2021-12-06 17:35:23,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:35:23,866 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:35:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:23,867 INFO L85 PathProgramCache]: Analyzing trace with hash -894879327, now seen corresponding path program 1 times [2021-12-06 17:35:23,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:35:23,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853230610] [2021-12-06 17:35:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:23,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:35:23,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:35:23,868 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:35:23,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2021-12-06 17:35:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:24,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:35:24,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 17:35:24,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:35:24,079 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:35:24,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853230610] [2021-12-06 17:35:24,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853230610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:24,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:24,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:35:24,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685408805] [2021-12-06 17:35:24,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:24,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:35:24,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:35:24,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:35:24,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:24,080 INFO L87 Difference]: Start difference. First operand 442 states and 556 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:35:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:24,146 INFO L93 Difference]: Finished difference Result 462 states and 511 transitions. [2021-12-06 17:35:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:35:24,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2021-12-06 17:35:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:24,148 INFO L225 Difference]: With dead ends: 462 [2021-12-06 17:35:24,148 INFO L226 Difference]: Without dead ends: 462 [2021-12-06 17:35:24,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:24,148 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 93 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:24,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1314 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:35:24,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-06 17:35:24,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 370. [2021-12-06 17:35:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 239 states have (on average 1.5857740585774058) internal successors, (379), 340 states have internal predecessors, (379), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:35:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 414 transitions. [2021-12-06 17:35:24,153 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 414 transitions. Word has length 55 [2021-12-06 17:35:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:24,153 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 414 transitions. [2021-12-06 17:35:24,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:35:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 414 transitions. [2021-12-06 17:35:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 17:35:24,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:24,154 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1] [2021-12-06 17:35:24,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (97)] Ended with exit code 0 [2021-12-06 17:35:24,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:35:24,355 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:35:24,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:24,356 INFO L85 PathProgramCache]: Analyzing trace with hash -923508478, now seen corresponding path program 1 times [2021-12-06 17:35:24,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:35:24,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779584253] [2021-12-06 17:35:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:24,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:35:24,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:35:24,360 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:35:24,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2021-12-06 17:35:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:24,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:35:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:24,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:35:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 17:35:24,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:35:24,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:35:24,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779584253] [2021-12-06 17:35:24,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779584253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:24,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:24,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:35:24,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145338873] [2021-12-06 17:35:24,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:24,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:35:24,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:35:24,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:35:24,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:24,800 INFO L87 Difference]: Start difference. First operand 370 states and 414 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:35:25,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:25,404 INFO L93 Difference]: Finished difference Result 388 states and 438 transitions. [2021-12-06 17:35:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:35:25,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2021-12-06 17:35:25,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:25,406 INFO L225 Difference]: With dead ends: 388 [2021-12-06 17:35:25,406 INFO L226 Difference]: Without dead ends: 388 [2021-12-06 17:35:25,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:25,407 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 51 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:25,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 883 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:35:25,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-12-06 17:35:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 368. [2021-12-06 17:35:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 239 states have (on average 1.5774058577405858) internal successors, (377), 338 states have internal predecessors, (377), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:35:25,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 412 transitions. [2021-12-06 17:35:25,410 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 412 transitions. Word has length 55 [2021-12-06 17:35:25,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:25,411 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 412 transitions. [2021-12-06 17:35:25,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:35:25,411 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 412 transitions. [2021-12-06 17:35:25,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 17:35:25,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:25,412 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1] [2021-12-06 17:35:25,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2021-12-06 17:35:25,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:35:25,613 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:35:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:25,614 INFO L85 PathProgramCache]: Analyzing trace with hash -923508477, now seen corresponding path program 1 times [2021-12-06 17:35:25,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:35:25,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772817340] [2021-12-06 17:35:25,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:25,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:35:25,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:35:25,618 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:35:25,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2021-12-06 17:35:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:25,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:35:25,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:25,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:35:25,997 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 17:35:25,997 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 [2021-12-06 17:35:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 17:35:26,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:35:26,014 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:35:26,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772817340] [2021-12-06 17:35:26,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772817340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:26,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:26,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:35:26,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597545907] [2021-12-06 17:35:26,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:26,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:35:26,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:35:26,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:35:26,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:26,015 INFO L87 Difference]: Start difference. First operand 368 states and 412 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:35:26,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:26,714 INFO L93 Difference]: Finished difference Result 428 states and 490 transitions. [2021-12-06 17:35:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:35:26,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2021-12-06 17:35:26,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:26,716 INFO L225 Difference]: With dead ends: 428 [2021-12-06 17:35:26,716 INFO L226 Difference]: Without dead ends: 428 [2021-12-06 17:35:26,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:35:26,716 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 136 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:26,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 748 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 298 Invalid, 0 Unknown, 203 Unchecked, 0.7s Time] [2021-12-06 17:35:26,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-12-06 17:35:26,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 367. [2021-12-06 17:35:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 239 states have (on average 1.5732217573221758) internal successors, (376), 337 states have internal predecessors, (376), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:35:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 411 transitions. [2021-12-06 17:35:26,720 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 411 transitions. Word has length 55 [2021-12-06 17:35:26,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:26,720 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 411 transitions. [2021-12-06 17:35:26,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:35:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 411 transitions. [2021-12-06 17:35:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 17:35:26,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:26,721 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1] [2021-12-06 17:35:26,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2021-12-06 17:35:26,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:35:26,922 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:35:26,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:26,923 INFO L85 PathProgramCache]: Analyzing trace with hash -923508476, now seen corresponding path program 1 times [2021-12-06 17:35:26,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:35:26,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704572294] [2021-12-06 17:35:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:26,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:35:26,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:35:26,927 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:35:26,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2021-12-06 17:35:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:27,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 17:35:27,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:27,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:35:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 17:35:27,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:35:27,182 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:35:27,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704572294] [2021-12-06 17:35:27,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704572294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:27,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:27,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:35:27,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40317241] [2021-12-06 17:35:27,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:27,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:35:27,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:35:27,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:35:27,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:35:27,183 INFO L87 Difference]: Start difference. First operand 367 states and 411 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:35:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:28,180 INFO L93 Difference]: Finished difference Result 460 states and 510 transitions. [2021-12-06 17:35:28,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:35:28,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2021-12-06 17:35:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:28,182 INFO L225 Difference]: With dead ends: 460 [2021-12-06 17:35:28,182 INFO L226 Difference]: Without dead ends: 460 [2021-12-06 17:35:28,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:35:28,182 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 100 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:28,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1472 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:35:28,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-06 17:35:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 365. [2021-12-06 17:35:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 239 states have (on average 1.5648535564853556) internal successors, (374), 335 states have internal predecessors, (374), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:35:28,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 409 transitions. [2021-12-06 17:35:28,188 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 409 transitions. Word has length 55 [2021-12-06 17:35:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:28,188 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 409 transitions. [2021-12-06 17:35:28,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:35:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 409 transitions. [2021-12-06 17:35:28,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 17:35:28,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:28,188 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1] [2021-12-06 17:35:28,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (100)] Ended with exit code 0 [2021-12-06 17:35:28,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:35:28,389 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:35:28,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:28,390 INFO L85 PathProgramCache]: Analyzing trace with hash -923508475, now seen corresponding path program 1 times [2021-12-06 17:35:28,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:35:28,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042167357] [2021-12-06 17:35:28,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:28,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:35:28,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:35:28,392 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:35:28,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2021-12-06 17:35:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:28,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:35:28,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:28,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:35:28,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:35:28,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 17:35:28,808 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:35:28,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 17:35:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 17:35:28,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:35:28,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:35:28,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042167357] [2021-12-06 17:35:28,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042167357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:28,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:28,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:35:28,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873690140] [2021-12-06 17:35:28,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:28,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:35:28,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:35:28,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:35:28,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:35:28,871 INFO L87 Difference]: Start difference. First operand 365 states and 409 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:35:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:30,291 INFO L93 Difference]: Finished difference Result 462 states and 512 transitions. [2021-12-06 17:35:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:35:30,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2021-12-06 17:35:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:30,293 INFO L225 Difference]: With dead ends: 462 [2021-12-06 17:35:30,293 INFO L226 Difference]: Without dead ends: 462 [2021-12-06 17:35:30,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:35:30,294 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 148 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:30,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 828 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 373 Invalid, 0 Unknown, 171 Unchecked, 1.4s Time] [2021-12-06 17:35:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-06 17:35:30,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 364. [2021-12-06 17:35:30,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 238 states have (on average 1.5672268907563025) internal successors, (373), 334 states have internal predecessors, (373), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:35:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 408 transitions. [2021-12-06 17:35:30,297 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 408 transitions. Word has length 55 [2021-12-06 17:35:30,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:30,297 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 408 transitions. [2021-12-06 17:35:30,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:35:30,297 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 408 transitions. [2021-12-06 17:35:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 17:35:30,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:30,298 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:30,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (101)] Ended with exit code 0 [2021-12-06 17:35:30,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:35:30,499 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:35:30,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:30,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1971451162, now seen corresponding path program 1 times [2021-12-06 17:35:30,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:35:30,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015238463] [2021-12-06 17:35:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:30,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:35:30,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:35:30,503 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:35:30,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2021-12-06 17:35:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:30,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:35:30,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 17:35:30,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:35:30,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:35:30,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015238463] [2021-12-06 17:35:30,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015238463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:35:30,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:35:30,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:35:30,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035848902] [2021-12-06 17:35:30,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:35:30,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:35:30,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:35:30,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:35:30,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:35:30,779 INFO L87 Difference]: Start difference. First operand 364 states and 408 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:35:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:31,062 INFO L93 Difference]: Finished difference Result 455 states and 504 transitions. [2021-12-06 17:35:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:35:31,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 56 [2021-12-06 17:35:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:31,063 INFO L225 Difference]: With dead ends: 455 [2021-12-06 17:35:31,063 INFO L226 Difference]: Without dead ends: 455 [2021-12-06 17:35:31,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:35:31,064 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 369 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:31,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1118 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:35:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-06 17:35:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 364. [2021-12-06 17:35:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 238 states have (on average 1.5630252100840336) internal successors, (372), 334 states have internal predecessors, (372), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:35:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 407 transitions. [2021-12-06 17:35:31,068 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 407 transitions. Word has length 56 [2021-12-06 17:35:31,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:31,068 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 407 transitions. [2021-12-06 17:35:31,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:35:31,068 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 407 transitions. [2021-12-06 17:35:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 17:35:31,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:31,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:31,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (102)] Ended with exit code 0 [2021-12-06 17:35:31,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:35:31,270 INFO L402 AbstractCegarLoop]: === Iteration 77 === 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)] === [2021-12-06 17:35:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash -583426009, now seen corresponding path program 1 times [2021-12-06 17:35:31,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:35:31,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102086953] [2021-12-06 17:35:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:31,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:35:31,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:35:31,274 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:35:31,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2021-12-06 17:35:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 17:35:31,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:31,604 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:35:31,605 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 14 treesize of output 23 [2021-12-06 17:35:31,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:35:31,794 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 23 treesize of output 27 [2021-12-06 17:35:31,947 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:31,947 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 14 treesize of output 20 [2021-12-06 17:35:31,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:35:31,982 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:31,982 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 14 treesize of output 20 [2021-12-06 17:35:31,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:35:32,222 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:32,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-06 17:35:32,258 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:32,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-06 17:35:32,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 17:35:32,452 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:32,452 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 18 treesize of output 24 [2021-12-06 17:35:32,487 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:32,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-06 17:35:32,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:35:33,005 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:35:33,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-12-06 17:35:37,246 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:35:37,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2021-12-06 17:35:37,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:35:37,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:35:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 17:35:37,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:37,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:35:37,556 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 [2021-12-06 17:35:38,144 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 17:35:38,145 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 99 treesize of output 95 [2021-12-06 17:35:39,064 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_entry_point_~cfg~2#1.base| |c_~#ldv_global_msg_list~0.base|) (and (= |c_ULTIMATE.start_entry_point_~client~0#1.base| |c_ULTIMATE.start_entry_point_~cfg~2#1.base|) (not (= |c_ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32)))) (= |c_ULTIMATE.start_entry_point_~client~0#1.base| |c_~#ldv_global_msg_list~0.base|) (and (forall ((v_ArrVal_2398 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_2398) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.base|)) (forall ((v_ArrVal_2399 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_2399) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_2399 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_2399) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (bvadd (_ bv4 32) |c_~#ldv_global_msg_list~0.offset|))))) is different from false [2021-12-06 17:35:39,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:35:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102086953] [2021-12-06 17:35:39,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102086953] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1427682246] [2021-12-06 17:35:39,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:39,158 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:35:39,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:35:39,159 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:35:39,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (104)] Waiting until timeout for monitored process [2021-12-06 17:35:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:39,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 17:35:39,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:41,738 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:35:41,739 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 24 [2021-12-06 17:35:42,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:35:42,131 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 26 [2021-12-06 17:35:42,450 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:42,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-06 17:35:42,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:35:42,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 17:35:42,496 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:42,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 17:35:42,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 17:35:42,780 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:42,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-06 17:35:42,803 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:42,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 17:35:42,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 17:35:43,087 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:43,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 41 [2021-12-06 17:35:43,109 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:43,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2021-12-06 17:35:43,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:35:43,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-12-06 17:35:43,630 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 26 treesize of output 18 [2021-12-06 17:35:43,640 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:35:43,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 17:35:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 17:35:43,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:43,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:35:43,688 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 [2021-12-06 17:35:43,865 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 [2021-12-06 17:35:45,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1427682246] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:45,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:35:45,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-12-06 17:35:45,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665749849] [2021-12-06 17:35:45,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:45,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 17:35:45,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:35:45,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 17:35:45,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=923, Unknown=7, NotChecked=64, Total=1190 [2021-12-06 17:35:45,106 INFO L87 Difference]: Start difference. First operand 364 states and 407 transitions. Second operand has 27 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:36:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:00,679 INFO L93 Difference]: Finished difference Result 368 states and 409 transitions. [2021-12-06 17:36:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 17:36:00,680 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 56 [2021-12-06 17:36:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:00,681 INFO L225 Difference]: With dead ends: 368 [2021-12-06 17:36:00,681 INFO L226 Difference]: Without dead ends: 368 [2021-12-06 17:36:00,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=322, Invalid=1649, Unknown=13, NotChecked=86, Total=2070 [2021-12-06 17:36:00,681 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 48 mSDsluCounter, 2702 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 572 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:00,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 2992 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 854 Invalid, 0 Unknown, 572 Unchecked, 2.5s Time] [2021-12-06 17:36:00,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-06 17:36:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 364. [2021-12-06 17:36:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 238 states have (on average 1.5588235294117647) internal successors, (371), 334 states have internal predecessors, (371), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:36:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 406 transitions. [2021-12-06 17:36:00,685 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 406 transitions. Word has length 56 [2021-12-06 17:36:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:00,685 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 406 transitions. [2021-12-06 17:36:00,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:36:00,685 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 406 transitions. [2021-12-06 17:36:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 17:36:00,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:00,685 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:00,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (103)] Ended with exit code 0 [2021-12-06 17:36:00,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (104)] Ended with exit code 0 [2021-12-06 17:36:01,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:36:01,087 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr63REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:36:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1246109365, now seen corresponding path program 1 times [2021-12-06 17:36:01,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:36:01,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242583704] [2021-12-06 17:36:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:01,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:36:01,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:36:01,092 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:36:01,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2021-12-06 17:36:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:01,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:36:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:36:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 17:36:01,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:36:01,296 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:36:01,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242583704] [2021-12-06 17:36:01,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242583704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:36:01,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:36:01,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:36:01,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841931324] [2021-12-06 17:36:01,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:36:01,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:36:01,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:36:01,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:36:01,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:36:01,297 INFO L87 Difference]: Start difference. First operand 364 states and 406 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:36:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:01,340 INFO L93 Difference]: Finished difference Result 427 states and 472 transitions. [2021-12-06 17:36:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:36:01,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 60 [2021-12-06 17:36:01,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:01,342 INFO L225 Difference]: With dead ends: 427 [2021-12-06 17:36:01,342 INFO L226 Difference]: Without dead ends: 427 [2021-12-06 17:36:01,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:36:01,342 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 119 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:01,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 1281 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:36:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-12-06 17:36:01,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 366. [2021-12-06 17:36:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 240 states have (on average 1.5541666666666667) internal successors, (373), 336 states have internal predecessors, (373), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:36:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 408 transitions. [2021-12-06 17:36:01,346 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 408 transitions. Word has length 60 [2021-12-06 17:36:01,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:01,346 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 408 transitions. [2021-12-06 17:36:01,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:36:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 408 transitions. [2021-12-06 17:36:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 17:36:01,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:01,346 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:01,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (105)] Ended with exit code 0 [2021-12-06 17:36:01,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:36:01,547 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr74ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:36:01,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1246108245, now seen corresponding path program 1 times [2021-12-06 17:36:01,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:36:01,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348243720] [2021-12-06 17:36:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:01,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:36:01,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:36:01,548 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:36:01,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2021-12-06 17:36:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:01,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:36:01,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:36:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 17:36:01,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:36:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 17:36:01,838 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:36:01,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348243720] [2021-12-06 17:36:01,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348243720] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:36:01,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:36:01,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-06 17:36:01,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240676463] [2021-12-06 17:36:01,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:36:01,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:36:01,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:36:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:36:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:36:01,839 INFO L87 Difference]: Start difference. First operand 366 states and 408 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:36:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:01,871 INFO L93 Difference]: Finished difference Result 365 states and 407 transitions. [2021-12-06 17:36:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:36:01,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2021-12-06 17:36:01,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:01,872 INFO L225 Difference]: With dead ends: 365 [2021-12-06 17:36:01,872 INFO L226 Difference]: Without dead ends: 365 [2021-12-06 17:36:01,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:36:01,872 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 202 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:01,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1000 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:36:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-06 17:36:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2021-12-06 17:36:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 240 states have (on average 1.55) internal successors, (372), 335 states have internal predecessors, (372), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:36:01,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 407 transitions. [2021-12-06 17:36:01,875 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 407 transitions. Word has length 60 [2021-12-06 17:36:01,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:01,876 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 407 transitions. [2021-12-06 17:36:01,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:36:01,876 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 407 transitions. [2021-12-06 17:36:01,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 17:36:01,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:01,876 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:01,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (106)] Ended with exit code 0 [2021-12-06 17:36:02,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:36:02,077 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr75ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:36:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:02,078 INFO L85 PathProgramCache]: Analyzing trace with hash 25350471, now seen corresponding path program 1 times [2021-12-06 17:36:02,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:36:02,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602618865] [2021-12-06 17:36:02,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:02,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:36:02,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:36:02,082 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:36:02,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2021-12-06 17:36:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:02,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:36:02,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:36:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 17:36:02,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:36:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 17:36:02,926 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:36:02,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602618865] [2021-12-06 17:36:02,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602618865] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:36:02,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:36:02,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-06 17:36:02,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322565903] [2021-12-06 17:36:02,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:36:02,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:36:02,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:36:02,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:36:02,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:36:02,927 INFO L87 Difference]: Start difference. First operand 365 states and 407 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-06 17:36:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:03,106 INFO L93 Difference]: Finished difference Result 522 states and 588 transitions. [2021-12-06 17:36:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:36:03,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 61 [2021-12-06 17:36:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:03,108 INFO L225 Difference]: With dead ends: 522 [2021-12-06 17:36:03,108 INFO L226 Difference]: Without dead ends: 522 [2021-12-06 17:36:03,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:36:03,108 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 254 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1958 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:03,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 1958 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 118 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2021-12-06 17:36:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-12-06 17:36:03,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 431. [2021-12-06 17:36:03,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 295 states have (on average 1.583050847457627) internal successors, (467), 392 states have internal predecessors, (467), 23 states have call successors, (23), 18 states have call predecessors, (23), 22 states have return successors, (31), 24 states have call predecessors, (31), 23 states have call successors, (31) [2021-12-06 17:36:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 521 transitions. [2021-12-06 17:36:03,116 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 521 transitions. Word has length 61 [2021-12-06 17:36:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:03,116 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 521 transitions. [2021-12-06 17:36:03,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-06 17:36:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 521 transitions. [2021-12-06 17:36:03,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 17:36:03,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:03,116 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:03,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2021-12-06 17:36:03,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:36:03,318 INFO L402 AbstractCegarLoop]: === Iteration 81 === 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)] === [2021-12-06 17:36:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:03,319 INFO L85 PathProgramCache]: Analyzing trace with hash -597667913, now seen corresponding path program 1 times [2021-12-06 17:36:03,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:36:03,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345858920] [2021-12-06 17:36:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:03,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:36:03,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:36:03,325 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:36:03,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2021-12-06 17:36:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:03,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 17:36:03,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:36:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 17:36:38,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:36:41,143 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:36:41,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345858920] [2021-12-06 17:36:41,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345858920] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:36:41,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [885644611] [2021-12-06 17:36:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:41,144 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:36:41,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:36:41,144 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:36:41,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (109)] Waiting until timeout for monitored process [2021-12-06 17:36:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:41,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 17:36:41,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:38:03,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:21,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [885644611] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:38:21,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:38:21,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22] total 37 [2021-12-06 17:38:21,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813770436] [2021-12-06 17:38:21,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:38:21,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 17:38:21,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:38:21,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 17:38:21,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2043, Unknown=28, NotChecked=0, Total=2256 [2021-12-06 17:38:21,649 INFO L87 Difference]: Start difference. First operand 431 states and 521 transitions. Second operand has 38 states, 34 states have (on average 2.323529411764706) internal successors, (79), 30 states have internal predecessors, (79), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 17:38:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:38:58,682 INFO L93 Difference]: Finished difference Result 438 states and 526 transitions. [2021-12-06 17:38:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:38:58,683 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.323529411764706) internal successors, (79), 30 states have internal predecessors, (79), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 61 [2021-12-06 17:38:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:38:58,684 INFO L225 Difference]: With dead ends: 438 [2021-12-06 17:38:58,684 INFO L226 Difference]: Without dead ends: 413 [2021-12-06 17:38:58,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 114 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 132.0s TimeCoverageRelationStatistics Valid=311, Invalid=3682, Unknown=39, NotChecked=0, Total=4032 [2021-12-06 17:38:58,684 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 52 mSDsluCounter, 4351 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 4621 SdHoareTripleChecker+Invalid, 2714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2221 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:38:58,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 4621 Invalid, 2714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 481 Invalid, 0 Unknown, 2221 Unchecked, 1.2s Time] [2021-12-06 17:38:58,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-12-06 17:38:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 409. [2021-12-06 17:38:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 274 states have (on average 1.6240875912408759) internal successors, (445), 371 states have internal predecessors, (445), 23 states have call successors, (23), 18 states have call predecessors, (23), 21 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2021-12-06 17:38:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 496 transitions. [2021-12-06 17:38:58,688 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 496 transitions. Word has length 61 [2021-12-06 17:38:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:38:58,688 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 496 transitions. [2021-12-06 17:38:58,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.323529411764706) internal successors, (79), 30 states have internal predecessors, (79), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 17:38:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 496 transitions. [2021-12-06 17:38:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 17:38:58,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:38:58,689 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:38:58,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (109)] Forceful destruction successful, exit code 0 [2021-12-06 17:38:58,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (108)] Ended with exit code 0 [2021-12-06 17:38:59,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:38:59,091 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:38:59,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:38:59,092 INFO L85 PathProgramCache]: Analyzing trace with hash 785865005, now seen corresponding path program 1 times [2021-12-06 17:38:59,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:38:59,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599434132] [2021-12-06 17:38:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:38:59,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:38:59,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:38:59,096 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:38:59,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2021-12-06 17:38:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:38:59,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:38:59,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:38:59,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:38:59,398 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:38:59,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2021-12-06 17:38:59,647 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:38:59,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2021-12-06 17:38:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:38:59,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 17:39:04,581 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:04,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599434132] [2021-12-06 17:39:04,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599434132] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:39:04,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:39:04,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-12-06 17:39:04,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042770271] [2021-12-06 17:39:04,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:04,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:39:04,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:04,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:39:04,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=246, Unknown=2, NotChecked=0, Total=306 [2021-12-06 17:39:04,583 INFO L87 Difference]: Start difference. First operand 409 states and 496 transitions. Second operand has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 17:39:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:05,557 INFO L93 Difference]: Finished difference Result 419 states and 507 transitions. [2021-12-06 17:39:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:39:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-06 17:39:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:05,558 INFO L225 Difference]: With dead ends: 419 [2021-12-06 17:39:05,558 INFO L226 Difference]: Without dead ends: 419 [2021-12-06 17:39:05,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=58, Invalid=246, Unknown=2, NotChecked=0, Total=306 [2021-12-06 17:39:05,559 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 21 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 665 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:05,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2214 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 627 Invalid, 0 Unknown, 665 Unchecked, 1.0s Time] [2021-12-06 17:39:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-06 17:39:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 417. [2021-12-06 17:39:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 282 states have (on average 1.6063829787234043) internal successors, (453), 379 states have internal predecessors, (453), 23 states have call successors, (23), 18 states have call predecessors, (23), 21 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2021-12-06 17:39:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 504 transitions. [2021-12-06 17:39:05,563 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 504 transitions. Word has length 62 [2021-12-06 17:39:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:05,563 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 504 transitions. [2021-12-06 17:39:05,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 17:39:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 504 transitions. [2021-12-06 17:39:05,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 17:39:05,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:05,563 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:05,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (110)] Ended with exit code 0 [2021-12-06 17:39:05,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:05,765 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:39:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:05,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1079268012, now seen corresponding path program 1 times [2021-12-06 17:39:05,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:05,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985199502] [2021-12-06 17:39:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:05,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:05,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:05,770 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:05,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2021-12-06 17:39:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:06,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:39:06,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 17:39:06,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:39:06,191 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:06,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985199502] [2021-12-06 17:39:06,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985199502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:39:06,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:39:06,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:39:06,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106125451] [2021-12-06 17:39:06,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:39:06,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:39:06,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:06,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:39:06,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:39:06,192 INFO L87 Difference]: Start difference. First operand 417 states and 504 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:39:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:06,252 INFO L93 Difference]: Finished difference Result 467 states and 557 transitions. [2021-12-06 17:39:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:39:06,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 62 [2021-12-06 17:39:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:06,253 INFO L225 Difference]: With dead ends: 467 [2021-12-06 17:39:06,254 INFO L226 Difference]: Without dead ends: 467 [2021-12-06 17:39:06,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:39:06,254 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 206 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:06,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1254 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:39:06,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-06 17:39:06,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 410. [2021-12-06 17:39:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 275 states have (on average 1.6181818181818182) internal successors, (445), 372 states have internal predecessors, (445), 23 states have call successors, (23), 18 states have call predecessors, (23), 21 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2021-12-06 17:39:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 496 transitions. [2021-12-06 17:39:06,259 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 496 transitions. Word has length 62 [2021-12-06 17:39:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:06,259 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 496 transitions. [2021-12-06 17:39:06,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 17:39:06,259 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 496 transitions. [2021-12-06 17:39:06,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:39:06,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:06,260 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:06,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (111)] Forceful destruction successful, exit code 0 [2021-12-06 17:39:06,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:06,461 INFO L402 AbstractCegarLoop]: === Iteration 84 === 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)] === [2021-12-06 17:39:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:06,462 INFO L85 PathProgramCache]: Analyzing trace with hash -697961265, now seen corresponding path program 1 times [2021-12-06 17:39:06,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:06,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837672247] [2021-12-06 17:39:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:06,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:06,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:06,466 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:06,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2021-12-06 17:39:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:06,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:39:06,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 17:39:07,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 17:39:07,394 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:07,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837672247] [2021-12-06 17:39:07,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837672247] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:39:07,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:39:07,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-06 17:39:07,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599819681] [2021-12-06 17:39:07,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:07,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:39:07,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:07,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:39:07,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:39:07,395 INFO L87 Difference]: Start difference. First operand 410 states and 496 transitions. Second operand has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-06 17:39:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:07,629 INFO L93 Difference]: Finished difference Result 505 states and 568 transitions. [2021-12-06 17:39:07,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:39:07,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 64 [2021-12-06 17:39:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:07,630 INFO L225 Difference]: With dead ends: 505 [2021-12-06 17:39:07,631 INFO L226 Difference]: Without dead ends: 505 [2021-12-06 17:39:07,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:39:07,631 INFO L933 BasicCegarLoop]: 406 mSDtfsCounter, 270 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:07,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 2248 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 150 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2021-12-06 17:39:07,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-12-06 17:39:07,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 412. [2021-12-06 17:39:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 277 states have (on average 1.6137184115523466) internal successors, (447), 374 states have internal predecessors, (447), 23 states have call successors, (23), 18 states have call predecessors, (23), 21 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2021-12-06 17:39:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 498 transitions. [2021-12-06 17:39:07,638 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 498 transitions. Word has length 64 [2021-12-06 17:39:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:07,638 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 498 transitions. [2021-12-06 17:39:07,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-06 17:39:07,638 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 498 transitions. [2021-12-06 17:39:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:39:07,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:07,638 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:07,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2021-12-06 17:39:07,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:07,840 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:39:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:07,841 INFO L85 PathProgramCache]: Analyzing trace with hash -902698691, now seen corresponding path program 1 times [2021-12-06 17:39:07,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:07,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144297686] [2021-12-06 17:39:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:07,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:07,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:07,845 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:07,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2021-12-06 17:39:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:08,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:39:08,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 17:39:08,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:39:08,154 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:08,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144297686] [2021-12-06 17:39:08,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144297686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:39:08,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:39:08,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:39:08,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260783585] [2021-12-06 17:39:08,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:39:08,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:39:08,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:39:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:39:08,155 INFO L87 Difference]: Start difference. First operand 412 states and 498 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 17:39:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:08,612 INFO L93 Difference]: Finished difference Result 424 states and 512 transitions. [2021-12-06 17:39:08,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:39:08,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 65 [2021-12-06 17:39:08,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:08,613 INFO L225 Difference]: With dead ends: 424 [2021-12-06 17:39:08,613 INFO L226 Difference]: Without dead ends: 421 [2021-12-06 17:39:08,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:39:08,613 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 3 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:08,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 919 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:39:08,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-12-06 17:39:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2021-12-06 17:39:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 284 states have (on average 1.6056338028169015) internal successors, (456), 383 states have internal predecessors, (456), 23 states have call successors, (23), 18 states have call predecessors, (23), 23 states have return successors, (30), 23 states have call predecessors, (30), 23 states have call successors, (30) [2021-12-06 17:39:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 509 transitions. [2021-12-06 17:39:08,618 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 509 transitions. Word has length 65 [2021-12-06 17:39:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:08,618 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 509 transitions. [2021-12-06 17:39:08,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 17:39:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 509 transitions. [2021-12-06 17:39:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:39:08,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:08,619 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:08,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2021-12-06 17:39:08,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:08,820 INFO L402 AbstractCegarLoop]: === Iteration 86 === 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)] === [2021-12-06 17:39:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:08,821 INFO L85 PathProgramCache]: Analyzing trace with hash -161962324, now seen corresponding path program 1 times [2021-12-06 17:39:08,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:08,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575243672] [2021-12-06 17:39:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:08,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:08,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:08,825 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:08,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2021-12-06 17:39:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:09,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:39:09,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:09,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:39:09,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-06 17:39:09,294 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:39:09,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 17:39:09,489 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:39:09,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2021-12-06 17:39:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:10,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:10,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 26 [2021-12-06 17:39:10,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 17:39:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:39:10,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:11,480 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:11,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575243672] [2021-12-06 17:39:11,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575243672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:11,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [597833935] [2021-12-06 17:39:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:11,481 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:39:11,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:39:11,482 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:39:11,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2021-12-06 17:39:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:11,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 17:39:11,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:11,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:39:11,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-06 17:39:12,099 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:39:12,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 17:39:12,264 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:39:12,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2021-12-06 17:39:13,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:13,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:13,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 26 [2021-12-06 17:39:13,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:39:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:39:13,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:13,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [597833935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:13,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:39:13,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-12-06 17:39:13,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717162797] [2021-12-06 17:39:13,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:13,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:39:13,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:13,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:39:13,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:39:13,668 INFO L87 Difference]: Start difference. First operand 421 states and 509 transitions. Second operand has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 17:39:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:15,534 INFO L93 Difference]: Finished difference Result 426 states and 515 transitions. [2021-12-06 17:39:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:39:15,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 17:39:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:15,536 INFO L225 Difference]: With dead ends: 426 [2021-12-06 17:39:15,536 INFO L226 Difference]: Without dead ends: 426 [2021-12-06 17:39:15,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 129 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:39:15,537 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 47 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 645 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:15,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 1940 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 704 Invalid, 0 Unknown, 645 Unchecked, 1.8s Time] [2021-12-06 17:39:15,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-12-06 17:39:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 422. [2021-12-06 17:39:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 285 states have (on average 1.6035087719298247) internal successors, (457), 384 states have internal predecessors, (457), 23 states have call successors, (23), 18 states have call predecessors, (23), 23 states have return successors, (30), 23 states have call predecessors, (30), 23 states have call successors, (30) [2021-12-06 17:39:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 510 transitions. [2021-12-06 17:39:15,541 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 510 transitions. Word has length 65 [2021-12-06 17:39:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:15,541 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 510 transitions. [2021-12-06 17:39:15,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 17:39:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 510 transitions. [2021-12-06 17:39:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 17:39:15,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:15,542 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:15,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2021-12-06 17:39:15,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (115)] Ended with exit code 0 [2021-12-06 17:39:15,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:39:15,943 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:39:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:15,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1163228186, now seen corresponding path program 1 times [2021-12-06 17:39:15,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:15,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205389836] [2021-12-06 17:39:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:15,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:15,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:15,949 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:15,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2021-12-06 17:39:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:16,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:39:16,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 17:39:16,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 17:39:16,305 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:16,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205389836] [2021-12-06 17:39:16,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205389836] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:39:16,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:39:16,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 17:39:16,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115253113] [2021-12-06 17:39:16,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:16,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:39:16,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:16,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:39:16,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:39:16,306 INFO L87 Difference]: Start difference. First operand 422 states and 510 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-06 17:39:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:18,079 INFO L93 Difference]: Finished difference Result 448 states and 547 transitions. [2021-12-06 17:39:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:39:18,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 66 [2021-12-06 17:39:18,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:18,080 INFO L225 Difference]: With dead ends: 448 [2021-12-06 17:39:18,080 INFO L226 Difference]: Without dead ends: 448 [2021-12-06 17:39:18,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:39:18,081 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 24 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:18,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1821 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 17:39:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-12-06 17:39:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 439. [2021-12-06 17:39:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 301 states have (on average 1.5980066445182723) internal successors, (481), 399 states have internal predecessors, (481), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2021-12-06 17:39:18,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 535 transitions. [2021-12-06 17:39:18,085 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 535 transitions. Word has length 66 [2021-12-06 17:39:18,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:18,086 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 535 transitions. [2021-12-06 17:39:18,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-06 17:39:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 535 transitions. [2021-12-06 17:39:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 17:39:18,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:18,086 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:18,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (116)] Ended with exit code 0 [2021-12-06 17:39:18,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:18,287 INFO L402 AbstractCegarLoop]: === Iteration 88 === 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)] === [2021-12-06 17:39:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:18,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1026957458, now seen corresponding path program 1 times [2021-12-06 17:39:18,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:18,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877264056] [2021-12-06 17:39:18,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:18,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:18,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:18,292 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:18,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2021-12-06 17:39:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:18,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:39:18,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 17:39:19,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 17:39:19,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:19,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877264056] [2021-12-06 17:39:19,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877264056] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:39:19,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:39:19,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-06 17:39:19,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543897532] [2021-12-06 17:39:19,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:19,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:39:19,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:19,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:39:19,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:39:19,563 INFO L87 Difference]: Start difference. First operand 439 states and 535 transitions. Second operand has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-06 17:39:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:19,781 INFO L93 Difference]: Finished difference Result 534 states and 607 transitions. [2021-12-06 17:39:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:39:19,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 67 [2021-12-06 17:39:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:19,783 INFO L225 Difference]: With dead ends: 534 [2021-12-06 17:39:19,783 INFO L226 Difference]: Without dead ends: 534 [2021-12-06 17:39:19,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:39:19,783 INFO L933 BasicCegarLoop]: 406 mSDtfsCounter, 251 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 2399 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:19,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 2399 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 170 Unchecked, 0.2s Time] [2021-12-06 17:39:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-12-06 17:39:19,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 441. [2021-12-06 17:39:19,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 303 states have (on average 1.5940594059405941) internal successors, (483), 401 states have internal predecessors, (483), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2021-12-06 17:39:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 537 transitions. [2021-12-06 17:39:19,789 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 537 transitions. Word has length 67 [2021-12-06 17:39:19,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:19,789 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 537 transitions. [2021-12-06 17:39:19,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-06 17:39:19,789 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 537 transitions. [2021-12-06 17:39:19,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 17:39:19,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:19,789 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:19,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (117)] Ended with exit code 0 [2021-12-06 17:39:19,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:19,991 INFO L402 AbstractCegarLoop]: === Iteration 89 === 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)] === [2021-12-06 17:39:19,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:19,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1770909708, now seen corresponding path program 1 times [2021-12-06 17:39:19,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:19,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256544521] [2021-12-06 17:39:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:19,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:19,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:19,996 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:19,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2021-12-06 17:39:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:20,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 17:39:20,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:20,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:39:20,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 17:39:20,534 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:39:20,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 39 [2021-12-06 17:39:20,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 17:39:20,840 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:39:20,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-06 17:39:21,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:21,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:39:21,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-06 17:39:22,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:22,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:22,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2021-12-06 17:39:22,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-06 17:39:22,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-06 17:39:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:39:22,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:23,817 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:23,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256544521] [2021-12-06 17:39:23,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256544521] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:23,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1119417289] [2021-12-06 17:39:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:23,818 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:39:23,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:39:23,819 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:39:23,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2021-12-06 17:39:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:24,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 17:39:24,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:24,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:39:24,682 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:39:24,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2021-12-06 17:39:25,078 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:39:25,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-06 17:39:25,465 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:39:25,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 25 [2021-12-06 17:39:25,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 17:39:26,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:26,511 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:39:26,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 37 [2021-12-06 17:39:27,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-12-06 17:39:27,700 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:39:27,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 61 [2021-12-06 17:39:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 17:39:28,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:29,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1119417289] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:29,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:39:29,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-12-06 17:39:29,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257475132] [2021-12-06 17:39:29,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:29,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 17:39:29,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 17:39:29,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=2101, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 17:39:29,967 INFO L87 Difference]: Start difference. First operand 441 states and 537 transitions. Second operand has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 31 states have internal predecessors, (88), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:39:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:33,098 INFO L93 Difference]: Finished difference Result 444 states and 541 transitions. [2021-12-06 17:39:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:39:33,099 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 31 states have internal predecessors, (88), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 68 [2021-12-06 17:39:33,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:33,100 INFO L225 Difference]: With dead ends: 444 [2021-12-06 17:39:33,100 INFO L226 Difference]: Without dead ends: 444 [2021-12-06 17:39:33,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 114 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=566, Invalid=3094, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 17:39:33,101 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 44 mSDsluCounter, 2918 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3209 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1046 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:33,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3209 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 659 Invalid, 0 Unknown, 1046 Unchecked, 1.1s Time] [2021-12-06 17:39:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-12-06 17:39:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 442. [2021-12-06 17:39:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 304 states have (on average 1.5921052631578947) internal successors, (484), 402 states have internal predecessors, (484), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2021-12-06 17:39:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 538 transitions. [2021-12-06 17:39:33,105 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 538 transitions. Word has length 68 [2021-12-06 17:39:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:33,105 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 538 transitions. [2021-12-06 17:39:33,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 31 states have internal predecessors, (88), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:39:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 538 transitions. [2021-12-06 17:39:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 17:39:33,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:33,106 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:33,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (119)] Ended with exit code 0 [2021-12-06 17:39:33,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (118)] Ended with exit code 0 [2021-12-06 17:39:33,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:33,508 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:39:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1956236157, now seen corresponding path program 2 times [2021-12-06 17:39:33,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:33,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993342286] [2021-12-06 17:39:33,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:39:33,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:33,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:33,511 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:33,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2021-12-06 17:39:33,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 17:39:33,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:39:33,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:39:33,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:33,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:39:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 17:39:33,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:39:33,752 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:33,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993342286] [2021-12-06 17:39:33,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993342286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:39:33,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:39:33,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:39:33,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013688357] [2021-12-06 17:39:33,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:39:33,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:39:33,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:33,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:39:33,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:39:33,753 INFO L87 Difference]: Start difference. First operand 442 states and 538 transitions. Second operand has 3 states, 2 states have (on average 18.5) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 17:39:34,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:34,003 INFO L93 Difference]: Finished difference Result 455 states and 556 transitions. [2021-12-06 17:39:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:39:34,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 18.5) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2021-12-06 17:39:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:34,005 INFO L225 Difference]: With dead ends: 455 [2021-12-06 17:39:34,005 INFO L226 Difference]: Without dead ends: 455 [2021-12-06 17:39:34,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:39:34,005 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 40 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:34,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 484 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:39:34,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-06 17:39:34,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 441. [2021-12-06 17:39:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 304 states have (on average 1.5888157894736843) internal successors, (483), 401 states have internal predecessors, (483), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2021-12-06 17:39:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 537 transitions. [2021-12-06 17:39:34,010 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 537 transitions. Word has length 69 [2021-12-06 17:39:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:34,010 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 537 transitions. [2021-12-06 17:39:34,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 18.5) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 17:39:34,010 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 537 transitions. [2021-12-06 17:39:34,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 17:39:34,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:34,010 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:34,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (120)] Ended with exit code 0 [2021-12-06 17:39:34,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:34,212 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:39:34,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:34,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1956236158, now seen corresponding path program 1 times [2021-12-06 17:39:34,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:34,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302781465] [2021-12-06 17:39:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:34,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:34,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:34,217 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:34,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2021-12-06 17:39:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:34,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:39:34,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 17:39:34,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:39:34,650 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:34,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302781465] [2021-12-06 17:39:34,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302781465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:39:34,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:39:34,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:39:34,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808997716] [2021-12-06 17:39:34,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:39:34,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:39:34,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:34,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:39:34,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:39:34,651 INFO L87 Difference]: Start difference. First operand 441 states and 537 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 17:39:34,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:34,902 INFO L93 Difference]: Finished difference Result 459 states and 560 transitions. [2021-12-06 17:39:34,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:39:34,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2021-12-06 17:39:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:34,904 INFO L225 Difference]: With dead ends: 459 [2021-12-06 17:39:34,904 INFO L226 Difference]: Without dead ends: 457 [2021-12-06 17:39:34,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:39:34,904 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 2 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:34,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 920 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:39:34,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-12-06 17:39:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 445. [2021-12-06 17:39:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 308 states have (on average 1.5909090909090908) internal successors, (490), 405 states have internal predecessors, (490), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2021-12-06 17:39:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 544 transitions. [2021-12-06 17:39:34,909 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 544 transitions. Word has length 69 [2021-12-06 17:39:34,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:34,909 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 544 transitions. [2021-12-06 17:39:34,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 17:39:34,909 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 544 transitions. [2021-12-06 17:39:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 17:39:34,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:34,909 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:34,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (121)] Ended with exit code 0 [2021-12-06 17:39:35,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:35,111 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:39:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash 625771301, now seen corresponding path program 1 times [2021-12-06 17:39:35,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:35,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441089279] [2021-12-06 17:39:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:35,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:35,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:35,116 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:35,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2021-12-06 17:39:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:39:35,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:35,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:39:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-06 17:39:35,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:39:35,550 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:35,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441089279] [2021-12-06 17:39:35,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441089279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:39:35,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:39:35,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:39:35,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632923405] [2021-12-06 17:39:35,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:39:35,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:39:35,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:39:35,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:39:35,551 INFO L87 Difference]: Start difference. First operand 445 states and 544 transitions. Second operand has 3 states, 2 states have (on average 19.0) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 17:39:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:35,912 INFO L93 Difference]: Finished difference Result 444 states and 543 transitions. [2021-12-06 17:39:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:39:35,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 19.0) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 70 [2021-12-06 17:39:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:35,915 INFO L225 Difference]: With dead ends: 444 [2021-12-06 17:39:35,915 INFO L226 Difference]: Without dead ends: 444 [2021-12-06 17:39:35,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:39:35,915 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 1 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:35,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 531 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:39:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-12-06 17:39:35,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2021-12-06 17:39:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 308 states have (on average 1.5876623376623376) internal successors, (489), 404 states have internal predecessors, (489), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2021-12-06 17:39:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 543 transitions. [2021-12-06 17:39:35,922 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 543 transitions. Word has length 70 [2021-12-06 17:39:35,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:35,922 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 543 transitions. [2021-12-06 17:39:35,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 19.0) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 17:39:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 543 transitions. [2021-12-06 17:39:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 17:39:35,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:35,923 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:35,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (122)] Ended with exit code 0 [2021-12-06 17:39:36,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:36,124 INFO L402 AbstractCegarLoop]: === Iteration 93 === 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)] === [2021-12-06 17:39:36,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:36,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1037166698, now seen corresponding path program 1 times [2021-12-06 17:39:36,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:36,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163138464] [2021-12-06 17:39:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:36,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:36,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:36,125 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:36,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2021-12-06 17:39:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:36,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:39:36,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 17:39:37,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-06 17:39:37,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:37,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163138464] [2021-12-06 17:39:37,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163138464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:39:37,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:39:37,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-12-06 17:39:37,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920287033] [2021-12-06 17:39:37,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:37,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:39:37,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:37,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:39:37,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:39:37,335 INFO L87 Difference]: Start difference. First operand 444 states and 543 transitions. Second operand has 10 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-06 17:39:37,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:37,523 INFO L93 Difference]: Finished difference Result 539 states and 615 transitions. [2021-12-06 17:39:37,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:39:37,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 70 [2021-12-06 17:39:37,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:37,525 INFO L225 Difference]: With dead ends: 539 [2021-12-06 17:39:37,525 INFO L226 Difference]: Without dead ends: 539 [2021-12-06 17:39:37,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:39:37,525 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 279 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:37,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 1795 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2021-12-06 17:39:37,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-12-06 17:39:37,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 446. [2021-12-06 17:39:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 310 states have (on average 1.5838709677419356) internal successors, (491), 406 states have internal predecessors, (491), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2021-12-06 17:39:37,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 545 transitions. [2021-12-06 17:39:37,531 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 545 transitions. Word has length 70 [2021-12-06 17:39:37,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:37,531 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 545 transitions. [2021-12-06 17:39:37,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-06 17:39:37,531 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 545 transitions. [2021-12-06 17:39:37,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 17:39:37,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:37,532 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:37,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (123)] Ended with exit code 0 [2021-12-06 17:39:37,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:39:37,733 INFO L402 AbstractCegarLoop]: === Iteration 94 === 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)] === [2021-12-06 17:39:37,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:37,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2087396141, now seen corresponding path program 1 times [2021-12-06 17:39:37,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:39:37,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669286164] [2021-12-06 17:39:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:37,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:39:37,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:39:37,740 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:39:37,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2021-12-06 17:39:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:37,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 17:39:37,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:38,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:39:38,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-06 17:39:38,237 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:39:38,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2021-12-06 17:39:38,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 17:39:38,555 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:39:38,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 39 [2021-12-06 17:39:38,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 17:39:38,972 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:39:38,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 17:39:39,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:39,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 17:39:39,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 17:39:40,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:40,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:40,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-06 17:39:40,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-06 17:39:40,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-06 17:39:41,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-12-06 17:39:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 17:39:41,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:42,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:39:42,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669286164] [2021-12-06 17:39:42,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669286164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:42,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [606442424] [2021-12-06 17:39:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:42,305 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:39:42,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:39:42,306 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:39:42,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (125)] Waiting until timeout for monitored process [2021-12-06 17:39:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:42,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 17:39:42,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:42,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:39:43,127 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:39:43,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 17:39:43,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:39:43,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-12-06 17:39:43,760 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-06 17:39:43,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2021-12-06 17:39:44,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 17:39:44,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-12-06 17:39:44,768 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:39:44,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2021-12-06 17:39:45,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:45,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 17:39:46,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-12-06 17:39:46,353 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-06 17:39:46,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 39 [2021-12-06 17:39:47,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:47,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 17:39:47,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 17:39:47,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:39:49,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:49,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:49,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-12-06 17:39:49,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:39:50,173 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-06 17:39:50,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-12-06 17:39:50,508 INFO L354 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2021-12-06 17:39:50,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 38 [2021-12-06 17:39:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:39:50,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:53,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [606442424] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:53,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:39:53,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31] total 51 [2021-12-06 17:39:53,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55435300] [2021-12-06 17:39:53,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:53,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 17:39:53,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:39:53,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 17:39:53,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=3833, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 17:39:53,006 INFO L87 Difference]: Start difference. First operand 446 states and 545 transitions. Second operand has 52 states, 48 states have (on average 2.125) internal successors, (102), 42 states have internal predecessors, (102), 10 states have call successors, (11), 5 states have call predecessors, (11), 9 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-06 17:39:59,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:59,996 INFO L93 Difference]: Finished difference Result 451 states and 551 transitions. [2021-12-06 17:39:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 17:39:59,997 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 48 states have (on average 2.125) internal successors, (102), 42 states have internal predecessors, (102), 10 states have call successors, (11), 5 states have call predecessors, (11), 9 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) Word has length 71 [2021-12-06 17:39:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:59,998 INFO L225 Difference]: With dead ends: 451 [2021-12-06 17:39:59,998 INFO L226 Difference]: Without dead ends: 451 [2021-12-06 17:39:59,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 112 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=753, Invalid=5567, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 17:39:59,998 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 82 mSDsluCounter, 3638 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 3899 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1636 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:59,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 3899 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1358 Invalid, 0 Unknown, 1636 Unchecked, 4.1s Time] [2021-12-06 17:39:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-06 17:40:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 447. [2021-12-06 17:40:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 311 states have (on average 1.5819935691318328) internal successors, (492), 407 states have internal predecessors, (492), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2021-12-06 17:40:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 546 transitions. [2021-12-06 17:40:00,003 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 546 transitions. Word has length 71 [2021-12-06 17:40:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:40:00,003 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 546 transitions. [2021-12-06 17:40:00,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 48 states have (on average 2.125) internal successors, (102), 42 states have internal predecessors, (102), 10 states have call successors, (11), 5 states have call predecessors, (11), 9 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-06 17:40:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 546 transitions. [2021-12-06 17:40:00,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 17:40:00,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:40:00,003 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:40:00,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (124)] Ended with exit code 0 [2021-12-06 17:40:00,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (125)] Ended with exit code 0 [2021-12-06 17:40:00,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 17:40:00,405 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:40:00,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:40:00,406 INFO L85 PathProgramCache]: Analyzing trace with hash 70801637, now seen corresponding path program 1 times [2021-12-06 17:40:00,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:40:00,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260934553] [2021-12-06 17:40:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:40:00,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:40:00,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:40:00,410 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:40:00,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2021-12-06 17:40:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:40:01,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 17:40:01,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:40:01,075 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 [2021-12-06 17:40:01,291 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:40:01,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-06 17:40:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:40:01,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:40:01,379 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-06 17:40:01,380 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 2 case distinctions, treesize of input 22 treesize of output 32 [2021-12-06 17:40:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 17:40:01,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:40:01,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:40:01,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260934553] [2021-12-06 17:40:01,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260934553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:40:01,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:40:01,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:40:01,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582141572] [2021-12-06 17:40:01,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:40:01,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:40:01,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:40:01,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:40:01,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:40:01,579 INFO L87 Difference]: Start difference. First operand 447 states and 546 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 17:40:02,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:40:02,182 INFO L93 Difference]: Finished difference Result 467 states and 574 transitions. [2021-12-06 17:40:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:40:02,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-06 17:40:02,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:40:02,184 INFO L225 Difference]: With dead ends: 467 [2021-12-06 17:40:02,184 INFO L226 Difference]: Without dead ends: 459 [2021-12-06 17:40:02,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:40:02,184 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 4 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:40:02,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1210 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 263 Invalid, 0 Unknown, 376 Unchecked, 0.6s Time] [2021-12-06 17:40:02,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-12-06 17:40:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 376. [2021-12-06 17:40:02,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 253 states have (on average 1.5256916996047432) internal successors, (386), 345 states have internal predecessors, (386), 16 states have call successors, (16), 15 states have call predecessors, (16), 17 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:40:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 421 transitions. [2021-12-06 17:40:02,188 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 421 transitions. Word has length 72 [2021-12-06 17:40:02,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:40:02,188 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 421 transitions. [2021-12-06 17:40:02,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 17:40:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 421 transitions. [2021-12-06 17:40:02,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 17:40:02,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:40:02,189 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:40:02,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (126)] Ended with exit code 0 [2021-12-06 17:40:02,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:40:02,390 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:40:02,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:40:02,391 INFO L85 PathProgramCache]: Analyzing trace with hash 70801638, now seen corresponding path program 1 times [2021-12-06 17:40:02,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:40:02,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766130393] [2021-12-06 17:40:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:40:02,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:40:02,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:40:02,395 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:40:02,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2021-12-06 17:40:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:40:03,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:40:03,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:40:03,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:40:03,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:40:03,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:40:03,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:40:03,504 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:40:03,505 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 [2021-12-06 17:40:03,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:40:03,612 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-06 17:40:03,612 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 2 case distinctions, treesize of input 15 treesize of output 27 [2021-12-06 17:40:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-06 17:40:03,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:40:03,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:40:03,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766130393] [2021-12-06 17:40:03,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766130393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:40:03,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:40:03,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:40:03,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105448899] [2021-12-06 17:40:03,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:40:03,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:40:03,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:40:03,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:40:03,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:40:03,713 INFO L87 Difference]: Start difference. First operand 376 states and 421 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 17:40:05,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:40:05,218 INFO L93 Difference]: Finished difference Result 377 states and 423 transitions. [2021-12-06 17:40:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:40:05,219 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-06 17:40:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:40:05,220 INFO L225 Difference]: With dead ends: 377 [2021-12-06 17:40:05,220 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 17:40:05,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:40:05,220 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 8 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:40:05,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1515 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 672 Invalid, 0 Unknown, 264 Unchecked, 1.4s Time] [2021-12-06 17:40:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 17:40:05,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2021-12-06 17:40:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 253 states have (on average 1.5217391304347827) internal successors, (385), 344 states have internal predecessors, (385), 16 states have call successors, (16), 15 states have call predecessors, (16), 17 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-06 17:40:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 420 transitions. [2021-12-06 17:40:05,224 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 420 transitions. Word has length 72 [2021-12-06 17:40:05,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:40:05,224 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 420 transitions. [2021-12-06 17:40:05,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 17:40:05,224 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 420 transitions. [2021-12-06 17:40:05,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 17:40:05,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:40:05,225 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:40:05,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (127)] Ended with exit code 0 [2021-12-06 17:40:05,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:40:05,425 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-12-06 17:40:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:40:05,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2100116427, now seen corresponding path program 1 times [2021-12-06 17:40:05,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:40:05,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731096335] [2021-12-06 17:40:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:40:05,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:40:05,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:40:05,427 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:40:05,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2021-12-06 17:40:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:40:06,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 17:40:06,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:40:06,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:40:06,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 17:40:06,486 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 17:40:06,486 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 [2021-12-06 17:40:07,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:40:07,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:40:07,161 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-12-06 17:40:07,162 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 3 case distinctions, treesize of input 40 treesize of output 50 [2021-12-06 17:40:07,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 32 [2021-12-06 17:40:07,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:40:07,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:40:07,578 INFO L354 Elim1Store]: treesize reduction 42, result has 37.3 percent of original size [2021-12-06 17:40:07,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 65 [2021-12-06 17:40:08,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-12-06 17:40:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 17:40:08,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:40:09,064 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4481 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#buf~0#1.base_11| (_ BitVec 32)) (|v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#msg~2#1.base_9| (_ BitVec 32)) (v_ArrVal_4482 (_ BitVec 1)) (v_ArrVal_4483 (_ BitVec 1))) (let ((.cse0 (store (store |c_#valid| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#buf~0#1.base_11| v_ArrVal_4482) |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#msg~2#1.base_9| v_ArrVal_4483))) (or (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#msg~2#1.base_9|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_4483)) (_ bv1 1)))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#buf~0#1.base_11|)) (= (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#reg#1.base| v_ArrVal_4481) |c_ULTIMATE.start_ldv_m88ts2022_rd_reg_~priv#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_ldv_m88ts2022_rd_reg_~priv#1.offset|)))))))))) (_ bv1 1)) (_ bv0 1)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select .cse0 |c_ULTIMATE.start_ldv_m88ts2022_rd_reg_~priv#1.base|)))) (_ bv1 1))))))) is different from false [2021-12-06 17:40:09,310 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#reg#1.base_10| (_ BitVec 32)) (v_ArrVal_4480 (_ BitVec 1)) (v_ArrVal_4481 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#buf~0#1.base_11| (_ BitVec 32)) (|v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#msg~2#1.base_9| (_ BitVec 32)) (v_ArrVal_4482 (_ BitVec 1)) (v_ArrVal_4483 (_ BitVec 1))) (let ((.cse0 (store (store (store |c_#valid| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#reg#1.base_10| v_ArrVal_4480) |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#buf~0#1.base_11| v_ArrVal_4482) |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#msg~2#1.base_9| v_ArrVal_4483))) (or (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#msg~2#1.base_9|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_4483)) (_ bv1 1)))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#buf~0#1.base_11|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select .cse0 |c_ULTIMATE.start_alloc_fix_12_~priv~0#1.base|))))) (_ bv1 1)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#reg#1.base_10| v_ArrVal_4481) |c_ULTIMATE.start_alloc_fix_12_~priv~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_alloc_fix_12_~priv~0#1.offset|)))))))))) (_ bv1 1))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#reg#1.base_10|)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#reg#1.base_10|)))))))) is different from false [2021-12-06 17:40:09,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:40:09,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2021-12-06 17:40:09,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2021-12-06 17:40:09,356 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 31 treesize of output 27 [2021-12-06 17:40:20,510 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:40:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731096335] [2021-12-06 17:40:20,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731096335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:40:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [554143895] [2021-12-06 17:40:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:40:20,511 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 17:40:20,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 17:40:20,512 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 17:40:20,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bbdd925-0c70-43cb-9c6c-3b57eff9d3e4/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (129)] Waiting until timeout for monitored process [2021-12-06 17:40:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:40:21,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 17:40:21,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:40:21,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:40:21,997 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 17:40:21,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 17:40:23,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:40:23,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:40:23,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2021-12-06 17:40:23,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:40:23,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2021-12-06 17:40:23,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:40:23,929 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 17:40:23,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 44 [2021-12-06 17:40:26,789 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 35 treesize of output 19 [2021-12-06 17:40:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 17:40:29,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:40:30,242 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#buf~0#1.base_13| (_ BitVec 32)) (v_ArrVal_4681 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#msg~2#1.base_11| (_ BitVec 32)) (v_ArrVal_4682 (_ BitVec 1)) (v_ArrVal_4683 (_ BitVec 1))) (or (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#buf~0#1.base_13|)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#buf~0#1.base_13| v_ArrVal_4683) |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#msg~2#1.base_11| v_ArrVal_4682) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#reg#1.base| v_ArrVal_4681) |c_ULTIMATE.start_ldv_m88ts2022_rd_reg_~priv#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_ldv_m88ts2022_rd_reg_~priv#1.offset|))))))))) (not (= (_ bv0 1) (bvadd (bvneg v_ArrVal_4682) (_ bv1 1)))))) is different from false [2021-12-06 17:40:30,334 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#buf~0#1.base_13| (_ BitVec 32)) (|v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#reg#1.base_11| (_ BitVec 32)) (v_ArrVal_4680 (_ BitVec 1)) (v_ArrVal_4681 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#msg~2#1.base_11| (_ BitVec 32)) (v_ArrVal_4682 (_ BitVec 1)) (v_ArrVal_4683 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store (store |c_#valid| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#reg#1.base_11| v_ArrVal_4680) |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#buf~0#1.base_13| v_ArrVal_4683) |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#msg~2#1.base_11| v_ArrVal_4682) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#reg#1.base_11| v_ArrVal_4681) |c_ULTIMATE.start_alloc_fix_12_~priv~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_alloc_fix_12_~priv~0#1.offset|))))))))) (_ bv1 1))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#buf~0#1.base_13|)) (not (= (_ bv0 1) (bvadd (bvneg v_ArrVal_4682) (_ bv1 1)))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_ldv_m88ts2022_rd_reg_~#reg#1.base_11|)))) is different from false [2021-12-06 17:40:30,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:40:30,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 42 [2021-12-06 17:40:30,362 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 74 treesize of output 62 [2021-12-06 17:40:30,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26