./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/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_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/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_5e3bac17-a250-45c1-91c7-df1935e24440/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 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:44:19,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:44:19,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:44:19,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:44:19,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:44:19,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:44:19,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:44:19,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:44:19,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:44:19,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:44:19,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:44:19,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:44:19,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:44:19,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:44:19,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:44:19,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:44:19,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:44:19,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:44:19,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:44:19,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:44:19,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:44:19,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:44:19,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:44:19,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:44:19,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:44:19,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:44:19,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:44:19,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:44:19,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:44:19,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:44:19,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:44:19,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:44:19,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:44:19,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:44:19,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:44:19,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:44:19,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:44:19,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:44:19,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:44:19,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:44:19,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:44:19,183 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 19:44:19,205 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:44:19,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:44:19,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:44:19,206 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:44:19,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:44:19,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:44:19,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:44:19,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:44:19,208 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:44:19,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:44:19,208 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:44:19,208 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 19:44:19,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:44:19,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:44:19,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:44:19,209 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 19:44:19,209 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 19:44:19,209 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 19:44:19,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:44:19,210 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 19:44:19,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:44:19,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:44:19,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:44:19,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:44:19,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:44:19,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:44:19,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:44:19,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:44:19,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:44:19,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:44:19,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:44:19,212 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_5e3bac17-a250-45c1-91c7-df1935e24440/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c [2021-12-06 19:44:19,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:44:19,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:44:19,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:44:19,424 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:44:19,425 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:44:19,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-12-06 19:44:19,476 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/data/ba253a730/53728cdef9b341199ec8d51408727d19/FLAG2faf377d9 [2021-12-06 19:44:19,880 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:44:19,880 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-12-06 19:44:19,889 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/data/ba253a730/53728cdef9b341199ec8d51408727d19/FLAG2faf377d9 [2021-12-06 19:44:19,899 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/data/ba253a730/53728cdef9b341199ec8d51408727d19 [2021-12-06 19:44:19,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:44:19,902 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:44:19,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:44:19,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:44:19,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:44:19,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:44:19" (1/1) ... [2021-12-06 19:44:19,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7662ec70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:19, skipping insertion in model container [2021-12-06 19:44:19,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:44:19" (1/1) ... [2021-12-06 19:44:19,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:44:19,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:44:20,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:44:20,153 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 19:44:20,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@17992535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:20, skipping insertion in model container [2021-12-06 19:44:20,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:44:20,154 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-06 19:44:20,155 INFO L158 Benchmark]: Toolchain (without parser) took 252.28ms. Allocated memory is still 107.0MB. Free memory was 68.9MB in the beginning and 80.6MB in the end (delta: -11.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 19:44:20,156 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 107.0MB. Free memory was 86.3MB in the beginning and 86.2MB in the end (delta: 77.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:44:20,156 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.31ms. Allocated memory is still 107.0MB. Free memory was 68.7MB in the beginning and 80.6MB in the end (delta: -11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 19:44:20,158 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 107.0MB. Free memory was 86.3MB in the beginning and 86.2MB in the end (delta: 77.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.31ms. Allocated memory is still 107.0MB. Free memory was 68.7MB in the beginning and 80.6MB in the end (delta: -11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 535]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/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_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/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_5e3bac17-a250-45c1-91c7-df1935e24440/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 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:44:21,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:44:21,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:44:21,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:44:21,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:44:21,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:44:21,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:44:21,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:44:21,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:44:21,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:44:21,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:44:21,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:44:21,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:44:21,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:44:21,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:44:21,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:44:21,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:44:21,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:44:21,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:44:21,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:44:21,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:44:21,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:44:21,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:44:21,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:44:21,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:44:21,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:44:21,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:44:21,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:44:21,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:44:21,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:44:21,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:44:21,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:44:21,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:44:21,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:44:21,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:44:21,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:44:21,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:44:21,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:44:21,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:44:21,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:44:21,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:44:21,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 19:44:21,663 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:44:21,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:44:21,664 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:44:21,664 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:44:21,665 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:44:21,665 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:44:21,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:44:21,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:44:21,666 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:44:21,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:44:21,666 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:44:21,666 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 19:44:21,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:44:21,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:44:21,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:44:21,667 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 19:44:21,667 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 19:44:21,667 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 19:44:21,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:44:21,667 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 19:44:21,667 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 19:44:21,667 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 19:44:21,667 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:44:21,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:44:21,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:44:21,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:44:21,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:44:21,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:44:21,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:44:21,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:44:21,669 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 19:44:21,669 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 19:44:21,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:44:21,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 19:44:21,669 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_5e3bac17-a250-45c1-91c7-df1935e24440/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c [2021-12-06 19:44:21,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:44:21,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:44:21,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:44:21,910 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:44:21,911 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:44:21,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-12-06 19:44:21,953 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/data/e4ccf1f79/0a6f6fa179d44ca0902b24c86353065f/FLAG42b5ea1c3 [2021-12-06 19:44:22,356 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:44:22,356 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-12-06 19:44:22,365 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/data/e4ccf1f79/0a6f6fa179d44ca0902b24c86353065f/FLAG42b5ea1c3 [2021-12-06 19:44:22,374 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/data/e4ccf1f79/0a6f6fa179d44ca0902b24c86353065f [2021-12-06 19:44:22,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:44:22,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:44:22,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:44:22,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:44:22,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:44:22,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:44:22" (1/1) ... [2021-12-06 19:44:22,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76166369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:22, skipping insertion in model container [2021-12-06 19:44:22,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:44:22" (1/1) ... [2021-12-06 19:44:22,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:44:22,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:44:22,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:44:22,604 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-06 19:44:22,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:44:22,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:44:22,635 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:44:22,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:44:22,684 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:44:22,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:22 WrapperNode [2021-12-06 19:44:22,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:44:22,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:44:22,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:44:22,685 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:44:22,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:22" (1/1) ... [2021-12-06 19:44:22,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:22" (1/1) ... [2021-12-06 19:44:22,717 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-06 19:44:22,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:44:22,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:44:22,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:44:22,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:44:22,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:22" (1/1) ... [2021-12-06 19:44:22,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:22" (1/1) ... [2021-12-06 19:44:22,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:22" (1/1) ... [2021-12-06 19:44:22,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:22" (1/1) ... [2021-12-06 19:44:22,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:22" (1/1) ... [2021-12-06 19:44:22,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:22" (1/1) ... [2021-12-06 19:44:22,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:22" (1/1) ... [2021-12-06 19:44:22,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:44:22,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:44:22,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:44:22,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:44:22,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:22" (1/1) ... [2021-12-06 19:44:22,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:44:22,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:44:22,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:44:22,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:44:22,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-06 19:44:22,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:44:22,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:44:22,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 19:44:22,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:44:22,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:44:22,865 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:44:22,866 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:44:23,185 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:44:23,189 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:44:23,190 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 19:44:23,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:44:23 BoogieIcfgContainer [2021-12-06 19:44:23,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:44:23,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:44:23,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:44:23,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:44:23,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:44:22" (1/3) ... [2021-12-06 19:44:23,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad379d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:44:23, skipping insertion in model container [2021-12-06 19:44:23,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:44:22" (2/3) ... [2021-12-06 19:44:23,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad379d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:44:23, skipping insertion in model container [2021-12-06 19:44:23,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:44:23" (3/3) ... [2021-12-06 19:44:23,197 INFO L111 eAbstractionObserver]: Analyzing ICFG array03-alloca-2.i [2021-12-06 19:44:23,201 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:44:23,201 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-12-06 19:44:23,234 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:44:23,239 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 19:44:23,240 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-12-06 19:44:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 27 states have (on average 1.962962962962963) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 19:44:23,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:23,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 19:44:23,256 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:23,261 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-06 19:44:23,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:23,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308166120] [2021-12-06 19:44:23,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:23,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:23,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:23,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:23,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 19:44:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:23,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:44:23,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:23,413 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 19:44:23,427 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 19:44:23,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:44:23,428 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:23,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308166120] [2021-12-06 19:44:23,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308166120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:23,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:23,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:44:23,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633577303] [2021-12-06 19:44:23,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:23,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:44:23,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:23,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:44:23,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:44:23,457 INFO L87 Difference]: Start difference. First operand has 45 states, 27 states have (on average 1.962962962962963) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:23,559 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-12-06 19:44:23,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:44:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 19:44:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:23,569 INFO L225 Difference]: With dead ends: 44 [2021-12-06 19:44:23,570 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 19:44:23,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 19:44:23,575 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:23,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:44:23,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 19:44:23,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-06 19:44:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-12-06 19:44:23,603 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2021-12-06 19:44:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:23,603 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-12-06 19:44:23,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-12-06 19:44:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 19:44:23,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:23,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 19:44:23,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:44:23,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:23,806 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:23,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:23,808 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-12-06 19:44:23,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:23,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644078541] [2021-12-06 19:44:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:23,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:23,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:23,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:23,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 19:44:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:23,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:44:23,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:23,953 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 19:44:23,974 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 19:44:23,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:44:23,974 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:23,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644078541] [2021-12-06 19:44:23,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644078541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:23,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:23,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:44:23,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680402310] [2021-12-06 19:44:23,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:23,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:44:23,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:23,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:44:23,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:44:23,977 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:24,248 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2021-12-06 19:44:24,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:44:24,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 19:44:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:24,250 INFO L225 Difference]: With dead ends: 85 [2021-12-06 19:44:24,250 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 19:44:24,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 19:44:24,251 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 48 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:24,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 166 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:44:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 19:44:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 45. [2021-12-06 19:44:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-12-06 19:44:24,257 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 6 [2021-12-06 19:44:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:24,258 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-12-06 19:44:24,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:24,258 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-12-06 19:44:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 19:44:24,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:24,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 19:44:24,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 19:44:24,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:24,461 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:24,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:24,463 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-06 19:44:24,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:24,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129056854] [2021-12-06 19:44:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:24,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:24,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:24,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:24,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 19:44:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:24,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:44:24,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:24,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:44:24,618 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 19:44:24,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:44:24,618 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:24,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129056854] [2021-12-06 19:44:24,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129056854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:24,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:24,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:44:24,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942683076] [2021-12-06 19:44:24,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:24,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:44:24,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:44:24,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:44:24,620 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:24,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:24,646 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-12-06 19:44:24,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:44:24,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 19:44:24,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:24,648 INFO L225 Difference]: With dead ends: 47 [2021-12-06 19:44:24,648 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 19:44:24,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 19:44:24,649 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:24,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 107 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-06 19:44:24,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 19:44:24,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-06 19:44:24,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-06 19:44:24,656 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 6 [2021-12-06 19:44:24,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:24,656 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-06 19:44:24,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-06 19:44:24,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 19:44:24,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:24,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:24,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 19:44:24,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:24,859 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:24,861 INFO L85 PathProgramCache]: Analyzing trace with hash 176742579, now seen corresponding path program 1 times [2021-12-06 19:44:24,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:24,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553915134] [2021-12-06 19:44:24,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:24,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:24,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:24,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:24,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 19:44:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:24,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:44:24,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:24,939 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 19:44:24,952 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 19:44:24,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:44:24,953 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:24,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553915134] [2021-12-06 19:44:24,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553915134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:24,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:24,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:44:24,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169174136] [2021-12-06 19:44:24,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:24,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:44:24,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:24,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:44:24,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:44:24,954 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:25,094 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-06 19:44:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:44:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 19:44:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:25,095 INFO L225 Difference]: With dead ends: 39 [2021-12-06 19:44:25,095 INFO L226 Difference]: Without dead ends: 39 [2021-12-06 19:44:25,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 19:44:25,096 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:25,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:44:25,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-06 19:44:25,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-06 19:44:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.5) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:25,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-12-06 19:44:25,100 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 8 [2021-12-06 19:44:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:25,100 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-12-06 19:44:25,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:25,100 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-12-06 19:44:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 19:44:25,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:25,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:25,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 19:44:25,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:25,302 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:25,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:25,304 INFO L85 PathProgramCache]: Analyzing trace with hash 176742580, now seen corresponding path program 1 times [2021-12-06 19:44:25,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:25,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039582993] [2021-12-06 19:44:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:25,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:25,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:25,309 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:25,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 19:44:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:25,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 19:44:25,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:25,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:44:25,513 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 19:44:25,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:44:25,513 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:25,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039582993] [2021-12-06 19:44:25,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039582993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:25,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:25,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:44:25,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761818990] [2021-12-06 19:44:25,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:25,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:44:25,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:25,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:44:25,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:44:25,515 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:25,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:25,541 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-12-06 19:44:25,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:44:25,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 19:44:25,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:25,542 INFO L225 Difference]: With dead ends: 42 [2021-12-06 19:44:25,542 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 19:44:25,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:44:25,543 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:25,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2021-12-06 19:44:25,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 19:44:25,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-06 19:44:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-12-06 19:44:25,546 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 8 [2021-12-06 19:44:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:25,547 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-12-06 19:44:25,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-12-06 19:44:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 19:44:25,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:25,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:25,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 19:44:25,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:25,749 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052370, now seen corresponding path program 1 times [2021-12-06 19:44:25,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:25,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323046914] [2021-12-06 19:44:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:25,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:25,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:25,755 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:25,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 19:44:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:25,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:44:25,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:25,967 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 19:44:25,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:44:25,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:25,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323046914] [2021-12-06 19:44:25,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323046914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:25,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:25,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:44:25,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238001025] [2021-12-06 19:44:25,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:25,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:44:25,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:25,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:44:25,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:44:25,969 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:25,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:25,999 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-12-06 19:44:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:44:25,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 19:44:26,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:26,000 INFO L225 Difference]: With dead ends: 41 [2021-12-06 19:44:26,000 INFO L226 Difference]: Without dead ends: 41 [2021-12-06 19:44:26,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:44:26,001 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:26,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 65 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:44:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-06 19:44:26,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-12-06 19:44:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.5) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:26,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-12-06 19:44:26,004 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 9 [2021-12-06 19:44:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:26,004 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-12-06 19:44:26,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:26,004 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-12-06 19:44:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 19:44:26,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:26,005 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:26,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 19:44:26,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:26,206 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:26,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:26,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-12-06 19:44:26,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:26,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901923363] [2021-12-06 19:44:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:26,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:26,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:26,212 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:26,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 19:44:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:26,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:44:26,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:26,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:26,349 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:26,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901923363] [2021-12-06 19:44:26,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901923363] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:26,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:44:26,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 19:44:26,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297332427] [2021-12-06 19:44:26,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:26,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:44:26,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:26,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:44:26,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:44:26,351 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:26,402 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-12-06 19:44:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:44:26,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 19:44:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:26,403 INFO L225 Difference]: With dead ends: 69 [2021-12-06 19:44:26,403 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 19:44:26,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:44:26,404 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 187 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:26,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 127 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:44:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 19:44:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2021-12-06 19:44:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-12-06 19:44:26,408 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 10 [2021-12-06 19:44:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:26,408 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-12-06 19:44:26,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:26,408 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-12-06 19:44:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 19:44:26,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:26,409 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:26,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-06 19:44:26,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:26,610 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:26,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-06 19:44:26,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:26,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050337006] [2021-12-06 19:44:26,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:26,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:26,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:26,616 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:26,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 19:44:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:26,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 19:44:26,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:26,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:44:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:26,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:27,296 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:27,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050337006] [2021-12-06 19:44:27,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050337006] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:27,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:44:27,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-06 19:44:27,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757015395] [2021-12-06 19:44:27,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:27,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:44:27,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:27,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:44:27,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:44:27,297 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:27,946 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-12-06 19:44:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:44:27,948 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 19:44:27,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:27,949 INFO L225 Difference]: With dead ends: 77 [2021-12-06 19:44:27,949 INFO L226 Difference]: Without dead ends: 77 [2021-12-06 19:44:27,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:44:27,949 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 172 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:27,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 86 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 7 Unchecked, 0.6s Time] [2021-12-06 19:44:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-06 19:44:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2021-12-06 19:44:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.380952380952381) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-12-06 19:44:27,953 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 10 [2021-12-06 19:44:27,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:27,953 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-12-06 19:44:27,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:27,953 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-12-06 19:44:27,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 19:44:27,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:27,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:27,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 19:44:28,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:28,156 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:28,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:28,157 INFO L85 PathProgramCache]: Analyzing trace with hash -680998151, now seen corresponding path program 1 times [2021-12-06 19:44:28,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:28,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158771430] [2021-12-06 19:44:28,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:28,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:28,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:28,161 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:28,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 19:44:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:28,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 19:44:28,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:28,227 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 19:44:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:44:28,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:44:28,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:28,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158771430] [2021-12-06 19:44:28,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158771430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:28,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:28,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:44:28,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353423895] [2021-12-06 19:44:28,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:28,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:44:28,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:28,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:44:28,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:44:28,280 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:28,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:28,592 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2021-12-06 19:44:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:44:28,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 19:44:28,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:28,593 INFO L225 Difference]: With dead ends: 95 [2021-12-06 19:44:28,593 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 19:44:28,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 19:44:28,594 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:28,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 107 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:44:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 19:44:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2021-12-06 19:44:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2021-12-06 19:44:28,598 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 12 [2021-12-06 19:44:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:28,598 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2021-12-06 19:44:28,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2021-12-06 19:44:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 19:44:28,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:28,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:28,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-06 19:44:28,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:28,800 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:28,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:28,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025161, now seen corresponding path program 1 times [2021-12-06 19:44:28,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:28,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127667563] [2021-12-06 19:44:28,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:28,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:28,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:28,805 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:28,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 19:44:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:28,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 19:44:28,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:28,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:44:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:29,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:29,379 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:29,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127667563] [2021-12-06 19:44:29,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127667563] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 19:44:29,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:44:29,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-06 19:44:29,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292100732] [2021-12-06 19:44:29,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:29,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:44:29,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:29,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:44:29,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:44:29,381 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:29,702 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2021-12-06 19:44:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:44:29,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 19:44:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:29,703 INFO L225 Difference]: With dead ends: 65 [2021-12-06 19:44:29,703 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 19:44:29,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:44:29,704 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:29,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 36 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:44:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 19:44:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2021-12-06 19:44:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-06 19:44:29,708 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 12 [2021-12-06 19:44:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:29,708 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-06 19:44:29,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-06 19:44:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 19:44:29,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:29,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:29,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 19:44:29,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:29,911 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash 363893485, now seen corresponding path program 1 times [2021-12-06 19:44:29,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:29,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569053801] [2021-12-06 19:44:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:29,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:29,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:29,916 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:29,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 19:44:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:29,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:44:29,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:44:29,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:44:29,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569053801] [2021-12-06 19:44:29,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569053801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:29,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:29,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:44:29,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113995476] [2021-12-06 19:44:29,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:29,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:44:29,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:44:29,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:44:29,990 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:30,132 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2021-12-06 19:44:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:44:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 19:44:30,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:30,134 INFO L225 Difference]: With dead ends: 82 [2021-12-06 19:44:30,134 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 19:44:30,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 19:44:30,135 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:30,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 81 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:44:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 19:44:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 49. [2021-12-06 19:44:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-06 19:44:30,138 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2021-12-06 19:44:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:30,138 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-06 19:44:30,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-06 19:44:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 19:44:30,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:30,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:30,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 19:44:30,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:30,340 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:30,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:30,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958063, now seen corresponding path program 1 times [2021-12-06 19:44:30,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:30,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784379951] [2021-12-06 19:44:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:30,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:30,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:30,343 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:30,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 19:44:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:30,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:44:30,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:30,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:30,575 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:30,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784379951] [2021-12-06 19:44:30,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784379951] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:30,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:44:30,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-06 19:44:30,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244908606] [2021-12-06 19:44:30,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:30,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 19:44:30,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:30,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 19:44:30,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:44:30,576 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:30,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:30,897 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-12-06 19:44:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:44:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 19:44:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:30,899 INFO L225 Difference]: With dead ends: 84 [2021-12-06 19:44:30,899 INFO L226 Difference]: Without dead ends: 84 [2021-12-06 19:44:30,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:44:30,900 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 253 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:30,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 99 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:44:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-06 19:44:30,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 47. [2021-12-06 19:44:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-06 19:44:30,902 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 13 [2021-12-06 19:44:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:30,903 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-06 19:44:30,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-06 19:44:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 19:44:30,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:30,904 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-06 19:44:30,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 19:44:31,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:31,105 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:31,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:31,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-12-06 19:44:31,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:31,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620319326] [2021-12-06 19:44:31,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:44:31,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:31,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:31,110 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:31,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 19:44:31,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:44:31,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:44:31,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 19:44:31,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:31,220 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 8 treesize of output 7 [2021-12-06 19:44:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:31,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:32,331 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:32,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620319326] [2021-12-06 19:44:32,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620319326] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:32,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:44:32,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-06 19:44:32,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176680182] [2021-12-06 19:44:32,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:32,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:44:32,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:44:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:44:32,333 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:34,917 INFO L93 Difference]: Finished difference Result 173 states and 199 transitions. [2021-12-06 19:44:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 19:44:34,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 19:44:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:34,919 INFO L225 Difference]: With dead ends: 173 [2021-12-06 19:44:34,920 INFO L226 Difference]: Without dead ends: 173 [2021-12-06 19:44:34,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:44:34,921 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 247 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:34,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 376 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 249 Invalid, 0 Unknown, 67 Unchecked, 1.2s Time] [2021-12-06 19:44:34,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-06 19:44:34,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 63. [2021-12-06 19:44:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2021-12-06 19:44:34,925 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 18 [2021-12-06 19:44:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:34,925 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2021-12-06 19:44:34,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2021-12-06 19:44:34,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 19:44:34,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:34,926 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:34,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-06 19:44:35,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:35,128 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:35,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:35,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1194451038, now seen corresponding path program 1 times [2021-12-06 19:44:35,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:35,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652275700] [2021-12-06 19:44:35,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:35,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:35,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:35,134 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:35,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 19:44:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:35,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:44:35,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:44:35,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:44:35,314 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:35,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652275700] [2021-12-06 19:44:35,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652275700] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:35,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:44:35,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 19:44:35,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574698165] [2021-12-06 19:44:35,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:35,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:44:35,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:35,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:44:35,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:44:35,315 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:35,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:35,444 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-12-06 19:44:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:44:35,445 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 19:44:35,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:35,446 INFO L225 Difference]: With dead ends: 83 [2021-12-06 19:44:35,446 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 19:44:35,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:44:35,447 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:35,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 102 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:44:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 19:44:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-12-06 19:44:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 79 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2021-12-06 19:44:35,450 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 19 [2021-12-06 19:44:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:35,450 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2021-12-06 19:44:35,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2021-12-06 19:44:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 19:44:35,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:35,451 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:35,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 19:44:35,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:35,652 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:35,653 INFO L85 PathProgramCache]: Analyzing trace with hash -393896864, now seen corresponding path program 1 times [2021-12-06 19:44:35,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:35,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116739980] [2021-12-06 19:44:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:35,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:35,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:35,657 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:35,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 19:44:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:35,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:44:35,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:35,742 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 8 treesize of output 7 [2021-12-06 19:44:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:44:35,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:44:36,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:36,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116739980] [2021-12-06 19:44:36,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116739980] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:36,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:44:36,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-06 19:44:36,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684860801] [2021-12-06 19:44:36,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:36,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 19:44:36,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 19:44:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:44:36,645 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:37,493 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2021-12-06 19:44:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 19:44:37,495 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 19:44:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:37,495 INFO L225 Difference]: With dead ends: 115 [2021-12-06 19:44:37,495 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 19:44:37,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:44:37,496 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 139 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:37,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 129 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 105 Invalid, 0 Unknown, 20 Unchecked, 0.5s Time] [2021-12-06 19:44:37,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 19:44:37,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2021-12-06 19:44:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.233644859813084) internal successors, (132), 109 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2021-12-06 19:44:37,501 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 19 [2021-12-06 19:44:37,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:37,501 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2021-12-06 19:44:37,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:37,501 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2021-12-06 19:44:37,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 19:44:37,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:37,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:37,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 19:44:37,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:37,703 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:37,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:37,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1626723800, now seen corresponding path program 1 times [2021-12-06 19:44:37,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:37,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019695248] [2021-12-06 19:44:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:37,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:37,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:37,708 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:37,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 19:44:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:37,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:44:37,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:44:37,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:44:37,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:37,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019695248] [2021-12-06 19:44:37,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019695248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:37,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:37,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:44:37,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550766391] [2021-12-06 19:44:37,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:37,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:44:37,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:44:37,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:44:37,879 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:37,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:37,899 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2021-12-06 19:44:37,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:44:37,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 19:44:37,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:37,900 INFO L225 Difference]: With dead ends: 144 [2021-12-06 19:44:37,900 INFO L226 Difference]: Without dead ends: 139 [2021-12-06 19:44:37,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:44:37,900 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:37,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 62 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-06 19:44:37,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-06 19:44:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2021-12-06 19:44:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 129 states have (on average 1.2403100775193798) internal successors, (160), 131 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 160 transitions. [2021-12-06 19:44:37,904 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 160 transitions. Word has length 20 [2021-12-06 19:44:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:37,904 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 160 transitions. [2021-12-06 19:44:37,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 160 transitions. [2021-12-06 19:44:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 19:44:37,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:37,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:37,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-06 19:44:38,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:38,106 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:38,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:38,107 INFO L85 PathProgramCache]: Analyzing trace with hash 943948737, now seen corresponding path program 1 times [2021-12-06 19:44:38,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:38,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208205818] [2021-12-06 19:44:38,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:38,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:38,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:38,108 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:38,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 19:44:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:38,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:44:38,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:44:38,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:44:38,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:38,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208205818] [2021-12-06 19:44:38,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208205818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:38,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:38,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:44:38,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610167390] [2021-12-06 19:44:38,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:38,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:44:38,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:38,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:44:38,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:44:38,347 INFO L87 Difference]: Start difference. First operand 132 states and 160 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:38,366 INFO L93 Difference]: Finished difference Result 168 states and 206 transitions. [2021-12-06 19:44:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:44:38,366 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 19:44:38,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:38,367 INFO L225 Difference]: With dead ends: 168 [2021-12-06 19:44:38,367 INFO L226 Difference]: Without dead ends: 163 [2021-12-06 19:44:38,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:44:38,368 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:38,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-06 19:44:38,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-06 19:44:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 136. [2021-12-06 19:44:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 135 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 166 transitions. [2021-12-06 19:44:38,371 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 166 transitions. Word has length 22 [2021-12-06 19:44:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:38,371 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 166 transitions. [2021-12-06 19:44:38,371 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:38,371 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 166 transitions. [2021-12-06 19:44:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 19:44:38,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:38,372 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:38,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 19:44:38,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:38,573 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:38,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:38,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1425250584, now seen corresponding path program 1 times [2021-12-06 19:44:38,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:38,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476532235] [2021-12-06 19:44:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:38,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:38,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:38,578 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:38,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 19:44:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:38,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:44:38,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:38,763 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-12-06 19:44:38,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2021-12-06 19:44:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:44:38,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:44:38,800 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:38,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476532235] [2021-12-06 19:44:38,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476532235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:38,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:38,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:44:38,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085980747] [2021-12-06 19:44:38,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:38,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:44:38,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:44:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:44:38,801 INFO L87 Difference]: Start difference. First operand 136 states and 166 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:38,952 INFO L93 Difference]: Finished difference Result 148 states and 177 transitions. [2021-12-06 19:44:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:44:38,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 19:44:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:38,954 INFO L225 Difference]: With dead ends: 148 [2021-12-06 19:44:38,954 INFO L226 Difference]: Without dead ends: 146 [2021-12-06 19:44:38,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:44:38,955 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:38,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2021-12-06 19:44:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-06 19:44:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-12-06 19:44:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 143 states have (on average 1.2237762237762237) internal successors, (175), 145 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:38,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2021-12-06 19:44:38,958 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 28 [2021-12-06 19:44:38,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:38,958 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2021-12-06 19:44:38,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2021-12-06 19:44:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 19:44:38,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:38,959 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:38,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 19:44:39,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:39,160 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:39,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:39,162 INFO L85 PathProgramCache]: Analyzing trace with hash 212486577, now seen corresponding path program 1 times [2021-12-06 19:44:39,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:39,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182369206] [2021-12-06 19:44:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:39,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:39,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:39,166 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:39,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 19:44:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:39,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:44:39,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:39,343 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-12-06 19:44:39,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2021-12-06 19:44:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:44:39,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:44:39,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182369206] [2021-12-06 19:44:39,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182369206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:39,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:39,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:44:39,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039756144] [2021-12-06 19:44:39,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:39,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:44:39,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:39,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:44:39,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:44:39,558 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:39,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:39,716 INFO L93 Difference]: Finished difference Result 158 states and 186 transitions. [2021-12-06 19:44:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:44:39,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 19:44:39,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:39,718 INFO L225 Difference]: With dead ends: 158 [2021-12-06 19:44:39,718 INFO L226 Difference]: Without dead ends: 156 [2021-12-06 19:44:39,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:44:39,718 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:39,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2021-12-06 19:44:39,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-06 19:44:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2021-12-06 19:44:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 143 states have (on average 1.2167832167832169) internal successors, (174), 145 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:39,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 174 transitions. [2021-12-06 19:44:39,722 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 174 transitions. Word has length 30 [2021-12-06 19:44:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:39,722 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 174 transitions. [2021-12-06 19:44:39,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 174 transitions. [2021-12-06 19:44:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 19:44:39,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:39,722 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:39,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-06 19:44:39,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:39,923 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:39,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:39,924 INFO L85 PathProgramCache]: Analyzing trace with hash -808581777, now seen corresponding path program 1 times [2021-12-06 19:44:39,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:39,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107464528] [2021-12-06 19:44:39,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:39,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:39,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:39,929 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:39,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 19:44:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:40,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:44:40,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:40,137 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 19:44:40,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:44:40,137 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:40,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107464528] [2021-12-06 19:44:40,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107464528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:44:40,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:44:40,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:44:40,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443831812] [2021-12-06 19:44:40,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:44:40,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:44:40,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:40,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:44:40,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:44:40,138 INFO L87 Difference]: Start difference. First operand 146 states and 174 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:40,142 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2021-12-06 19:44:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:44:40,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 19:44:40,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:40,144 INFO L225 Difference]: With dead ends: 145 [2021-12-06 19:44:40,144 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 19:44:40,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:44:40,144 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:40,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 65 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-12-06 19:44:40,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 19:44:40,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2021-12-06 19:44:40,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 89 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2021-12-06 19:44:40,147 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 30 [2021-12-06 19:44:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:40,147 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2021-12-06 19:44:40,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2021-12-06 19:44:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 19:44:40,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:40,148 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:40,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-06 19:44:40,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:40,349 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:40,350 INFO L85 PathProgramCache]: Analyzing trace with hash -521097088, now seen corresponding path program 2 times [2021-12-06 19:44:40,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:40,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70857034] [2021-12-06 19:44:40,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:44:40,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:40,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:40,354 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:40,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 19:44:40,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:44:40,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:44:40,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:44:40,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:40,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:44:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:44:40,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:42,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70857034] [2021-12-06 19:44:42,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70857034] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:42,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:44:42,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-12-06 19:44:42,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329763946] [2021-12-06 19:44:42,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:42,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 19:44:42,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:42,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 19:44:42,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:44:42,646 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:43,392 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2021-12-06 19:44:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:44:43,393 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 19:44:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:43,394 INFO L225 Difference]: With dead ends: 107 [2021-12-06 19:44:43,394 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 19:44:43,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:44:43,395 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:43,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 138 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 10 Unchecked, 0.6s Time] [2021-12-06 19:44:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 19:44:43,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2021-12-06 19:44:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 100 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2021-12-06 19:44:43,398 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 33 [2021-12-06 19:44:43,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:43,399 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2021-12-06 19:44:43,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:43,399 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2021-12-06 19:44:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 19:44:43,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:43,400 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-12-06 19:44:43,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-06 19:44:43,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:43,600 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:43,601 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-12-06 19:44:43,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:43,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84032064] [2021-12-06 19:44:43,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:44:43,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:43,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:43,607 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:43,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 19:44:43,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 19:44:43,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:44:43,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:44:43,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:43,773 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 8 treesize of output 7 [2021-12-06 19:44:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:44,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:44:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:44:46,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:44:46,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84032064] [2021-12-06 19:44:46,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84032064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:44:46,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:44:46,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-06 19:44:46,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787111017] [2021-12-06 19:44:46,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:44:46,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 19:44:46,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:44:46,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 19:44:46,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:44:46,248 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:44:57,588 INFO L93 Difference]: Finished difference Result 844 states and 985 transitions. [2021-12-06 19:44:57,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 19:44:57,589 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 19:44:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:44:57,593 INFO L225 Difference]: With dead ends: 844 [2021-12-06 19:44:57,593 INFO L226 Difference]: Without dead ends: 844 [2021-12-06 19:44:57,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 19:44:57,594 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1704 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:44:57,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 795 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 883 Invalid, 0 Unknown, 19 Unchecked, 3.6s Time] [2021-12-06 19:44:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-12-06 19:44:57,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 133. [2021-12-06 19:44:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 131 states have (on average 1.2061068702290076) internal successors, (158), 132 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 158 transitions. [2021-12-06 19:44:57,600 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 158 transitions. Word has length 34 [2021-12-06 19:44:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:44:57,600 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 158 transitions. [2021-12-06 19:44:57,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:44:57,602 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 158 transitions. [2021-12-06 19:44:57,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 19:44:57,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:44:57,603 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:44:57,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 19:44:57,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:44:57,804 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:44:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:44:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash -701692519, now seen corresponding path program 1 times [2021-12-06 19:44:57,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:44:57,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266107007] [2021-12-06 19:44:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:44:57,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:44:57,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:44:57,809 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:44:57,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 19:44:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:44:57,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:44:57,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:44:57,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:44:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:44:58,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:45:00,154 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:45:00,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266107007] [2021-12-06 19:45:00,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266107007] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:00,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:45:00,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-12-06 19:45:00,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235707272] [2021-12-06 19:45:00,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:00,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 19:45:00,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:45:00,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 19:45:00,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:45:00,156 INFO L87 Difference]: Start difference. First operand 133 states and 158 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:00,798 INFO L93 Difference]: Finished difference Result 138 states and 162 transitions. [2021-12-06 19:45:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:45:00,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-06 19:45:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:00,800 INFO L225 Difference]: With dead ends: 138 [2021-12-06 19:45:00,800 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 19:45:00,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:45:00,800 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:00,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 190 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 123 Invalid, 0 Unknown, 35 Unchecked, 0.5s Time] [2021-12-06 19:45:00,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 19:45:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2021-12-06 19:45:00,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 125 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 150 transitions. [2021-12-06 19:45:00,805 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 150 transitions. Word has length 35 [2021-12-06 19:45:00,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:00,805 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 150 transitions. [2021-12-06 19:45:00,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:00,805 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 150 transitions. [2021-12-06 19:45:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 19:45:00,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:00,806 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:00,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 19:45:01,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:45:01,007 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:45:01,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:01,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1227137273, now seen corresponding path program 2 times [2021-12-06 19:45:01,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:45:01,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433285849] [2021-12-06 19:45:01,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:45:01,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:45:01,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:45:01,012 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:45:01,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 19:45:01,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:45:01,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:45:01,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:01,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:45:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:45:01,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:45:03,003 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:45:03,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433285849] [2021-12-06 19:45:03,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433285849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:03,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:45:03,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-06 19:45:03,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472791132] [2021-12-06 19:45:03,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:03,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 19:45:03,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:45:03,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 19:45:03,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:45:03,006 INFO L87 Difference]: Start difference. First operand 126 states and 150 transitions. Second operand has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:06,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:06,133 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2021-12-06 19:45:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 19:45:06,135 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-06 19:45:06,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:06,135 INFO L225 Difference]: With dead ends: 195 [2021-12-06 19:45:06,135 INFO L226 Difference]: Without dead ends: 195 [2021-12-06 19:45:06,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2021-12-06 19:45:06,136 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 307 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:06,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 252 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 233 Invalid, 0 Unknown, 68 Unchecked, 1.1s Time] [2021-12-06 19:45:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-06 19:45:06,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2021-12-06 19:45:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.1979166666666667) internal successors, (230), 193 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:06,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 230 transitions. [2021-12-06 19:45:06,140 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 230 transitions. Word has length 35 [2021-12-06 19:45:06,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:06,140 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 230 transitions. [2021-12-06 19:45:06,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 230 transitions. [2021-12-06 19:45:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 19:45:06,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:06,141 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:06,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-06 19:45:06,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:45:06,341 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:45:06,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:06,342 INFO L85 PathProgramCache]: Analyzing trace with hash -856498489, now seen corresponding path program 3 times [2021-12-06 19:45:06,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:45:06,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061069616] [2021-12-06 19:45:06,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:45:06,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:45:06,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:45:06,343 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:45:06,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-06 19:45:06,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 19:45:06,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:06,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:45:06,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:06,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:45:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 71 proven. 1 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 19:45:07,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 19:45:10,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:45:10,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061069616] [2021-12-06 19:45:10,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061069616] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:10,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:45:10,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-06 19:45:10,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303555187] [2021-12-06 19:45:10,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:10,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:45:10,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:45:10,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:45:10,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:45:10,549 INFO L87 Difference]: Start difference. First operand 194 states and 230 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:10,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:45:10,800 INFO L93 Difference]: Finished difference Result 284 states and 334 transitions. [2021-12-06 19:45:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:45:10,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-06 19:45:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:45:10,802 INFO L225 Difference]: With dead ends: 284 [2021-12-06 19:45:10,802 INFO L226 Difference]: Without dead ends: 278 [2021-12-06 19:45:10,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:45:10,803 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:45:10,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 166 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2021-12-06 19:45:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-06 19:45:10,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 270. [2021-12-06 19:45:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 268 states have (on average 1.1977611940298507) internal successors, (321), 269 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:10,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 321 transitions. [2021-12-06 19:45:10,807 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 321 transitions. Word has length 63 [2021-12-06 19:45:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:45:10,808 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 321 transitions. [2021-12-06 19:45:10,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:45:10,808 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 321 transitions. [2021-12-06 19:45:10,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 19:45:10,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:45:10,808 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:45:10,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-06 19:45:11,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:45:11,009 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:45:11,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:45:11,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1772212195, now seen corresponding path program 3 times [2021-12-06 19:45:11,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:45:11,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406982716] [2021-12-06 19:45:11,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:45:11,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:45:11,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:45:11,014 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:45:11,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 19:45:11,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 19:45:11,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:45:11,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 19:45:11,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:45:11,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:45:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 97 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-06 19:45:12,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:45:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-06 19:45:52,841 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:45:52,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406982716] [2021-12-06 19:45:52,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406982716] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:45:52,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:45:52,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-12-06 19:45:52,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357148356] [2021-12-06 19:45:52,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:45:52,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:45:52,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:45:52,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:45:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=546, Unknown=1, NotChecked=0, Total=650 [2021-12-06 19:45:52,843 INFO L87 Difference]: Start difference. First operand 270 states and 321 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:09,615 WARN L227 SmtUtils]: Spent 14.11s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:46:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:46:12,197 INFO L93 Difference]: Finished difference Result 299 states and 352 transitions. [2021-12-06 19:46:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 19:46:12,197 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 19:46:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:46:12,199 INFO L225 Difference]: With dead ends: 299 [2021-12-06 19:46:12,199 INFO L226 Difference]: Without dead ends: 298 [2021-12-06 19:46:12,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=161, Invalid=829, Unknown=2, NotChecked=0, Total=992 [2021-12-06 19:46:12,200 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:46:12,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 280 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 178 Unchecked, 1.6s Time] [2021-12-06 19:46:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-06 19:46:12,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 288. [2021-12-06 19:46:12,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 286 states have (on average 1.1923076923076923) internal successors, (341), 287 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 341 transitions. [2021-12-06 19:46:12,209 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 341 transitions. Word has length 65 [2021-12-06 19:46:12,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:46:12,209 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 341 transitions. [2021-12-06 19:46:12,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:12,209 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 341 transitions. [2021-12-06 19:46:12,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 19:46:12,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:46:12,210 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-12-06 19:46:12,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-06 19:46:12,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:46:12,412 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:46:12,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:46:12,413 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-12-06 19:46:12,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:46:12,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174297963] [2021-12-06 19:46:12,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:46:12,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:46:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:46:12,416 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:46:12,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-06 19:46:12,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:46:12,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:46:12,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 19:46:12,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:46:12,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:46:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:46:16,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:46:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:46:29,876 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:46:29,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174297963] [2021-12-06 19:46:29,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174297963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:46:29,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:46:29,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-12-06 19:46:29,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664432608] [2021-12-06 19:46:29,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:46:29,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 19:46:29,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:46:29,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 19:46:29,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 19:46:29,878 INFO L87 Difference]: Start difference. First operand 288 states and 341 transitions. Second operand has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:46:53,388 WARN L227 SmtUtils]: Spent 11.71s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:46:55,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:46:57,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:46:59,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:47:11,817 WARN L227 SmtUtils]: Spent 10.85s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:47:32,029 WARN L227 SmtUtils]: Spent 19.23s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:47:34,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:47:36,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:47:38,904 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:47:40,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:47:50,469 WARN L227 SmtUtils]: Spent 9.45s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:48:07,310 WARN L227 SmtUtils]: Spent 15.51s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:48:10,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:48:12,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:48:14,290 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:48:22,382 WARN L227 SmtUtils]: Spent 7.51s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:48:36,510 WARN L227 SmtUtils]: Spent 12.93s on a formula simplification. DAG size of input: 141 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:48:39,117 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:48:41,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:48:43,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:48:59,951 WARN L227 SmtUtils]: Spent 9.89s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:49:02,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:49:04,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:49:06,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:49:21,693 WARN L227 SmtUtils]: Spent 8.68s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:49:24,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:49:26,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:49:28,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:49:39,294 WARN L227 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 109 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:49:41,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:49:43,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:49:45,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:49:54,402 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 98 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:49:57,133 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:49:59,136 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:50:09,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:50:11,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:50:19,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:50:21,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:50:27,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:50:29,277 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:50:34,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:50:39,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:50:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:50:45,289 INFO L93 Difference]: Finished difference Result 3907 states and 4582 transitions. [2021-12-06 19:50:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 19:50:45,291 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 19:50:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:50:45,305 INFO L225 Difference]: With dead ends: 3907 [2021-12-06 19:50:45,305 INFO L226 Difference]: Without dead ends: 3907 [2021-12-06 19:50:45,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2426 ImplicationChecksByTransitivity, 177.1s TimeCoverageRelationStatistics Valid=2210, Invalid=5272, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 19:50:45,307 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 5253 mSDsluCounter, 3488 mSDsCounter, 0 mSdLazyCounter, 4028 mSolverCounterSat, 172 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5253 SdHoareTripleChecker+Valid, 3672 SdHoareTripleChecker+Invalid, 4291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 4028 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 88.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:50:45,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5253 Valid, 3672 Invalid, 4291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 4028 Invalid, 29 Unknown, 62 Unchecked, 88.2s Time] [2021-12-06 19:50:45,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-12-06 19:50:45,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 352. [2021-12-06 19:50:45,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 350 states have (on average 1.2028571428571428) internal successors, (421), 351 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:50:45,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 421 transitions. [2021-12-06 19:50:45,327 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 421 transitions. Word has length 66 [2021-12-06 19:50:45,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:50:45,327 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 421 transitions. [2021-12-06 19:50:45,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:50:45,327 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 421 transitions. [2021-12-06 19:50:45,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 19:50:45,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:50:45,328 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:50:45,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-06 19:50:45,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:50:45,529 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:50:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:50:45,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1312455460, now seen corresponding path program 4 times [2021-12-06 19:50:45,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:50:45,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449598051] [2021-12-06 19:50:45,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:50:45,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:50:45,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:50:45,535 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:50:45,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-06 19:50:45,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:50:45,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:50:45,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 19:50:45,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:50:45,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:50:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 19:50:47,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:50:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:50:53,983 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:50:53,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449598051] [2021-12-06 19:50:53,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449598051] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:50:53,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:50:53,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2021-12-06 19:50:53,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606287412] [2021-12-06 19:50:53,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:50:53,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 19:50:53,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:50:53,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 19:50:53,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-12-06 19:50:53,984 INFO L87 Difference]: Start difference. First operand 352 states and 421 transitions. Second operand has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:51:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:51:47,311 INFO L93 Difference]: Finished difference Result 859 states and 1010 transitions. [2021-12-06 19:51:47,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 19:51:47,313 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-06 19:51:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:51:47,316 INFO L225 Difference]: With dead ends: 859 [2021-12-06 19:51:47,316 INFO L226 Difference]: Without dead ends: 848 [2021-12-06 19:51:47,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=629, Invalid=4201, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 19:51:47,318 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 814 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 2427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:51:47,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 2294 Invalid, 2427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2052 Invalid, 0 Unknown, 326 Unchecked, 27.2s Time] [2021-12-06 19:51:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-12-06 19:51:47,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 374. [2021-12-06 19:51:47,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 372 states have (on average 1.2016129032258065) internal successors, (447), 373 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:51:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 447 transitions. [2021-12-06 19:51:47,329 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 447 transitions. Word has length 67 [2021-12-06 19:51:47,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:51:47,329 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 447 transitions. [2021-12-06 19:51:47,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:51:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 447 transitions. [2021-12-06 19:51:47,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 19:51:47,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:51:47,330 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:51:47,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-06 19:51:47,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:51:47,531 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:51:47,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:51:47,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1851526538, now seen corresponding path program 5 times [2021-12-06 19:51:47,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:51:47,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661895534] [2021-12-06 19:51:47,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:51:47,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:51:47,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:51:47,533 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:51:47,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-06 19:51:47,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 19:51:47,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:51:47,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 19:51:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:51:47,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:51:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 19:51:49,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:51:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:51:56,180 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:51:56,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661895534] [2021-12-06 19:51:56,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661895534] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:51:56,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:51:56,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2021-12-06 19:51:56,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393105700] [2021-12-06 19:51:56,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:51:56,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 19:51:56,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:51:56,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 19:51:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-12-06 19:51:56,182 INFO L87 Difference]: Start difference. First operand 374 states and 447 transitions. Second operand has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:52:16,204 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:52:27,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:52:27,746 INFO L93 Difference]: Finished difference Result 833 states and 980 transitions. [2021-12-06 19:52:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 19:52:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-06 19:52:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:52:27,751 INFO L225 Difference]: With dead ends: 833 [2021-12-06 19:52:27,751 INFO L226 Difference]: Without dead ends: 832 [2021-12-06 19:52:27,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=345, Invalid=2517, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 19:52:27,753 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 379 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:52:27,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 1417 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1201 Invalid, 0 Unknown, 254 Unchecked, 18.1s Time] [2021-12-06 19:52:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-12-06 19:52:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 469. [2021-12-06 19:52:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 467 states have (on average 1.1948608137044967) internal successors, (558), 468 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:52:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 558 transitions. [2021-12-06 19:52:27,764 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 558 transitions. Word has length 67 [2021-12-06 19:52:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:52:27,764 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 558 transitions. [2021-12-06 19:52:27,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:52:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 558 transitions. [2021-12-06 19:52:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 19:52:27,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:52:27,765 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:52:27,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-06 19:52:27,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:52:27,966 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:52:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:52:27,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1209465572, now seen corresponding path program 6 times [2021-12-06 19:52:27,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:52:27,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858336214] [2021-12-06 19:52:27,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 19:52:27,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:52:27,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:52:27,972 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:52:27,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-06 19:52:28,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 19:52:28,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:52:28,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:52:28,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:52:28,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:52:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 19:52:29,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:52:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 87 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 19:52:31,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:52:31,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858336214] [2021-12-06 19:52:31,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858336214] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:52:31,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:52:31,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-06 19:52:31,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491049601] [2021-12-06 19:52:31,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:52:31,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 19:52:31,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:52:31,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 19:52:31,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:52:31,311 INFO L87 Difference]: Start difference. First operand 469 states and 558 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:52:31,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:52:31,854 INFO L93 Difference]: Finished difference Result 606 states and 712 transitions. [2021-12-06 19:52:31,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 19:52:31,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-06 19:52:31,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:52:31,858 INFO L225 Difference]: With dead ends: 606 [2021-12-06 19:52:31,858 INFO L226 Difference]: Without dead ends: 570 [2021-12-06 19:52:31,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:52:31,859 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:52:31,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 240 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 63 Invalid, 0 Unknown, 84 Unchecked, 0.3s Time] [2021-12-06 19:52:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-12-06 19:52:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 551. [2021-12-06 19:52:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 549 states have (on average 1.1967213114754098) internal successors, (657), 550 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:52:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 657 transitions. [2021-12-06 19:52:31,867 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 657 transitions. Word has length 67 [2021-12-06 19:52:31,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:52:31,867 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 657 transitions. [2021-12-06 19:52:31,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:52:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 657 transitions. [2021-12-06 19:52:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 19:52:31,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:52:31,869 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:52:31,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-12-06 19:52:32,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:52:32,070 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:52:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:52:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1784706217, now seen corresponding path program 4 times [2021-12-06 19:52:32,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:52:32,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115038773] [2021-12-06 19:52:32,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 19:52:32,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:52:32,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:52:32,075 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:52:32,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-06 19:52:32,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 19:52:32,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:52:32,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 19:52:32,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:52:32,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:52:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:52:34,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:52:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:52:45,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:52:45,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115038773] [2021-12-06 19:52:45,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115038773] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:52:45,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:52:45,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 33 [2021-12-06 19:52:45,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100766759] [2021-12-06 19:52:45,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:52:45,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:52:45,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:52:45,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:52:45,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:52:45,630 INFO L87 Difference]: Start difference. First operand 551 states and 657 transitions. Second operand has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 33 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:53:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:53:37,494 INFO L93 Difference]: Finished difference Result 1275 states and 1502 transitions. [2021-12-06 19:53:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 19:53:37,496 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 33 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-06 19:53:37,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:53:37,501 INFO L225 Difference]: With dead ends: 1275 [2021-12-06 19:53:37,501 INFO L226 Difference]: Without dead ends: 1269 [2021-12-06 19:53:37,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 41.6s TimeCoverageRelationStatistics Valid=835, Invalid=5645, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 19:53:37,503 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 1051 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 2830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 879 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:53:37,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 2457 Invalid, 2830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1880 Invalid, 0 Unknown, 879 Unchecked, 17.6s Time] [2021-12-06 19:53:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-12-06 19:53:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 735. [2021-12-06 19:53:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 733 states have (on average 1.193724420190996) internal successors, (875), 734 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:53:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 875 transitions. [2021-12-06 19:53:37,517 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 875 transitions. Word has length 73 [2021-12-06 19:53:37,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:53:37,518 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 875 transitions. [2021-12-06 19:53:37,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 33 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:53:37,518 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 875 transitions. [2021-12-06 19:53:37,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 19:53:37,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:53:37,520 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:53:37,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-06 19:53:37,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:53:37,721 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:53:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:53:37,722 INFO L85 PathProgramCache]: Analyzing trace with hash -973379792, now seen corresponding path program 7 times [2021-12-06 19:53:37,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:53:37,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162765048] [2021-12-06 19:53:37,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 19:53:37,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:53:37,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:53:37,726 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:53:37,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-06 19:53:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:53:37,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 19:53:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:53:37,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:53:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 74 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 19:53:40,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:53:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:53:51,821 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:53:51,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162765048] [2021-12-06 19:53:51,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162765048] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:53:51,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:53:51,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 33 [2021-12-06 19:53:51,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125076353] [2021-12-06 19:53:51,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:53:51,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:53:51,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:53:51,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:53:51,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:53:51,822 INFO L87 Difference]: Start difference. First operand 735 states and 875 transitions. Second operand has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:54:28,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:54:31,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:55:22,488 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:55:25,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:55:27,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:55:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:55:29,770 INFO L93 Difference]: Finished difference Result 1485 states and 1745 transitions. [2021-12-06 19:55:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-06 19:55:29,772 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 19:55:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:55:29,777 INFO L225 Difference]: With dead ends: 1485 [2021-12-06 19:55:29,777 INFO L226 Difference]: Without dead ends: 1479 [2021-12-06 19:55:29,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 129 SyntacticMatches, 8 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3236 ImplicationChecksByTransitivity, 69.5s TimeCoverageRelationStatistics Valid=1067, Invalid=9645, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 19:55:29,781 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 1250 mSDsluCounter, 2657 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 2846 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 36.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:55:29,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 2846 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2419 Invalid, 0 Unknown, 510 Unchecked, 36.1s Time] [2021-12-06 19:55:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-12-06 19:55:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 829. [2021-12-06 19:55:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.18863361547763) internal successors, (983), 828 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:55:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 983 transitions. [2021-12-06 19:55:29,795 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 983 transitions. Word has length 75 [2021-12-06 19:55:29,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:55:29,795 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 983 transitions. [2021-12-06 19:55:29,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:55:29,795 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 983 transitions. [2021-12-06 19:55:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 19:55:29,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:55:29,797 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:55:29,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-12-06 19:55:29,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:55:29,997 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:55:29,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:55:29,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2087612318, now seen corresponding path program 8 times [2021-12-06 19:55:30,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:55:30,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842730898] [2021-12-06 19:55:30,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:55:30,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:55:30,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:55:30,003 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:55:30,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-06 19:55:30,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:55:30,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:55:30,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 19:55:30,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:55:30,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:55:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 74 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 19:55:32,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:55:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:55:44,051 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:55:44,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842730898] [2021-12-06 19:55:44,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842730898] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:55:44,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:55:44,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 33 [2021-12-06 19:55:44,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342471399] [2021-12-06 19:55:44,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:55:44,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:55:44,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:55:44,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:55:44,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:55:44,053 INFO L87 Difference]: Start difference. First operand 829 states and 983 transitions. Second operand has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:56:21,177 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:56:24,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:56:26,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:56:40,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:57:38,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:38,493 INFO L93 Difference]: Finished difference Result 2075 states and 2420 transitions. [2021-12-06 19:57:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-06 19:57:38,495 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 19:57:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:38,502 INFO L225 Difference]: With dead ends: 2075 [2021-12-06 19:57:38,503 INFO L226 Difference]: Without dead ends: 2063 [2021-12-06 19:57:38,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4058 ImplicationChecksByTransitivity, 73.1s TimeCoverageRelationStatistics Valid=1482, Invalid=12560, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 19:57:38,507 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1882 mSDsluCounter, 3472 mSDsCounter, 0 mSdLazyCounter, 3686 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1882 SdHoareTripleChecker+Valid, 3707 SdHoareTripleChecker+Invalid, 4318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 3686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 48.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:38,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1882 Valid, 3707 Invalid, 4318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 3686 Invalid, 0 Unknown, 517 Unchecked, 48.8s Time] [2021-12-06 19:57:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-12-06 19:57:38,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 956. [2021-12-06 19:57:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 954 states have (on average 1.1823899371069182) internal successors, (1128), 955 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:38,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1128 transitions. [2021-12-06 19:57:38,522 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1128 transitions. Word has length 75 [2021-12-06 19:57:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:38,522 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 1128 transitions. [2021-12-06 19:57:38,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1128 transitions. [2021-12-06 19:57:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 19:57:38,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:38,523 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:38,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-12-06 19:57:38,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:57:38,724 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:57:38,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:38,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1358405827, now seen corresponding path program 5 times [2021-12-06 19:57:38,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:57:38,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730440584] [2021-12-06 19:57:38,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 19:57:38,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:57:38,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:57:38,730 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:57:38,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-06 19:57:38,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-06 19:57:38,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:57:38,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 19:57:38,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:39,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:57:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 37 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:41,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:51,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:57:51,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730440584] [2021-12-06 19:57:51,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730440584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:57:51,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:57:51,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-12-06 19:57:51,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947095964] [2021-12-06 19:57:51,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:51,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 19:57:51,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:57:51,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 19:57:51,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 19:57:51,704 INFO L87 Difference]: Start difference. First operand 956 states and 1128 transitions. Second operand has 33 states, 33 states have (on average 4.545454545454546) internal successors, (150), 33 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:58:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:08,091 INFO L93 Difference]: Finished difference Result 1135 states and 1324 transitions. [2021-12-06 19:58:08,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 19:58:08,093 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.545454545454546) internal successors, (150), 33 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-06 19:58:08,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:08,097 INFO L225 Difference]: With dead ends: 1135 [2021-12-06 19:58:08,097 INFO L226 Difference]: Without dead ends: 1134 [2021-12-06 19:58:08,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=553, Invalid=2869, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 19:58:08,098 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 160 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:08,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 601 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 632 Invalid, 0 Unknown, 181 Unchecked, 6.0s Time] [2021-12-06 19:58:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-12-06 19:58:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1082. [2021-12-06 19:58:08,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1080 states have (on average 1.1777777777777778) internal successors, (1272), 1081 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:58:08,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1272 transitions. [2021-12-06 19:58:08,115 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1272 transitions. Word has length 76 [2021-12-06 19:58:08,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:08,115 INFO L470 AbstractCegarLoop]: Abstraction has 1082 states and 1272 transitions. [2021-12-06 19:58:08,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.545454545454546) internal successors, (150), 33 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:58:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1272 transitions. [2021-12-06 19:58:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 19:58:08,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:08,117 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:08,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-12-06 19:58:08,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:58:08,318 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-06 19:58:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:08,319 INFO L85 PathProgramCache]: Analyzing trace with hash -187523721, now seen corresponding path program 9 times [2021-12-06 19:58:08,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:58:08,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277736968] [2021-12-06 19:58:08,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:58:08,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:58:08,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:58:08,323 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:58:08,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3bac17-a250-45c1-91c7-df1935e24440/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-06 19:58:08,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 19:58:08,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:58:08,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 19:58:08,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:08,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:58:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 103 proven. 73 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:58:14,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:59:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:59:16,086 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:59:16,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277736968] [2021-12-06 19:59:16,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277736968] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:59:16,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:59:16,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-12-06 19:59:16,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010252267] [2021-12-06 19:59:16,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:59:16,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 19:59:16,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:59:16,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 19:59:16,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1098, Unknown=6, NotChecked=0, Total=1260 [2021-12-06 19:59:16,088 INFO L87 Difference]: Start difference. First operand 1082 states and 1272 transitions. Second operand has 36 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 36 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)