./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G --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 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:54:25,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:54:25,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:54:25,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:54:25,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:54:25,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:54:25,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:54:25,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:54:25,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:54:25,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:54:25,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:54:25,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:54:25,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:54:25,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:54:25,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:54:25,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:54:25,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:54:25,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:54:25,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:54:25,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:54:25,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:54:25,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:54:25,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:54:25,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:54:25,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:54:25,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:54:25,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:54:25,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:54:25,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:54:25,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:54:25,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:54:25,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:54:25,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:54:25,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:54:25,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:54:25,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:54:25,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:54:25,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:54:25,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:54:25,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:54:25,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:54:25,826 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 12:54:25,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:54:25,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:54:25,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:54:25,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:54:25,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:54:25,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:54:25,872 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:54:25,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:54:25,872 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:54:25,873 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 12:54:25,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:54:25,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:54:25,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:54:25,875 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 12:54:25,875 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 12:54:25,875 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 12:54:25,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:54:25,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 12:54:25,876 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:54:25,876 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:54:25,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:54:25,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:54:25,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:54:25,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:54:25,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:54:25,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:54:25,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:54:25,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:54:25,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:54:25,879 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_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 [2021-11-23 12:54:26,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:54:26,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:54:26,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:54:26,155 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:54:26,156 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:54:26,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2021-11-23 12:54:26,227 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/data/667bfb9db/4dc35b10d0414ad485233b91f951c86d/FLAG1ef3cee75 [2021-11-23 12:54:26,798 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:54:26,799 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2021-11-23 12:54:26,833 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/data/667bfb9db/4dc35b10d0414ad485233b91f951c86d/FLAG1ef3cee75 [2021-11-23 12:54:27,105 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/data/667bfb9db/4dc35b10d0414ad485233b91f951c86d [2021-11-23 12:54:27,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:54:27,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:54:27,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:54:27,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:54:27,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:54:27,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:54:27" (1/1) ... [2021-11-23 12:54:27,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f327f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:27, skipping insertion in model container [2021-11-23 12:54:27,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:54:27" (1/1) ... [2021-11-23 12:54:27,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:54:27,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:54:27,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:54:27,740 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-23 12:54:27,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@662d3772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:27, skipping insertion in model container [2021-11-23 12:54:27,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:54:27,742 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-23 12:54:27,745 INFO L158 Benchmark]: Toolchain (without parser) took 633.74ms. Allocated memory is still 109.1MB. Free memory was 74.6MB in the beginning and 79.3MB in the end (delta: -4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 12:54:27,746 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 109.1MB. Free memory was 62.2MB in the beginning and 62.1MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:54:27,748 INFO L158 Benchmark]: CACSL2BoogieTranslator took 631.24ms. Allocated memory is still 109.1MB. Free memory was 74.6MB in the beginning and 79.3MB in the end (delta: -4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 12:54:27,750 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 109.1MB. Free memory was 62.2MB in the beginning and 62.1MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 631.24ms. Allocated memory is still 109.1MB. Free memory was 74.6MB in the beginning and 79.3MB in the end (delta: -4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G --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 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:54:30,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:54:30,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:54:30,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:54:30,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:54:30,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:54:30,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:54:30,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:54:30,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:54:30,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:54:30,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:54:30,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:54:30,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:54:30,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:54:30,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:54:30,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:54:30,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:54:30,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:54:30,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:54:30,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:54:30,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:54:30,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:54:30,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:54:30,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:54:30,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:54:30,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:54:30,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:54:30,191 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:54:30,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:54:30,193 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:54:30,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:54:30,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:54:30,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:54:30,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:54:30,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:54:30,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:54:30,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:54:30,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:54:30,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:54:30,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:54:30,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:54:30,204 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-23 12:54:30,247 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:54:30,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:54:30,248 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:54:30,248 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:54:30,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:54:30,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:54:30,251 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:54:30,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:54:30,252 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:54:30,253 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 12:54:30,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:54:30,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:54:30,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:54:30,254 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 12:54:30,255 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 12:54:30,255 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 12:54:30,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:54:30,256 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 12:54:30,256 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 12:54:30,256 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 12:54:30,256 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:54:30,256 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:54:30,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:54:30,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:54:30,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:54:30,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:54:30,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:54:30,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:54:30,258 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-23 12:54:30,259 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 12:54:30,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:54:30,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 12:54:30,259 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_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 [2021-11-23 12:54:30,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:54:30,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:54:30,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:54:30,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:54:30,730 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:54:30,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2021-11-23 12:54:30,828 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/data/ff7b94c96/35a218ec7f764b3b8ab592c448bab6a4/FLAG5d7bf6876 [2021-11-23 12:54:31,465 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:54:31,466 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2021-11-23 12:54:31,484 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/data/ff7b94c96/35a218ec7f764b3b8ab592c448bab6a4/FLAG5d7bf6876 [2021-11-23 12:54:31,765 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/data/ff7b94c96/35a218ec7f764b3b8ab592c448bab6a4 [2021-11-23 12:54:31,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:54:31,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:54:31,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:54:31,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:54:31,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:54:31,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:54:31" (1/1) ... [2021-11-23 12:54:31,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28ae22cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:31, skipping insertion in model container [2021-11-23 12:54:31,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:54:31" (1/1) ... [2021-11-23 12:54:31,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:54:31,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:54:32,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:54:32,355 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 12:54:32,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:54:32,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:54:32,490 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:54:32,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:54:32,638 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:54:32,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:32 WrapperNode [2021-11-23 12:54:32,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:54:32,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:54:32,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:54:32,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:54:32,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:32" (1/1) ... [2021-11-23 12:54:32,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:32" (1/1) ... [2021-11-23 12:54:32,700 INFO L137 Inliner]: procedures = 171, calls = 87, calls flagged for inlining = 36, calls inlined = 11, statements flattened = 111 [2021-11-23 12:54:32,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:54:32,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:54:32,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:54:32,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:54:32,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:32" (1/1) ... [2021-11-23 12:54:32,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:32" (1/1) ... [2021-11-23 12:54:32,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:32" (1/1) ... [2021-11-23 12:54:32,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:32" (1/1) ... [2021-11-23 12:54:32,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:32" (1/1) ... [2021-11-23 12:54:32,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:32" (1/1) ... [2021-11-23 12:54:32,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:32" (1/1) ... [2021-11-23 12:54:32,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:54:32,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:54:32,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:54:32,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:54:32,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:32" (1/1) ... [2021-11-23 12:54:32,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:54:32,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:54:32,767 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:54:32,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:54:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 12:54:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:54:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:54:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 12:54:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 12:54:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:54:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 12:54:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:54:32,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:54:32,934 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:54:32,936 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:54:33,362 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:54:33,370 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:54:33,370 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 12:54:33,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:54:33 BoogieIcfgContainer [2021-11-23 12:54:33,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:54:33,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:54:33,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:54:33,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:54:33,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:54:31" (1/3) ... [2021-11-23 12:54:33,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bdb8685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:54:33, skipping insertion in model container [2021-11-23 12:54:33,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:54:32" (2/3) ... [2021-11-23 12:54:33,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bdb8685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:54:33, skipping insertion in model container [2021-11-23 12:54:33,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:54:33" (3/3) ... [2021-11-23 12:54:33,381 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test19-1.i [2021-11-23 12:54:33,386 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:54:33,387 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2021-11-23 12:54:33,447 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:54:33,456 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:54:33,456 INFO L340 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2021-11-23 12:54:33,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 45 states have (on average 1.8) internal successors, (81), 74 states have internal predecessors, (81), 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) [2021-11-23 12:54:33,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 12:54:33,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:33,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 12:54:33,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:33,500 INFO L85 PathProgramCache]: Analyzing trace with hash 28693828, now seen corresponding path program 1 times [2021-11-23 12:54:33,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:33,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981000515] [2021-11-23 12:54:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:33,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:33,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:33,520 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:33,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 12:54:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:33,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:54:33,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:33,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:54:33,796 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 12:54:33,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-11-23 12:54:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:33,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:33,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:33,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981000515] [2021-11-23 12:54:33,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981000515] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:33,895 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:33,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 12:54:33,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272753747] [2021-11-23 12:54:33,899 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:33,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:54:33,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:33,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:54:33,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:54:33,943 INFO L87 Difference]: Start difference. First operand has 75 states, 45 states have (on average 1.8) internal successors, (81), 74 states have internal predecessors, (81), 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 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:34,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:34,100 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-11-23 12:54:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:54:34,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 12:54:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:34,111 INFO L225 Difference]: With dead ends: 88 [2021-11-23 12:54:34,111 INFO L226 Difference]: Without dead ends: 86 [2021-11-23 12:54:34,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:54:34,116 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 53 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:34,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 73 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:54:34,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-23 12:54:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2021-11-23 12:54:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 71 states have internal predecessors, (79), 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) [2021-11-23 12:54:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2021-11-23 12:54:34,160 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 5 [2021-11-23 12:54:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:34,161 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2021-11-23 12:54:34,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:54:34,162 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2021-11-23 12:54:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 12:54:34,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:34,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 12:54:34,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:34,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:34,374 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:34,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:34,375 INFO L85 PathProgramCache]: Analyzing trace with hash 28693829, now seen corresponding path program 1 times [2021-11-23 12:54:34,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:34,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111053853] [2021-11-23 12:54:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:34,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:34,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:34,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:34,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 12:54:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:34,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 12:54:34,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:34,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:54:34,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:54:34,524 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:54:34,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 12:54:34,536 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 12:54:34,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 12:54:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:34,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:36,850 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:36,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111053853] [2021-11-23 12:54:36,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111053853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:36,851 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:36,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 12:54:36,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677472560] [2021-11-23 12:54:36,851 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:36,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:54:36,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:36,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:54:36,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-23 12:54:36,854 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 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) [2021-11-23 12:54:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:37,065 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-11-23 12:54:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:54:37,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 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 5 [2021-11-23 12:54:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:37,068 INFO L225 Difference]: With dead ends: 84 [2021-11-23 12:54:37,068 INFO L226 Difference]: Without dead ends: 84 [2021-11-23 12:54:37,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-23 12:54:37,070 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 180 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:37,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 63 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 47 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2021-11-23 12:54:37,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-23 12:54:37,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2021-11-23 12:54:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 68 states have internal predecessors, (75), 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) [2021-11-23 12:54:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-11-23 12:54:37,089 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 5 [2021-11-23 12:54:37,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:37,090 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-11-23 12:54:37,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 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) [2021-11-23 12:54:37,090 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-11-23 12:54:37,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:54:37,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:37,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:37,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:37,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:37,302 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:37,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:37,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1534998135, now seen corresponding path program 1 times [2021-11-23 12:54:37,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:37,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045423950] [2021-11-23 12:54:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:37,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:37,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:37,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:37,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 12:54:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:37,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:54:37,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:37,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:54:37,520 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 12:54:37,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2021-11-23 12:54:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:37,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:37,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:37,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045423950] [2021-11-23 12:54:37,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045423950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:37,640 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:37,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 4 [2021-11-23 12:54:37,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787457735] [2021-11-23 12:54:37,640 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:37,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:54:37,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:37,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:54:37,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:54:37,642 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-23 12:54:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:37,842 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2021-11-23 12:54:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:54:37,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 11 [2021-11-23 12:54:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:37,844 INFO L225 Difference]: With dead ends: 98 [2021-11-23 12:54:37,844 INFO L226 Difference]: Without dead ends: 98 [2021-11-23 12:54:37,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:54:37,846 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 94 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:37,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 111 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2021-11-23 12:54:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-23 12:54:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 67. [2021-11-23 12:54:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 66 states have internal predecessors, (73), 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) [2021-11-23 12:54:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-11-23 12:54:37,857 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 11 [2021-11-23 12:54:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:37,858 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-11-23 12:54:37,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-23 12:54:37,858 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-11-23 12:54:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:54:37,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:37,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:37,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:38,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:38,060 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:38,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:38,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1534998134, now seen corresponding path program 1 times [2021-11-23 12:54:38,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:38,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161346310] [2021-11-23 12:54:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:38,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:38,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:38,062 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:38,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 12:54:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:38,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 12:54:38,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:38,322 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:54:38,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2021-11-23 12:54:38,354 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 12:54:38,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 12:54:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:38,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:38,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-11-23 12:54:39,024 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 12:54:39,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2021-11-23 12:54:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:39,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:39,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161346310] [2021-11-23 12:54:39,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161346310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:39,219 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:39,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-23 12:54:39,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811075016] [2021-11-23 12:54:39,220 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:39,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 12:54:39,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:39,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 12:54:39,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:54:39,222 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 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) [2021-11-23 12:54:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:39,594 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2021-11-23 12:54:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:54:39,595 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 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 11 [2021-11-23 12:54:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:39,596 INFO L225 Difference]: With dead ends: 111 [2021-11-23 12:54:39,596 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 12:54:39,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:54:39,597 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 322 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:39,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 177 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 82 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2021-11-23 12:54:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 12:54:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 65. [2021-11-23 12:54:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 64 states have internal predecessors, (71), 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) [2021-11-23 12:54:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-11-23 12:54:39,605 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 11 [2021-11-23 12:54:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:39,605 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-11-23 12:54:39,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 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) [2021-11-23 12:54:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-11-23 12:54:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 12:54:39,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:39,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:39,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:39,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:39,807 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:39,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:39,807 INFO L85 PathProgramCache]: Analyzing trace with hash -340457773, now seen corresponding path program 1 times [2021-11-23 12:54:39,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:39,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163743972] [2021-11-23 12:54:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:39,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:39,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:39,809 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:39,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 12:54:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:39,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:54:39,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:39,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 12:54:39,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-23 12:54:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:39,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:39,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:39,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:39,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163743972] [2021-11-23 12:54:39,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163743972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:39,985 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:39,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-23 12:54:39,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307846264] [2021-11-23 12:54:39,986 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:39,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:54:39,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:39,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:54:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:54:39,987 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-11-23 12:54:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:40,194 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2021-11-23 12:54:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:54:40,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 [2021-11-23 12:54:40,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:40,197 INFO L225 Difference]: With dead ends: 131 [2021-11-23 12:54:40,197 INFO L226 Difference]: Without dead ends: 131 [2021-11-23 12:54:40,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:54:40,198 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 69 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:40,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 410 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:54:40,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-23 12:54:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 70. [2021-11-23 12:54:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.52) internal successors, (76), 69 states have internal predecessors, (76), 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) [2021-11-23 12:54:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-11-23 12:54:40,205 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 12 [2021-11-23 12:54:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:40,206 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-11-23 12:54:40,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-11-23 12:54:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-11-23 12:54:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 12:54:40,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:40,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:40,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:40,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:40,416 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:40,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:40,417 INFO L85 PathProgramCache]: Analyzing trace with hash -733484783, now seen corresponding path program 1 times [2021-11-23 12:54:40,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:40,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938154036] [2021-11-23 12:54:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:40,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:40,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:40,419 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:40,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 12:54:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:40,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 12:54:40,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:40,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:40,597 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:40,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938154036] [2021-11-23 12:54:40,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938154036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:40,598 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:40,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-23 12:54:40,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815615961] [2021-11-23 12:54:40,598 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:40,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:54:40,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:40,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:54:40,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:54:40,600 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) [2021-11-23 12:54:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:40,696 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-11-23 12:54:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 12:54:40,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 12 [2021-11-23 12:54:40,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:40,698 INFO L225 Difference]: With dead ends: 87 [2021-11-23 12:54:40,698 INFO L226 Difference]: Without dead ends: 87 [2021-11-23 12:54:40,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:54:40,699 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 62 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:40,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 353 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:54:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-23 12:54:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2021-11-23 12:54:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.5) internal successors, (78), 71 states have internal predecessors, (78), 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) [2021-11-23 12:54:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2021-11-23 12:54:40,713 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 12 [2021-11-23 12:54:40,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:40,714 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2021-11-23 12:54:40,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) [2021-11-23 12:54:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2021-11-23 12:54:40,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 12:54:40,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:40,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:40,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:40,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:40,917 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:40,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:40,917 INFO L85 PathProgramCache]: Analyzing trace with hash -503498285, now seen corresponding path program 1 times [2021-11-23 12:54:40,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:40,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20633720] [2021-11-23 12:54:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:40,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:40,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:40,919 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:40,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 12:54:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:40,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:54:40,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:41,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:41,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:41,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20633720] [2021-11-23 12:54:41,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20633720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:41,215 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:41,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 12:54:41,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929469093] [2021-11-23 12:54:41,216 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:41,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:54:41,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:41,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:54:41,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:54:41,217 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 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) [2021-11-23 12:54:41,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:41,415 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2021-11-23 12:54:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:54:41,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 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 14 [2021-11-23 12:54:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:41,417 INFO L225 Difference]: With dead ends: 116 [2021-11-23 12:54:41,417 INFO L226 Difference]: Without dead ends: 110 [2021-11-23 12:54:41,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:54:41,418 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 76 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:41,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 211 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:54:41,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-23 12:54:41,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 84. [2021-11-23 12:54:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.453125) internal successors, (93), 83 states have internal predecessors, (93), 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) [2021-11-23 12:54:41,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2021-11-23 12:54:41,426 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 14 [2021-11-23 12:54:41,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:41,426 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2021-11-23 12:54:41,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 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) [2021-11-23 12:54:41,427 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2021-11-23 12:54:41,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 12:54:41,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:41,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:41,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:41,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:41,640 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:41,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1266452579, now seen corresponding path program 1 times [2021-11-23 12:54:41,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:41,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222485515] [2021-11-23 12:54:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:41,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:41,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:41,643 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:41,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 12:54:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:41,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:54:41,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:41,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:41,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:41,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222485515] [2021-11-23 12:54:41,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222485515] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:41,807 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:41,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 12:54:41,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987303980] [2021-11-23 12:54:41,808 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:41,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:54:41,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:41,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:54:41,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:54:41,809 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-11-23 12:54:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:41,843 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2021-11-23 12:54:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:54:41,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 18 [2021-11-23 12:54:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:41,845 INFO L225 Difference]: With dead ends: 150 [2021-11-23 12:54:41,846 INFO L226 Difference]: Without dead ends: 150 [2021-11-23 12:54:41,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:54:41,847 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 113 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:41,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 192 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:54:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-23 12:54:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2021-11-23 12:54:41,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 87 states have internal predecessors, (97), 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) [2021-11-23 12:54:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2021-11-23 12:54:41,855 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 18 [2021-11-23 12:54:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:41,856 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2021-11-23 12:54:41,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-11-23 12:54:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2021-11-23 12:54:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 12:54:41,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:41,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:41,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:42,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:42,076 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:42,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1268299621, now seen corresponding path program 1 times [2021-11-23 12:54:42,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:42,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453582528] [2021-11-23 12:54:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:42,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:42,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:42,077 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:42,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 12:54:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:42,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:54:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:42,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 12:54:42,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-23 12:54:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:42,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:42,279 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:42,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453582528] [2021-11-23 12:54:42,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453582528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:42,280 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:42,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-23 12:54:42,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806491221] [2021-11-23 12:54:42,280 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:42,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:54:42,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:42,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:54:42,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:54:42,282 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-11-23 12:54:42,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:42,441 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2021-11-23 12:54:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:54:42,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 18 [2021-11-23 12:54:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:42,443 INFO L225 Difference]: With dead ends: 145 [2021-11-23 12:54:42,443 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 12:54:42,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:54:42,444 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 112 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:42,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 318 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:54:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 12:54:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2021-11-23 12:54:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.3972602739726028) internal successors, (102), 92 states have internal predecessors, (102), 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) [2021-11-23 12:54:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-11-23 12:54:42,450 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 18 [2021-11-23 12:54:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:42,451 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-11-23 12:54:42,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-11-23 12:54:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-11-23 12:54:42,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 12:54:42,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:42,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:42,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:42,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:42,663 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:42,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:42,663 INFO L85 PathProgramCache]: Analyzing trace with hash 875272611, now seen corresponding path program 1 times [2021-11-23 12:54:42,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:42,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539713139] [2021-11-23 12:54:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:42,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:42,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:42,665 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:42,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 12:54:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:42,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 12:54:42,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:42,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:54:42,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:54:42,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 12:54:43,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:54:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:43,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:43,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:43,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539713139] [2021-11-23 12:54:43,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539713139] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:43,189 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:43,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-11-23 12:54:43,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949766009] [2021-11-23 12:54:43,189 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:43,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 12:54:43,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:43,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 12:54:43,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:54:43,191 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 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) [2021-11-23 12:54:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:43,400 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-11-23 12:54:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 12:54:43,401 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 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 [2021-11-23 12:54:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:43,402 INFO L225 Difference]: With dead ends: 92 [2021-11-23 12:54:43,402 INFO L226 Difference]: Without dead ends: 92 [2021-11-23 12:54:43,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-11-23 12:54:43,403 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 298 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:43,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 207 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 54 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2021-11-23 12:54:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-23 12:54:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-23 12:54:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 73 states have (on average 1.3835616438356164) internal successors, (101), 91 states have internal predecessors, (101), 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) [2021-11-23 12:54:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-11-23 12:54:43,408 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 18 [2021-11-23 12:54:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:43,409 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-11-23 12:54:43,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 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) [2021-11-23 12:54:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-11-23 12:54:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 12:54:43,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:43,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:54:43,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:43,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:43,624 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1363647270, now seen corresponding path program 1 times [2021-11-23 12:54:43,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:43,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736557136] [2021-11-23 12:54:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:43,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:43,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:43,627 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:43,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 12:54:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:43,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 12:54:43,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:43,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:54:44,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:54:44,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2021-11-23 12:54:44,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 12:54:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:44,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:44,967 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736557136] [2021-11-23 12:54:44,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736557136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:44,967 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:44,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 13 [2021-11-23 12:54:44,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867305219] [2021-11-23 12:54:44,968 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:44,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 12:54:44,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:44,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 12:54:44,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:54:44,969 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 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) [2021-11-23 12:54:46,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:46,162 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2021-11-23 12:54:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 12:54:46,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 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 [2021-11-23 12:54:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:46,165 INFO L225 Difference]: With dead ends: 197 [2021-11-23 12:54:46,165 INFO L226 Difference]: Without dead ends: 197 [2021-11-23 12:54:46,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2021-11-23 12:54:46,167 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 346 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:46,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 408 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 215 Invalid, 0 Unknown, 36 Unchecked, 0.5s Time] [2021-11-23 12:54:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-23 12:54:46,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 91. [2021-11-23 12:54:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 73 states have (on average 1.36986301369863) internal successors, (100), 90 states have internal predecessors, (100), 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) [2021-11-23 12:54:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-11-23 12:54:46,173 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 19 [2021-11-23 12:54:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:46,174 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-11-23 12:54:46,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 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) [2021-11-23 12:54:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-11-23 12:54:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 12:54:46,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:46,176 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] [2021-11-23 12:54:46,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:46,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:46,389 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:46,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:46,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1586417447, now seen corresponding path program 1 times [2021-11-23 12:54:46,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:46,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994811453] [2021-11-23 12:54:46,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:46,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:46,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:46,391 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:46,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 12:54:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:46,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:54:46,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:46,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:46,579 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 12:54:46,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2021-11-23 12:54:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:46,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:46,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994811453] [2021-11-23 12:54:46,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994811453] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:46,603 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:46,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 12:54:46,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315412900] [2021-11-23 12:54:46,603 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:46,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:54:46,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:46,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:54:46,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:54:46,605 INFO L87 Difference]: Start difference. First operand 91 states and 100 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) [2021-11-23 12:54:46,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:46,750 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2021-11-23 12:54:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:54:46,751 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 [2021-11-23 12:54:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:46,752 INFO L225 Difference]: With dead ends: 91 [2021-11-23 12:54:46,752 INFO L226 Difference]: Without dead ends: 91 [2021-11-23 12:54:46,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:54:46,753 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 100 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:46,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 88 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:54:46,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-23 12:54:46,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-11-23 12:54:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 73 states have (on average 1.356164383561644) internal successors, (99), 89 states have internal predecessors, (99), 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) [2021-11-23 12:54:46,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-11-23 12:54:46,758 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 20 [2021-11-23 12:54:46,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:46,758 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-11-23 12:54:46,758 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) [2021-11-23 12:54:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-11-23 12:54:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 12:54:46,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:46,760 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] [2021-11-23 12:54:46,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 12:54:46,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:46,968 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1586417448, now seen corresponding path program 1 times [2021-11-23 12:54:46,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:46,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720513122] [2021-11-23 12:54:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:46,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:46,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:46,970 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:46,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 12:54:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:47,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 12:54:47,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:47,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:47,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:54:47,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-23 12:54:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:47,716 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:47,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720513122] [2021-11-23 12:54:47,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720513122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:47,716 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:47,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-23 12:54:47,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201497403] [2021-11-23 12:54:47,717 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:47,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 12:54:47,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 12:54:47,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:54:47,718 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 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) [2021-11-23 12:54:47,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:47,968 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2021-11-23 12:54:47,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:54:47,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 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 [2021-11-23 12:54:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:47,969 INFO L225 Difference]: With dead ends: 104 [2021-11-23 12:54:47,970 INFO L226 Difference]: Without dead ends: 104 [2021-11-23 12:54:47,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:54:47,970 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 210 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:47,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 119 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:54:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-23 12:54:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2021-11-23 12:54:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 73 states have (on average 1.3424657534246576) internal successors, (98), 88 states have internal predecessors, (98), 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) [2021-11-23 12:54:47,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2021-11-23 12:54:47,975 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 20 [2021-11-23 12:54:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:47,975 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2021-11-23 12:54:47,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 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) [2021-11-23 12:54:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2021-11-23 12:54:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 12:54:47,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:47,977 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] [2021-11-23 12:54:47,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:48,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:48,184 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:48,185 INFO L85 PathProgramCache]: Analyzing trace with hash -676607483, now seen corresponding path program 1 times [2021-11-23 12:54:48,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:48,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251865610] [2021-11-23 12:54:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:48,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:48,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:48,186 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:48,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 12:54:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:48,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 12:54:48,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:48,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:54:48,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 12:54:48,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:54:48,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 12:54:48,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-11-23 12:54:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:48,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:54,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:54,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251865610] [2021-11-23 12:54:54,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251865610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:54,950 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:54,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-11-23 12:54:54,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896122363] [2021-11-23 12:54:54,950 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:54,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 12:54:54,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:54,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 12:54:54,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=100, Unknown=1, NotChecked=0, Total=132 [2021-11-23 12:54:54,951 INFO L87 Difference]: Start difference. First operand 89 states and 98 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) [2021-11-23 12:54:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:55,552 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2021-11-23 12:54:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 12:54:55,553 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 20 [2021-11-23 12:54:55,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:55,553 INFO L225 Difference]: With dead ends: 137 [2021-11-23 12:54:55,553 INFO L226 Difference]: Without dead ends: 137 [2021-11-23 12:54:55,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=62, Invalid=177, Unknown=1, NotChecked=0, Total=240 [2021-11-23 12:54:55,554 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 164 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:55,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 337 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 211 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2021-11-23 12:54:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-23 12:54:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 93. [2021-11-23 12:54:55,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 77 states have (on average 1.3246753246753247) internal successors, (102), 92 states have internal predecessors, (102), 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) [2021-11-23 12:54:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-11-23 12:54:55,559 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 20 [2021-11-23 12:54:55,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:55,559 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-11-23 12:54:55,559 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) [2021-11-23 12:54:55,560 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-11-23 12:54:55,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 12:54:55,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:55,561 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] [2021-11-23 12:54:55,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:55,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:55,773 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:55,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1624215107, now seen corresponding path program 1 times [2021-11-23 12:54:55,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:55,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735166931] [2021-11-23 12:54:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:55,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:55,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:55,775 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:55,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 12:54:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:55,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 12:54:55,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:55,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:54:55,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:54:55,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-23 12:54:55,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-23 12:54:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:56,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:56,130 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:56,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735166931] [2021-11-23 12:54:56,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735166931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:56,130 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:56,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-23 12:54:56,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835035492] [2021-11-23 12:54:56,131 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:56,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:54:56,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:54:56,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:54:56,132 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2021-11-23 12:54:56,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:56,381 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2021-11-23 12:54:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:54:56,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 [2021-11-23 12:54:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:56,383 INFO L225 Difference]: With dead ends: 126 [2021-11-23 12:54:56,383 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 12:54:56,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:54:56,384 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 60 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:56,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 474 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:54:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 12:54:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 73. [2021-11-23 12:54:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 72 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) [2021-11-23 12:54:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-11-23 12:54:56,389 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2021-11-23 12:54:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:56,389 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-11-23 12:54:56,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2021-11-23 12:54:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-11-23 12:54:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 12:54:56,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:56,390 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] [2021-11-23 12:54:56,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:56,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:56,591 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:56,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:56,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1934300630, now seen corresponding path program 1 times [2021-11-23 12:54:56,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:56,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016019257] [2021-11-23 12:54:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:56,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:56,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:56,599 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:56,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 12:54:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:56,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 12:54:56,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:56,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 12:54:56,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:54:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:56,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:56,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-23 12:54:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:56,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:56,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016019257] [2021-11-23 12:54:56,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016019257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:56,990 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:56,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-23 12:54:56,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965922485] [2021-11-23 12:54:56,990 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:56,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:54:56,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:56,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:54:56,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:54:56,991 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-11-23 12:54:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:57,395 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2021-11-23 12:54:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 12:54:57,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 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 21 [2021-11-23 12:54:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:57,397 INFO L225 Difference]: With dead ends: 79 [2021-11-23 12:54:57,397 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 12:54:57,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:54:57,398 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 125 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:57,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 222 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:54:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 12:54:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2021-11-23 12:54:57,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 71 states have internal predecessors, (76), 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) [2021-11-23 12:54:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-11-23 12:54:57,402 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 21 [2021-11-23 12:54:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:57,402 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-11-23 12:54:57,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-11-23 12:54:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-11-23 12:54:57,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 12:54:57,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:57,403 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] [2021-11-23 12:54:57,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:57,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:57,612 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:57,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1934385100, now seen corresponding path program 1 times [2021-11-23 12:54:57,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:57,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233525950] [2021-11-23 12:54:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:57,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:57,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:57,613 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:57,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 12:54:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:57,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 12:54:57,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:57,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:57,909 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 12:54:57,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2021-11-23 12:54:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:57,956 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:54:57,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233525950] [2021-11-23 12:54:57,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233525950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:54:57,956 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:54:57,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 12:54:57,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364270091] [2021-11-23 12:54:57,957 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:54:57,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:54:57,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:54:57,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:54:57,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:54:57,958 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-11-23 12:54:58,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:54:58,211 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-11-23 12:54:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:54:58,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 21 [2021-11-23 12:54:58,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:54:58,212 INFO L225 Difference]: With dead ends: 72 [2021-11-23 12:54:58,212 INFO L226 Difference]: Without dead ends: 72 [2021-11-23 12:54:58,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:54:58,213 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 136 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:54:58,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 91 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:54:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-23 12:54:58,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-23 12:54:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 70 states have internal predecessors, (75), 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) [2021-11-23 12:54:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-11-23 12:54:58,217 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 21 [2021-11-23 12:54:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:54:58,217 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-11-23 12:54:58,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-11-23 12:54:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-11-23 12:54:58,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 12:54:58,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:54:58,218 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] [2021-11-23 12:54:58,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 12:54:58,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:54:58,428 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:54:58,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:54:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1934385101, now seen corresponding path program 1 times [2021-11-23 12:54:58,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:54:58,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910692799] [2021-11-23 12:54:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:54:58,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:54:58,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:54:58,431 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:54:58,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 12:54:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:54:58,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 12:54:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:54:58,771 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:54:58,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 12:54:58,791 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 12:54:58,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 12:54:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:54:58,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:54:59,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:54:59,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 58 [2021-11-23 12:54:59,804 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 12:54:59,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 57 [2021-11-23 12:55:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:00,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:55:00,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910692799] [2021-11-23 12:55:00,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910692799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:00,159 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:00,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-23 12:55:00,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406721384] [2021-11-23 12:55:00,162 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:00,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 12:55:00,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:55:00,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 12:55:00,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:55:00,163 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 11 states have internal predecessors, (41), 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) [2021-11-23 12:55:00,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:00,661 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2021-11-23 12:55:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:55:00,663 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 11 states have internal predecessors, (41), 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 21 [2021-11-23 12:55:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:00,663 INFO L225 Difference]: With dead ends: 75 [2021-11-23 12:55:00,664 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 12:55:00,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-23 12:55:00,665 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 158 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:00,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 131 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 83 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2021-11-23 12:55:00,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 12:55:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-11-23 12:55:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 69 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) [2021-11-23 12:55:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-11-23 12:55:00,668 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 21 [2021-11-23 12:55:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:00,669 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-11-23 12:55:00,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 11 states have internal predecessors, (41), 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) [2021-11-23 12:55:00,669 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-11-23 12:55:00,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:55:00,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:00,670 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] [2021-11-23 12:55:00,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:00,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:55:00,882 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:55:00,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash -166222521, now seen corresponding path program 1 times [2021-11-23 12:55:00,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:55:00,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811193412] [2021-11-23 12:55:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:00,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:55:00,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:55:00,885 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:55:00,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 12:55:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:00,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 12:55:00,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:01,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 12:55:01,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:55:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:01,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:01,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-23 12:55:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:02,134 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:55:02,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811193412] [2021-11-23 12:55:02,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811193412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:02,134 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:02,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 15 [2021-11-23 12:55:02,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99387105] [2021-11-23 12:55:02,135 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:02,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 12:55:02,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:55:02,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 12:55:02,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-23 12:55:02,136 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 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) [2021-11-23 12:55:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:02,344 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2021-11-23 12:55:02,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:55:02,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 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 [2021-11-23 12:55:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:02,345 INFO L225 Difference]: With dead ends: 89 [2021-11-23 12:55:02,345 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 12:55:02,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-23 12:55:02,346 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 55 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:02,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 418 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2021-11-23 12:55:02,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 12:55:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-11-23 12:55:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 77 states have internal predecessors, (83), 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) [2021-11-23 12:55:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2021-11-23 12:55:02,351 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 22 [2021-11-23 12:55:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:02,351 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2021-11-23 12:55:02,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 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) [2021-11-23 12:55:02,352 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2021-11-23 12:55:02,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:55:02,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:02,353 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] [2021-11-23 12:55:02,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:02,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:55:02,562 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:55:02,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:02,563 INFO L85 PathProgramCache]: Analyzing trace with hash -163603987, now seen corresponding path program 1 times [2021-11-23 12:55:02,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:55:02,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996205198] [2021-11-23 12:55:02,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:02,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:55:02,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:55:02,564 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:55:02,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 12:55:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:02,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 12:55:02,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:02,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:55:03,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:55:03,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 12:55:03,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:55:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:03,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:03,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 194 [2021-11-23 12:55:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:03,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:55:03,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996205198] [2021-11-23 12:55:03,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996205198] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:03,918 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:03,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 16 [2021-11-23 12:55:03,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039752070] [2021-11-23 12:55:03,918 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:03,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 12:55:03,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:55:03,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 12:55:03,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-23 12:55:03,920 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 17 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) [2021-11-23 12:55:04,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:04,783 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-11-23 12:55:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:55:04,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 17 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) Word has length 22 [2021-11-23 12:55:04,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:04,785 INFO L225 Difference]: With dead ends: 81 [2021-11-23 12:55:04,785 INFO L226 Difference]: Without dead ends: 81 [2021-11-23 12:55:04,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-11-23 12:55:04,787 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 353 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:04,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 258 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2021-11-23 12:55:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-23 12:55:04,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2021-11-23 12:55:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 76 states have internal predecessors, (82), 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) [2021-11-23 12:55:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-11-23 12:55:04,789 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 22 [2021-11-23 12:55:04,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:04,789 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-11-23 12:55:04,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 17 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) [2021-11-23 12:55:04,790 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-11-23 12:55:04,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:55:04,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:04,790 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] [2021-11-23 12:55:04,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:04,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:55:04,991 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:55:04,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:04,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1177339771, now seen corresponding path program 1 times [2021-11-23 12:55:04,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:55:04,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838168816] [2021-11-23 12:55:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:04,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:55:04,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:55:04,993 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:55:05,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 12:55:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:05,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 12:55:05,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:05,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 12:55:05,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 12:55:05,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-23 12:55:05,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-23 12:55:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:05,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:05,333 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:55:05,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838168816] [2021-11-23 12:55:05,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838168816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:05,333 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:05,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-23 12:55:05,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624933955] [2021-11-23 12:55:05,334 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:05,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:55:05,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:55:05,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:55:05,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:55:05,335 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-23 12:55:05,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:05,559 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2021-11-23 12:55:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:55:05,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 [2021-11-23 12:55:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:05,561 INFO L225 Difference]: With dead ends: 110 [2021-11-23 12:55:05,561 INFO L226 Difference]: Without dead ends: 110 [2021-11-23 12:55:05,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:55:05,562 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 94 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:05,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 368 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:55:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-23 12:55:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 75. [2021-11-23 12:55:05,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.253968253968254) internal successors, (79), 74 states have internal predecessors, (79), 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) [2021-11-23 12:55:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-11-23 12:55:05,567 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 22 [2021-11-23 12:55:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:05,567 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-11-23 12:55:05,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-23 12:55:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-11-23 12:55:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:55:05,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:05,569 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] [2021-11-23 12:55:05,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:05,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:55:05,776 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:55:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:05,777 INFO L85 PathProgramCache]: Analyzing trace with hash -497281401, now seen corresponding path program 1 times [2021-11-23 12:55:05,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:55:05,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405594580] [2021-11-23 12:55:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:05,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:55:05,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:55:05,779 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:55:05,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 12:55:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:05,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:55:05,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:05,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:05,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:55:05,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405594580] [2021-11-23 12:55:05,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405594580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:05,976 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:05,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 12:55:05,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681638034] [2021-11-23 12:55:05,977 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:05,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:55:05,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:55:05,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:55:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:55:05,978 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-11-23 12:55:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:06,018 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-11-23 12:55:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:55:06,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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 [2021-11-23 12:55:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:06,023 INFO L225 Difference]: With dead ends: 79 [2021-11-23 12:55:06,023 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 12:55:06,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:55:06,024 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 91 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:06,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 164 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:55:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 12:55:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2021-11-23 12:55:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 67 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) [2021-11-23 12:55:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-11-23 12:55:06,029 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 22 [2021-11-23 12:55:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:06,029 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-11-23 12:55:06,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-11-23 12:55:06,030 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-11-23 12:55:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 12:55:06,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:06,031 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, 1] [2021-11-23 12:55:06,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:06,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:55:06,232 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:55:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash -857930760, now seen corresponding path program 1 times [2021-11-23 12:55:06,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:55:06,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087270891] [2021-11-23 12:55:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:06,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:55:06,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:55:06,234 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:55:06,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 12:55:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:06,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 12:55:06,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:06,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:55:06,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 12:55:06,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-11-23 12:55:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:06,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:06,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-23 12:55:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:07,086 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:55:07,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087270891] [2021-11-23 12:55:07,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087270891] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:07,087 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:07,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-23 12:55:07,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593188314] [2021-11-23 12:55:07,087 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:07,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 12:55:07,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:55:07,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 12:55:07,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:55:07,088 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 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) [2021-11-23 12:55:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:07,583 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-11-23 12:55:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 12:55:07,584 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 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 23 [2021-11-23 12:55:07,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:07,584 INFO L225 Difference]: With dead ends: 68 [2021-11-23 12:55:07,584 INFO L226 Difference]: Without dead ends: 68 [2021-11-23 12:55:07,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 17 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-23 12:55:07,586 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 94 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:07,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 224 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2021-11-23 12:55:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-23 12:55:07,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-23 12:55:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 66 states have internal predecessors, (69), 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) [2021-11-23 12:55:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-11-23 12:55:07,590 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 23 [2021-11-23 12:55:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:07,590 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-11-23 12:55:07,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 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) [2021-11-23 12:55:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-11-23 12:55:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 12:55:07,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:07,592 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, 1] [2021-11-23 12:55:07,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:07,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:55:07,800 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:55:07,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:07,800 INFO L85 PathProgramCache]: Analyzing trace with hash -776756180, now seen corresponding path program 1 times [2021-11-23 12:55:07,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:55:07,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390235412] [2021-11-23 12:55:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:07,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:55:07,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:55:07,802 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:55:07,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 12:55:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:07,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 12:55:07,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:08,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 12:55:08,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:55:08,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 12:55:08,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:55:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:08,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:10,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 194 [2021-11-23 12:55:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:10,855 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:55:10,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390235412] [2021-11-23 12:55:10,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390235412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:10,856 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:10,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 16 [2021-11-23 12:55:10,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548768146] [2021-11-23 12:55:10,856 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:10,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 12:55:10,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:55:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 12:55:10,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-23 12:55:10,858 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 17 states have internal predecessors, (43), 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) [2021-11-23 12:55:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:12,018 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-23 12:55:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:55:12,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 17 states have internal predecessors, (43), 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 23 [2021-11-23 12:55:12,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:12,020 INFO L225 Difference]: With dead ends: 70 [2021-11-23 12:55:12,020 INFO L226 Difference]: Without dead ends: 70 [2021-11-23 12:55:12,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-11-23 12:55:12,021 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 294 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:12,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 166 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 131 Invalid, 0 Unknown, 2 Unchecked, 0.5s Time] [2021-11-23 12:55:12,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-23 12:55:12,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-11-23 12:55:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 65 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) [2021-11-23 12:55:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-11-23 12:55:12,025 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 23 [2021-11-23 12:55:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:12,025 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-11-23 12:55:12,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 17 states have internal predecessors, (43), 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) [2021-11-23 12:55:12,026 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-11-23 12:55:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 12:55:12,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:12,027 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, 1] [2021-11-23 12:55:12,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-23 12:55:12,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:55:12,228 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:55:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:12,228 INFO L85 PathProgramCache]: Analyzing trace with hash -776016434, now seen corresponding path program 1 times [2021-11-23 12:55:12,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:55:12,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529380471] [2021-11-23 12:55:12,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:12,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:55:12,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:55:12,230 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:55:12,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 12:55:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:12,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:55:12,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:12,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:12,377 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:55:12,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529380471] [2021-11-23 12:55:12,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529380471] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:12,377 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:12,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 12:55:12,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455289219] [2021-11-23 12:55:12,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:12,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:55:12,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:55:12,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:55:12,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:55:12,379 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-11-23 12:55:12,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:12,413 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-11-23 12:55:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:55:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 23 [2021-11-23 12:55:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:12,414 INFO L225 Difference]: With dead ends: 70 [2021-11-23 12:55:12,414 INFO L226 Difference]: Without dead ends: 70 [2021-11-23 12:55:12,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:55:12,415 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 41 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:12,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 131 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:55:12,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-23 12:55:12,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-11-23 12:55:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 65 states have internal predecessors, (67), 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) [2021-11-23 12:55:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-11-23 12:55:12,418 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 23 [2021-11-23 12:55:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:12,419 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-11-23 12:55:12,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-11-23 12:55:12,419 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-11-23 12:55:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 12:55:12,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:12,419 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, 1, 1] [2021-11-23 12:55:12,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:12,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:55:12,621 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:55:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1690362319, now seen corresponding path program 1 times [2021-11-23 12:55:12,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:55:12,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287532437] [2021-11-23 12:55:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:12,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:55:12,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:55:12,623 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:55:12,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 12:55:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:12,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 12:55:12,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:12,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:55:12,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 12:55:13,084 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-11-23 12:55:13,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 43 [2021-11-23 12:55:13,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:55:13,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 12:55:13,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2021-11-23 12:55:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:13,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:25,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 356 treesize of output 344 [2021-11-23 12:55:43,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:55:43,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 143 [2021-11-23 12:55:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:44,259 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:55:44,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287532437] [2021-11-23 12:55:44,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287532437] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:44,259 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:44,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 19 [2021-11-23 12:55:44,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969978850] [2021-11-23 12:55:44,260 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:44,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 12:55:44,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:55:44,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 12:55:44,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=309, Unknown=11, NotChecked=0, Total=380 [2021-11-23 12:55:44,261 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 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) [2021-11-23 12:55:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:44,532 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2021-11-23 12:55:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:55:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 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) Word has length 24 [2021-11-23 12:55:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:44,533 INFO L225 Difference]: With dead ends: 65 [2021-11-23 12:55:44,533 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 12:55:44,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=90, Invalid=405, Unknown=11, NotChecked=0, Total=506 [2021-11-23 12:55:44,534 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 21 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:44,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 391 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2021-11-23 12:55:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 12:55:44,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-23 12:55:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 64 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) [2021-11-23 12:55:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-11-23 12:55:44,537 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 24 [2021-11-23 12:55:44,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:44,537 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-11-23 12:55:44,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 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) [2021-11-23 12:55:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-11-23 12:55:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 12:55:44,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:44,538 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, 1, 1, 1] [2021-11-23 12:55:44,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:44,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:55:44,739 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:55:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:44,739 INFO L85 PathProgramCache]: Analyzing trace with hash 162263580, now seen corresponding path program 1 times [2021-11-23 12:55:44,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:55:44,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135389658] [2021-11-23 12:55:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:44,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:55:44,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:55:44,741 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:55:44,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 12:55:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:44,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 12:55:44,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:44,949 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 12:55:44,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-11-23 12:55:45,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 12:55:45,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-23 12:55:45,435 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-23 12:55:45,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 43 [2021-11-23 12:55:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:45,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:51,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-11-23 12:56:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:01,710 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:56:01,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135389658] [2021-11-23 12:56:01,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135389658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:56:01,711 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:56:01,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 15 [2021-11-23 12:56:01,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716065738] [2021-11-23 12:56:01,711 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:56:01,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 12:56:01,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:56:01,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 12:56:01,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=184, Unknown=6, NotChecked=0, Total=240 [2021-11-23 12:56:01,712 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 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) [2021-11-23 12:56:06,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:06,509 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-11-23 12:56:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:56:06,510 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 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 25 [2021-11-23 12:56:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:06,510 INFO L225 Difference]: With dead ends: 68 [2021-11-23 12:56:06,510 INFO L226 Difference]: Without dead ends: 68 [2021-11-23 12:56:06,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=115, Invalid=341, Unknown=6, NotChecked=0, Total=462 [2021-11-23 12:56:06,511 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 87 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:06,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 229 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 188 Invalid, 0 Unknown, 23 Unchecked, 0.4s Time] [2021-11-23 12:56:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-23 12:56:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2021-11-23 12:56:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 63 states have internal predecessors, (65), 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) [2021-11-23 12:56:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-11-23 12:56:06,515 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 25 [2021-11-23 12:56:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:06,515 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-11-23 12:56:06,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 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) [2021-11-23 12:56:06,516 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-11-23 12:56:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 12:56:06,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:06,516 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, 1, 1, 1] [2021-11-23 12:56:06,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:06,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:56:06,727 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:56:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash 861624464, now seen corresponding path program 1 times [2021-11-23 12:56:06,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:56:06,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651222897] [2021-11-23 12:56:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:06,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:56:06,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:56:06,729 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:56:06,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 12:56:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:06,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 12:56:06,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:07,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:07,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:56:07,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-23 12:56:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:07,987 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:56:07,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651222897] [2021-11-23 12:56:07,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651222897] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:56:07,988 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:56:07,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-23 12:56:07,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367084555] [2021-11-23 12:56:07,988 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:56:07,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 12:56:07,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:56:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 12:56:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:56:07,990 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 12 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) [2021-11-23 12:56:08,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:08,554 INFO L93 Difference]: Finished difference Result 74 states and 73 transitions. [2021-11-23 12:56:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:56:08,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 12 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) Word has length 25 [2021-11-23 12:56:08,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:08,556 INFO L225 Difference]: With dead ends: 74 [2021-11-23 12:56:08,556 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 12:56:08,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-23 12:56:08,556 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 262 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:08,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 164 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:56:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 12:56:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2021-11-23 12:56:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 62 states have internal predecessors, (64), 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) [2021-11-23 12:56:08,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-11-23 12:56:08,559 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 25 [2021-11-23 12:56:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:08,559 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-11-23 12:56:08,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 12 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) [2021-11-23 12:56:08,560 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-11-23 12:56:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 12:56:08,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:08,560 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, 1, 1, 1] [2021-11-23 12:56:08,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-23 12:56:08,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:56:08,772 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:56:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:08,772 INFO L85 PathProgramCache]: Analyzing trace with hash 861624463, now seen corresponding path program 1 times [2021-11-23 12:56:08,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:56:08,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675082511] [2021-11-23 12:56:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:08,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:56:08,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:56:08,773 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:56:08,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 12:56:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:08,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 12:56:08,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:08,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:56:08,926 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 12:56:08,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 12:56:09,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 12:56:09,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:56:09,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:56:09,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-23 12:56:09,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-23 12:56:09,662 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 12:56:09,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2021-11-23 12:56:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:09,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:10,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:56:10,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 63 [2021-11-23 12:56:10,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:56:10,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 62 [2021-11-23 12:56:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:11,085 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:56:11,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675082511] [2021-11-23 12:56:11,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675082511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:56:11,085 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:56:11,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 22 [2021-11-23 12:56:11,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045685355] [2021-11-23 12:56:11,085 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:56:11,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 12:56:11,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:56:11,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 12:56:11,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-11-23 12:56:11,086 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 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) [2021-11-23 12:56:12,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:12,579 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-11-23 12:56:12,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 12:56:12,580 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 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) Word has length 25 [2021-11-23 12:56:12,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:12,581 INFO L225 Difference]: With dead ends: 67 [2021-11-23 12:56:12,581 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 12:56:12,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 12:56:12,582 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 204 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:12,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 334 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 197 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2021-11-23 12:56:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 12:56:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-11-23 12:56:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.105263157894737) internal successors, (63), 61 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) [2021-11-23 12:56:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-11-23 12:56:12,586 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 25 [2021-11-23 12:56:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:12,586 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-11-23 12:56:12,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 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) [2021-11-23 12:56:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-11-23 12:56:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 12:56:12,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:12,587 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, 1, 1, 1, 1] [2021-11-23 12:56:12,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:12,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:56:12,796 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:56:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:12,796 INFO L85 PathProgramCache]: Analyzing trace with hash 940554643, now seen corresponding path program 1 times [2021-11-23 12:56:12,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:56:12,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821241767] [2021-11-23 12:56:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:12,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:56:12,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:56:12,798 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:56:12,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 12:56:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:12,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 12:56:12,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:13,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 12:56:13,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:56:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:13,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:13,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-23 12:56:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:13,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:56:13,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821241767] [2021-11-23 12:56:13,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821241767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:56:13,298 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:56:13,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2021-11-23 12:56:13,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782990579] [2021-11-23 12:56:13,299 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:56:13,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 12:56:13,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:56:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 12:56:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:56:13,300 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 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) [2021-11-23 12:56:13,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:13,878 INFO L93 Difference]: Finished difference Result 72 states and 71 transitions. [2021-11-23 12:56:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 12:56:13,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 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 26 [2021-11-23 12:56:13,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:13,880 INFO L225 Difference]: With dead ends: 72 [2021-11-23 12:56:13,880 INFO L226 Difference]: Without dead ends: 72 [2021-11-23 12:56:13,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-11-23 12:56:13,881 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 194 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:13,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 198 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:56:13,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-23 12:56:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2021-11-23 12:56:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.087719298245614) internal successors, (62), 60 states have internal predecessors, (62), 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) [2021-11-23 12:56:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-11-23 12:56:13,884 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 26 [2021-11-23 12:56:13,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:13,885 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-11-23 12:56:13,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 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) [2021-11-23 12:56:13,885 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-11-23 12:56:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 12:56:13,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:13,886 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, 1, 1, 1, 1] [2021-11-23 12:56:13,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-23 12:56:14,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:56:14,096 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:56:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1626818196, now seen corresponding path program 1 times [2021-11-23 12:56:14,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:56:14,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474840795] [2021-11-23 12:56:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:14,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:56:14,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:56:14,098 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:56:14,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 12:56:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:14,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 12:56:14,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:14,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 12:56:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:56:14,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-23 12:56:14,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 12:56:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:16,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:29,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:56:29,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474840795] [2021-11-23 12:56:29,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474840795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:56:29,874 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:56:29,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 17 [2021-11-23 12:56:29,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201530001] [2021-11-23 12:56:29,874 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:56:29,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 12:56:29,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:56:29,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 12:56:29,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=256, Unknown=3, NotChecked=0, Total=306 [2021-11-23 12:56:29,875 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 18 states have internal predecessors, (51), 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) [2021-11-23 12:56:30,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:30,876 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-11-23 12:56:30,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:56:30,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 18 states have internal predecessors, (51), 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 26 [2021-11-23 12:56:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:30,877 INFO L225 Difference]: With dead ends: 67 [2021-11-23 12:56:30,878 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 12:56:30,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=83, Invalid=420, Unknown=3, NotChecked=0, Total=506 [2021-11-23 12:56:30,879 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:30,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 360 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 181 Invalid, 0 Unknown, 55 Unchecked, 0.5s Time] [2021-11-23 12:56:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 12:56:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-23 12:56:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 49 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) [2021-11-23 12:56:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-11-23 12:56:30,881 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 26 [2021-11-23 12:56:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:30,882 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-11-23 12:56:30,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 18 states have internal predecessors, (51), 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) [2021-11-23 12:56:30,882 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-11-23 12:56:30,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 12:56:30,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:30,883 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, 1, 1, 1, 1, 1] [2021-11-23 12:56:30,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:31,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:56:31,092 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:56:31,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:31,092 INFO L85 PathProgramCache]: Analyzing trace with hash -907577009, now seen corresponding path program 1 times [2021-11-23 12:56:31,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:56:31,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041919035] [2021-11-23 12:56:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:31,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:56:31,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:56:31,094 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:56:31,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 12:56:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:31,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 12:56:31,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:31,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 12:56:32,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:56:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:32,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:32,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-23 12:56:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:33,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:56:33,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041919035] [2021-11-23 12:56:33,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041919035] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:56:33,021 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:56:33,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 20 [2021-11-23 12:56:33,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657962683] [2021-11-23 12:56:33,021 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:56:33,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 12:56:33,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:56:33,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 12:56:33,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-23 12:56:33,023 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 21 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) [2021-11-23 12:56:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:33,120 INFO L93 Difference]: Finished difference Result 53 states and 52 transitions. [2021-11-23 12:56:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:56:33,121 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 21 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) Word has length 27 [2021-11-23 12:56:33,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:33,122 INFO L225 Difference]: With dead ends: 53 [2021-11-23 12:56:33,122 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 12:56:33,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-23 12:56:33,123 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:33,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 248 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2021-11-23 12:56:33,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 12:56:33,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2021-11-23 12:56:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.065217391304348) internal successors, (49), 48 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) [2021-11-23 12:56:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-11-23 12:56:33,126 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 27 [2021-11-23 12:56:33,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:33,127 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-11-23 12:56:33,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 21 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) [2021-11-23 12:56:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-11-23 12:56:33,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 12:56:33,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:33,128 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, 1, 1, 1, 1, 1, 1] [2021-11-23 12:56:33,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-23 12:56:33,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:56:33,336 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:56:33,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:33,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2138820753, now seen corresponding path program 1 times [2021-11-23 12:56:33,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:56:33,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612266802] [2021-11-23 12:56:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:33,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:56:33,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:56:33,338 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:56:33,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 12:56:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:33,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 12:56:33,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:33,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:56:33,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 12:56:33,636 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-11-23 12:56:33,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 41 [2021-11-23 12:56:33,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:56:33,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2021-11-23 12:56:34,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2021-11-23 12:56:34,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:56:34,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2021-11-23 12:56:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:34,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:43,956 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:56:43,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612266802] [2021-11-23 12:56:43,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612266802] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:56:43,956 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:56:43,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 11] imperfect sequences [] total 23 [2021-11-23 12:56:43,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942631047] [2021-11-23 12:56:43,957 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:56:43,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 12:56:43,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:56:43,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 12:56:43,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=452, Unknown=4, NotChecked=0, Total=552 [2021-11-23 12:56:43,958 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 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) [2021-11-23 12:56:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:56:44,138 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-11-23 12:56:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 12:56:44,138 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 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) Word has length 28 [2021-11-23 12:56:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:56:44,139 INFO L225 Difference]: With dead ends: 48 [2021-11-23 12:56:44,139 INFO L226 Difference]: Without dead ends: 48 [2021-11-23 12:56:44,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=103, Invalid=493, Unknown=4, NotChecked=0, Total=600 [2021-11-23 12:56:44,140 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 49 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:56:44,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 319 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2021-11-23 12:56:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-23 12:56:44,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-23 12:56:44,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 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) [2021-11-23 12:56:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-11-23 12:56:44,143 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 28 [2021-11-23 12:56:44,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:56:44,143 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-11-23 12:56:44,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 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) [2021-11-23 12:56:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-11-23 12:56:44,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 12:56:44,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:56:44,145 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, 1, 1, 1, 1, 1, 1] [2021-11-23 12:56:44,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 12:56:44,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:56:44,356 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-23 12:56:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:56:44,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1929883925, now seen corresponding path program 1 times [2021-11-23 12:56:44,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:56:44,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219555413] [2021-11-23 12:56:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:56:44,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:56:44,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:56:44,358 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:56:44,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e620b037-fad2-40ae-9e3d-e81f194fa599/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 12:56:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:56:44,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 12:56:44,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:56:44,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:56:44,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 12:56:44,773 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-11-23 12:56:44,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 42 [2021-11-23 12:56:44,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 12:56:44,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 54 [2021-11-23 12:56:45,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2021-11-23 12:56:45,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:56:45,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-11-23 12:56:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:56:45,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:56:59,706 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 12:56:59,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1192 treesize of output 1112