./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:53:26,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:53:26,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:53:26,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:53:26,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:53:26,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:53:26,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:53:26,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:53:26,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:53:26,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:53:26,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:53:26,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:53:26,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:53:26,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:53:26,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:53:26,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:53:26,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:53:26,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:53:26,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:53:26,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:53:26,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:53:26,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:53:26,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:53:26,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:53:26,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:53:26,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:53:26,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:53:26,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:53:26,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:53:26,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:53:26,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:53:26,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:53:26,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:53:26,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:53:26,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:53:26,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:53:26,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:53:26,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:53:26,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:53:26,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:53:26,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:53:26,786 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 00:53:26,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:53:26,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:53:26,839 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:53:26,845 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:53:26,846 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:53:26,846 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:53:26,846 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:53:26,846 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:53:26,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:53:26,847 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:53:26,848 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:53:26,848 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:53:26,849 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:53:26,849 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:53:26,849 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:53:26,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 00:53:26,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 00:53:26,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:53:26,851 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:53:26,853 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 00:53:26,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:53:26,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:53:26,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:53:26,859 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 00:53:26,860 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 00:53:26,860 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 00:53:26,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:53:26,860 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:53:26,862 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:53:26,862 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:53:26,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:53:26,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:53:26,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:26,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:53:26,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:53:26,865 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:53:26,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:53:26,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:53:26,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:53:26,866 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-11-07 00:53:27,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:53:27,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:53:27,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:53:27,177 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:53:27,178 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:53:27,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-07 00:53:27,263 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/data/65936445c/a09e9ffd7f8f4322b719d3a79372913e/FLAG2eb75db5b [2021-11-07 00:53:27,921 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:53:27,921 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-07 00:53:27,960 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/data/65936445c/a09e9ffd7f8f4322b719d3a79372913e/FLAG2eb75db5b [2021-11-07 00:53:28,183 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/data/65936445c/a09e9ffd7f8f4322b719d3a79372913e [2021-11-07 00:53:28,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:53:28,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:53:28,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:28,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:53:28,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:53:28,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:28" (1/1) ... [2021-11-07 00:53:28,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b88b603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:28, skipping insertion in model container [2021-11-07 00:53:28,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:28" (1/1) ... [2021-11-07 00:53:28,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:53:28,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:28,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:28,699 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) [2021-11-07 00:53:28,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c48e98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:28, skipping insertion in model container [2021-11-07 00:53:28,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:28,701 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:53:28,703 INFO L168 Benchmark]: Toolchain (without parser) took 514.70 ms. Allocated memory is still 125.8 MB. Free memory was 81.3 MB in the beginning and 98.3 MB in the end (delta: -17.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 00:53:28,703 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 125.8 MB. Free memory is still 98.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:53:28,704 INFO L168 Benchmark]: CACSL2BoogieTranslator took 511.84 ms. Allocated memory is still 125.8 MB. Free memory was 81.1 MB in the beginning and 98.3 MB in the end (delta: -17.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 00:53:28,706 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 125.8 MB. Free memory is still 98.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 511.84 ms. Allocated memory is still 125.8 MB. Free memory was 81.1 MB in the beginning and 98.3 MB in the end (delta: -17.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 533]: 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_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:53:31,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:53:31,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:53:31,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:53:31,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:53:31,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:53:31,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:53:31,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:53:31,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:53:31,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:53:31,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:53:31,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:53:31,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:53:31,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:53:31,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:53:31,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:53:31,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:53:31,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:53:31,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:53:31,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:53:31,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:53:31,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:53:31,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:53:31,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:53:31,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:53:31,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:53:31,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:53:31,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:53:31,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:53:31,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:53:31,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:53:31,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:53:31,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:53:31,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:53:31,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:53:31,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:53:31,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:53:31,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:53:31,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:53:31,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:53:31,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:53:31,220 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 00:53:31,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:53:31,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:53:31,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:53:31,271 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:53:31,271 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:53:31,272 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:53:31,272 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:53:31,272 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:53:31,272 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:53:31,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 00:53:31,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 00:53:31,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:53:31,276 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:53:31,276 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 00:53:31,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:53:31,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:53:31,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:53:31,277 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 00:53:31,277 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 00:53:31,277 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 00:53:31,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:53:31,278 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:53:31,278 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:53:31,278 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:53:31,279 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:53:31,279 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:53:31,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:53:31,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:53:31,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:53:31,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:31,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:53:31,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:53:31,281 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:53:31,281 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:53:31,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:53:31,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:53:31,282 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_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-11-07 00:53:31,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:53:31,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:53:31,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:53:31,763 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:53:31,763 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:53:31,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-07 00:53:31,850 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/data/0c54d6ebc/c0105e056f9a437d949ababa30a92bcd/FLAG72d3735fc [2021-11-07 00:53:32,434 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:53:32,435 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-07 00:53:32,456 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/data/0c54d6ebc/c0105e056f9a437d949ababa30a92bcd/FLAG72d3735fc [2021-11-07 00:53:32,693 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/data/0c54d6ebc/c0105e056f9a437d949ababa30a92bcd [2021-11-07 00:53:32,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:53:32,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:53:32,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:32,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:53:32,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:53:32,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:32" (1/1) ... [2021-11-07 00:53:32,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2286bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:32, skipping insertion in model container [2021-11-07 00:53:32,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:32" (1/1) ... [2021-11-07 00:53:32,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:53:32,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:33,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:33,136 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:53:33,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:33,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:33,209 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:53:33,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:33,291 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:53:33,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:33 WrapperNode [2021-11-07 00:53:33,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:33,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:33,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:53:33,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:53:33,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:33" (1/1) ... [2021-11-07 00:53:33,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:33" (1/1) ... [2021-11-07 00:53:33,370 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:33,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:53:33,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:53:33,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:53:33,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:33" (1/1) ... [2021-11-07 00:53:33,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:33" (1/1) ... [2021-11-07 00:53:33,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:33" (1/1) ... [2021-11-07 00:53:33,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:33" (1/1) ... [2021-11-07 00:53:33,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:33" (1/1) ... [2021-11-07 00:53:33,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:33" (1/1) ... [2021-11-07 00:53:33,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:33" (1/1) ... [2021-11-07 00:53:33,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:53:33,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:53:33,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:53:33,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:53:33,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:33" (1/1) ... [2021-11-07 00:53:33,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:33,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:53:33,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:53:33,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:53:33,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 00:53:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:53:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 00:53:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 00:53:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:53:33,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:53:34,097 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:53:34,098 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-07 00:53:34,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:53:34 BoogieIcfgContainer [2021-11-07 00:53:34,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:53:34,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:53:34,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:53:34,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:53:34,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:53:32" (1/3) ... [2021-11-07 00:53:34,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1478a580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:53:34, skipping insertion in model container [2021-11-07 00:53:34,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:33" (2/3) ... [2021-11-07 00:53:34,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1478a580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:53:34, skipping insertion in model container [2021-11-07 00:53:34,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:53:34" (3/3) ... [2021-11-07 00:53:34,109 INFO L111 eAbstractionObserver]: Analyzing ICFG array02-alloca-2.i [2021-11-07 00:53:34,115 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:53:34,116 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-07 00:53:34,181 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:53:34,190 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 [2021-11-07 00:53:34,190 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-07 00:53:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 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) [2021-11-07 00:53:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 00:53:34,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:34,231 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 00:53:34,232 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:53:34,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:34,237 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-07 00:53:34,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:34,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090602347] [2021-11-07 00:53:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:34,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:34,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:34,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:34,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:53:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:34,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:53:34,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:34,421 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 [2021-11-07 00:53:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:34,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:34,477 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:34,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090602347] [2021-11-07 00:53:34,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090602347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:34,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:34,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:53:34,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43428764] [2021-11-07 00:53:34,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:34,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:34,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:34,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:34,511 INFO L87 Difference]: Start difference. First operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 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) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:34,660 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-11-07 00:53:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:34,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 00:53:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:34,671 INFO L225 Difference]: With dead ends: 41 [2021-11-07 00:53:34,672 INFO L226 Difference]: Without dead ends: 39 [2021-11-07 00:53:34,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:34,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-07 00:53:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-07 00:53:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.72) internal successors, (43), 38 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) [2021-11-07 00:53:34,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-07 00:53:34,713 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 6 [2021-11-07 00:53:34,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:34,713 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-07 00:53:34,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-07 00:53:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 00:53:34,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:34,714 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 00:53:34,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:34,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:34,926 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:53:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-07 00:53:34,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:34,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641067110] [2021-11-07 00:53:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:34,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:34,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:34,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:34,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:53:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:34,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:53:34,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:35,053 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 [2021-11-07 00:53:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:35,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:35,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:35,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641067110] [2021-11-07 00:53:35,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641067110] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:35,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:35,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 00:53:35,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503128074] [2021-11-07 00:53:35,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:53:35,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:35,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:53:35,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:53:35,317 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:36,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:36,147 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-11-07 00:53:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:53:36,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 00:53:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:36,151 INFO L225 Difference]: With dead ends: 111 [2021-11-07 00:53:36,151 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 00:53:36,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:53:36,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 00:53:36,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 43. [2021-11-07 00:53:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-11-07 00:53:36,161 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 6 [2021-11-07 00:53:36,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:36,162 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-11-07 00:53:36,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-11-07 00:53:36,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 00:53:36,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:36,164 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:36,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:36,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:36,384 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:53:36,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:36,385 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-11-07 00:53:36,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:36,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281442099] [2021-11-07 00:53:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:36,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:36,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:36,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:36,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:53:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:36,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:53:36,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:36,455 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 [2021-11-07 00:53:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:36,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:36,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:36,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281442099] [2021-11-07 00:53:36,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281442099] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:36,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:36,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:36,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067388098] [2021-11-07 00:53:36,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:53:36,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:36,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:53:36,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:36,523 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:36,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:36,699 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-07 00:53:36,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:53:36,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 00:53:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:36,701 INFO L225 Difference]: With dead ends: 37 [2021-11-07 00:53:36,701 INFO L226 Difference]: Without dead ends: 37 [2021-11-07 00:53:36,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:53:36,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-07 00:53:36,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-07 00:53:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-07 00:53:36,706 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2021-11-07 00:53:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:36,707 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-07 00:53:36,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-07 00:53:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 00:53:36,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:36,708 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:36,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:36,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:36,919 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:53:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-11-07 00:53:36,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:36,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74306695] [2021-11-07 00:53:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:36,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:36,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:36,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:36,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:53:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:36,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 00:53:36,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:37,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:53:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:37,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:37,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:37,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74306695] [2021-11-07 00:53:37,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74306695] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:37,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:37,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-07 00:53:37,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164542721] [2021-11-07 00:53:37,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:53:37,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:37,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:53:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:53:37,536 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-07 00:53:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:38,033 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-11-07 00:53:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:53:38,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 8 [2021-11-07 00:53:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:38,036 INFO L225 Difference]: With dead ends: 39 [2021-11-07 00:53:38,037 INFO L226 Difference]: Without dead ends: 39 [2021-11-07 00:53:38,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:53:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-07 00:53:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-11-07 00:53:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-07 00:53:38,041 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 8 [2021-11-07 00:53:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:38,041 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-07 00:53:38,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-07 00:53:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-07 00:53:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 00:53:38,042 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:38,042 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:38,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 00:53:38,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:38,247 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:53:38,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:38,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-07 00:53:38,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:38,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927308902] [2021-11-07 00:53:38,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:38,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:38,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:38,250 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:38,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:53:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:38,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:53:38,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:38,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:38,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:38,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927308902] [2021-11-07 00:53:38,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927308902] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:53:38,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1289055037] [2021-11-07 00:53:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:38,508 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:53:38,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:53:38,520 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:53:38,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 00:53:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:38,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:53:38,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:38,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:38,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1289055037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:53:38,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968535578] [2021-11-07 00:53:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:38,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:53:38,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:53:38,758 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:53:38,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 00:53:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:38,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:53:38,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:38,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:38,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968535578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:53:38,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:53:38,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-07 00:53:38,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038227635] [2021-11-07 00:53:38,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:53:38,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:38,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:53:38,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:53:38,958 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:39,036 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-11-07 00:53:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:53:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 00:53:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:39,040 INFO L225 Difference]: With dead ends: 59 [2021-11-07 00:53:39,040 INFO L226 Difference]: Without dead ends: 59 [2021-11-07 00:53:39,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:53:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-07 00:53:39,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2021-11-07 00:53:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 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) [2021-11-07 00:53:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-07 00:53:39,048 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 10 [2021-11-07 00:53:39,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:39,067 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-07 00:53:39,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-07 00:53:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 00:53:39,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:39,068 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:39,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:39,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:39,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:39,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:53:39,669 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:53:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:39,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-07 00:53:39,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:39,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873817075] [2021-11-07 00:53:39,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:39,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:39,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:39,671 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:39,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:53:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:39,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 00:53:39,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:39,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:53:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:40,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:40,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:40,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873817075] [2021-11-07 00:53:40,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873817075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:53:40,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [159408806] [2021-11-07 00:53:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:40,701 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:53:40,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:53:40,702 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:53:40,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 00:53:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:40,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 00:53:40,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:40,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:53:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:41,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:41,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [159408806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:53:41,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824589100] [2021-11-07 00:53:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:41,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:53:41,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:53:41,441 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:53:41,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 00:53:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:41,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 00:53:41,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:41,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:53:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:41,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:42,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824589100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:53:42,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:53:42,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-11-07 00:53:42,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425996132] [2021-11-07 00:53:42,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 00:53:42,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:42,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 00:53:42,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:53:42,021 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 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) [2021-11-07 00:53:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:43,415 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2021-11-07 00:53:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 00:53:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 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 10 [2021-11-07 00:53:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:43,418 INFO L225 Difference]: With dead ends: 92 [2021-11-07 00:53:43,418 INFO L226 Difference]: Without dead ends: 92 [2021-11-07 00:53:43,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-11-07 00:53:43,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-07 00:53:43,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 50. [2021-11-07 00:53:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:43,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-07 00:53:43,424 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 10 [2021-11-07 00:53:43,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:43,425 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-07 00:53:43,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 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) [2021-11-07 00:53:43,425 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-07 00:53:43,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 00:53:43,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:43,426 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:43,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:43,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-07 00:53:43,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:44,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:44,039 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:53:44,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:44,040 INFO L85 PathProgramCache]: Analyzing trace with hash 363893421, now seen corresponding path program 1 times [2021-11-07 00:53:44,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:44,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171102798] [2021-11-07 00:53:44,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:44,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:44,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:44,041 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:44,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 00:53:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:44,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:53:44,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:53:44,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:53:44,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:44,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171102798] [2021-11-07 00:53:44,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171102798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:44,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:44,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:53:44,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812945557] [2021-11-07 00:53:44,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:53:44,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:44,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:53:44,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:53:44,274 INFO L87 Difference]: Start difference. First operand 50 states and 58 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) [2021-11-07 00:53:44,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:44,526 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2021-11-07 00:53:44,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:53:44,528 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 13 [2021-11-07 00:53:44,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:44,530 INFO L225 Difference]: With dead ends: 84 [2021-11-07 00:53:44,531 INFO L226 Difference]: Without dead ends: 84 [2021-11-07 00:53:44,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:53:44,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-07 00:53:44,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 50. [2021-11-07 00:53:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-11-07 00:53:44,538 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 13 [2021-11-07 00:53:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:44,538 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-11-07 00:53:44,538 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) [2021-11-07 00:53:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-11-07 00:53:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 00:53:44,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:44,540 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:44,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:44,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:44,750 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:53:44,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:44,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2110205631, now seen corresponding path program 1 times [2021-11-07 00:53:44,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:44,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791550637] [2021-11-07 00:53:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:44,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:44,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:44,752 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:44,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 00:53:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:44,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:53:44,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:53:45,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:53:45,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:45,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791550637] [2021-11-07 00:53:45,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791550637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:53:45,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [663090825] [2021-11-07 00:53:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:45,097 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:53:45,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:53:45,099 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:53:45,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 00:53:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:45,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:53:45,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:53:45,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:53:45,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [663090825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:53:45,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189481562] [2021-11-07 00:53:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:45,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:53:45,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:53:45,493 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:53:45,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 00:53:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:45,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:53:45,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:53:45,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:53:45,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189481562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:53:45,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:53:45,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-07 00:53:45,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685394718] [2021-11-07 00:53:45,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:53:45,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:45,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:53:45,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:53:45,824 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:46,000 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-11-07 00:53:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:53:46,003 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 [2021-11-07 00:53:46,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:46,004 INFO L225 Difference]: With dead ends: 69 [2021-11-07 00:53:46,004 INFO L226 Difference]: Without dead ends: 69 [2021-11-07 00:53:46,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:53:46,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-07 00:53:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2021-11-07 00:53:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 65 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) [2021-11-07 00:53:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2021-11-07 00:53:46,017 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 18 [2021-11-07 00:53:46,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:46,017 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2021-11-07 00:53:46,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2021-11-07 00:53:46,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 00:53:46,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:46,019 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:46,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:46,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:46,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:46,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:46,626 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:53:46,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:46,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1163693311, now seen corresponding path program 1 times [2021-11-07 00:53:46,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:46,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138328386] [2021-11-07 00:53:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:46,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:46,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:46,629 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:46,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 00:53:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:46,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 00:53:46,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:46,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:53:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:53:47,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:53:48,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:48,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138328386] [2021-11-07 00:53:48,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138328386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:53:48,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1808838296] [2021-11-07 00:53:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:48,189 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:53:48,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:53:48,190 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:53:48,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 00:53:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:48,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 00:53:48,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:48,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:49,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1808838296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:53:49,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550540343] [2021-11-07 00:53:49,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:49,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:53:49,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:53:49,207 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:53:49,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 00:53:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:49,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 00:53:49,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:49,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:53:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:53:49,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:53:50,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550540343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:53:50,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:53:50,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 6, 6] total 26 [2021-11-07 00:53:50,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867746097] [2021-11-07 00:53:50,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 00:53:50,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 00:53:50,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-11-07 00:53:50,312 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 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) [2021-11-07 00:53:52,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:52,975 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2021-11-07 00:53:52,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 00:53:52,976 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 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) Word has length 18 [2021-11-07 00:53:52,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:52,977 INFO L225 Difference]: With dead ends: 136 [2021-11-07 00:53:52,977 INFO L226 Difference]: Without dead ends: 136 [2021-11-07 00:53:52,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=377, Invalid=1515, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 00:53:52,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-07 00:53:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 108. [2021-11-07 00:53:52,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 105 states have (on average 1.2) internal successors, (126), 107 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2021-11-07 00:53:52,986 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 18 [2021-11-07 00:53:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:52,986 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2021-11-07 00:53:52,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 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) [2021-11-07 00:53:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2021-11-07 00:53:52,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 00:53:52,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:52,988 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:53,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:53,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:53,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 00:53:53,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:53,615 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:53:53,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:53,616 INFO L85 PathProgramCache]: Analyzing trace with hash -991865623, now seen corresponding path program 1 times [2021-11-07 00:53:53,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:53,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974921373] [2021-11-07 00:53:53,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:53,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:53,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:53,618 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:53,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 00:53:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:53,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:53:53,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:53,875 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 [2021-11-07 00:53:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 00:53:54,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 00:53:56,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:56,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974921373] [2021-11-07 00:53:56,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974921373] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:56,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:56,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-07 00:53:56,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279521735] [2021-11-07 00:53:56,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:53:56,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:56,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:53:56,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-11-07 00:53:56,213 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 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) [2021-11-07 00:53:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:56,359 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2021-11-07 00:53:56,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:53:56,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 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 [2021-11-07 00:53:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:56,362 INFO L225 Difference]: With dead ends: 107 [2021-11-07 00:53:56,362 INFO L226 Difference]: Without dead ends: 83 [2021-11-07 00:53:56,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2021-11-07 00:53:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-07 00:53:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-07 00:53:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 82 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2021-11-07 00:53:56,368 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 19 [2021-11-07 00:53:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:56,368 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2021-11-07 00:53:56,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 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) [2021-11-07 00:53:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2021-11-07 00:53:56,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 00:53:56,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:56,369 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-07 00:53:56,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:56,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:56,579 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:53:56,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:56,579 INFO L85 PathProgramCache]: Analyzing trace with hash 302966996, now seen corresponding path program 2 times [2021-11-07 00:53:56,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:56,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678348278] [2021-11-07 00:53:56,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 00:53:56,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:56,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:56,580 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:56,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 00:53:56,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 00:53:56,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:53:56,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 00:53:56,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:56,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:53:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:57,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:59,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:59,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678348278] [2021-11-07 00:53:59,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678348278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:53:59,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1037162757] [2021-11-07 00:53:59,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 00:53:59,541 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:53:59,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:53:59,551 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:53:59,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 00:53:59,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 00:53:59,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:53:59,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 00:53:59,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:00,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:54:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:00,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:01,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1037162757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:54:01,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366044102] [2021-11-07 00:54:01,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 00:54:01,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:54:01,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:54:01,379 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:54:01,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 00:54:01,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 00:54:01,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:54:01,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 00:54:01,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:01,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:54:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:02,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:04,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366044102] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:54:04,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:54:04,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 27 [2021-11-07 00:54:04,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68860817] [2021-11-07 00:54:04,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 00:54:04,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:04,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 00:54:04,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2021-11-07 00:54:04,273 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 28 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) [2021-11-07 00:54:12,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:12,168 INFO L93 Difference]: Finished difference Result 527 states and 600 transitions. [2021-11-07 00:54:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 00:54:12,170 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 28 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) Word has length 22 [2021-11-07 00:54:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:12,173 INFO L225 Difference]: With dead ends: 527 [2021-11-07 00:54:12,173 INFO L226 Difference]: Without dead ends: 527 [2021-11-07 00:54:12,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=463, Invalid=1097, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 00:54:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-07 00:54:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 107. [2021-11-07 00:54:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.180952380952381) internal successors, (124), 106 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2021-11-07 00:54:12,189 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 22 [2021-11-07 00:54:12,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:12,189 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2021-11-07 00:54:12,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 28 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) [2021-11-07 00:54:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2021-11-07 00:54:12,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 00:54:12,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:12,191 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:12,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:12,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:12,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 00:54:12,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:12,795 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:54:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash 408917070, now seen corresponding path program 2 times [2021-11-07 00:54:12,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:12,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694486119] [2021-11-07 00:54:12,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 00:54:12,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:12,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:12,797 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:12,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 00:54:13,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 00:54:13,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:54:13,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 00:54:13,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:13,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:54:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:14,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:17,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:17,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694486119] [2021-11-07 00:54:17,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694486119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:54:17,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [656368844] [2021-11-07 00:54:17,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 00:54:17,392 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:54:17,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:54:17,393 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:54:17,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 00:54:18,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 00:54:18,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:54:18,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 00:54:18,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 00:54:18,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 00:54:20,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [656368844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:54:20,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95049835] [2021-11-07 00:54:20,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 00:54:20,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:54:20,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:54:20,011 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:54:20,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 00:54:20,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 00:54:20,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:54:20,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 00:54:20,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:54:21,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 00:54:22,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95049835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:54:22,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:54:22,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 10] total 49 [2021-11-07 00:54:22,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190015879] [2021-11-07 00:54:22,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 00:54:22,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:22,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 00:54:22,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 00:54:22,284 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 49 states, 49 states have (on average 3.4693877551020407) internal successors, (170), 49 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:35,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:35,711 INFO L93 Difference]: Finished difference Result 188 states and 213 transitions. [2021-11-07 00:54:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 00:54:35,713 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.4693877551020407) internal successors, (170), 49 states have internal predecessors, (170), 0 states have call successors, (0), 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 40 [2021-11-07 00:54:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:35,714 INFO L225 Difference]: With dead ends: 188 [2021-11-07 00:54:35,714 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 00:54:35,715 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=646, Invalid=3776, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 00:54:35,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 00:54:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-11-07 00:54:35,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.161904761904762) internal successors, (122), 106 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2021-11-07 00:54:35,721 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 40 [2021-11-07 00:54:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:35,722 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2021-11-07 00:54:35,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.4693877551020407) internal successors, (170), 49 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2021-11-07 00:54:35,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 00:54:35,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:35,724 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-07 00:54:35,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:35,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-07 00:54:36,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:36,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:54:36,352 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:54:36,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1048882662, now seen corresponding path program 3 times [2021-11-07 00:54:36,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:36,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084873554] [2021-11-07 00:54:36,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 00:54:36,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:36,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:36,354 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:36,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 00:54:37,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 00:54:37,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:54:37,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 00:54:37,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:37,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:54:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:38,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:43,113 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:43,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084873554] [2021-11-07 00:54:43,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084873554] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:54:43,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [257156635] [2021-11-07 00:54:43,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 00:54:43,114 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:54:43,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:54:43,115 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:54:43,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 00:54:45,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 00:54:45,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:54:45,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 00:54:45,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:45,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:54:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:47,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:03,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [257156635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:55:03,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320921104] [2021-11-07 00:55:03,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 00:55:03,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:55:03,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:55:03,543 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:55:03,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 00:55:09,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 00:55:09,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:55:09,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 00:55:09,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:55:09,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:55:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:10,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:55:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:22,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320921104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:55:22,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:55:22,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17, 21, 19, 19] total 72 [2021-11-07 00:55:22,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581734796] [2021-11-07 00:55:22,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-07 00:55:22,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:55:22,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-07 00:55:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1413, Invalid=3843, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 00:55:22,926 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 73 states, 72 states have (on average 3.0) internal successors, (216), 73 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:17,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:17,987 INFO L93 Difference]: Finished difference Result 1175 states and 1338 transitions. [2021-11-07 00:57:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 00:57:17,989 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 3.0) internal successors, (216), 73 states have internal predecessors, (216), 0 states have call successors, (0), 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 46 [2021-11-07 00:57:17,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:17,994 INFO L225 Difference]: With dead ends: 1175 [2021-11-07 00:57:17,994 INFO L226 Difference]: Without dead ends: 1175 [2021-11-07 00:57:17,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 201 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4261 ImplicationChecksByTransitivity, 71.5s TimeCoverageRelationStatistics Valid=2801, Invalid=7099, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 00:57:18,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-11-07 00:57:18,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 155. [2021-11-07 00:57:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 154 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2021-11-07 00:57:18,012 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 46 [2021-11-07 00:57:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:18,013 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2021-11-07 00:57:18,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 3.0) internal successors, (216), 73 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:18,014 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2021-11-07 00:57:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 00:57:18,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:18,016 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:18,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:18,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:18,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-07 00:57:18,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:18,639 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:57:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:18,640 INFO L85 PathProgramCache]: Analyzing trace with hash 82156500, now seen corresponding path program 3 times [2021-11-07 00:57:18,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:18,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376994504] [2021-11-07 00:57:18,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 00:57:18,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:18,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:18,642 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:18,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 00:57:19,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 00:57:19,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:57:19,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 00:57:19,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:19,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:57:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 00:57:20,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 00:57:23,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:23,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376994504] [2021-11-07 00:57:23,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376994504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:23,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [127487675] [2021-11-07 00:57:23,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 00:57:23,749 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:23,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:57:23,750 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:57:23,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 00:57:25,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 00:57:25,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:57:25,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 00:57:25,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:25,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:57:27,715 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 17 treesize of output 13 [2021-11-07 00:57:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:27,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:37,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [127487675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:37,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160001078] [2021-11-07 00:57:37,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 00:57:37,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:57:37,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:57:37,920 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:57:37,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 00:57:39,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 00:57:39,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:57:39,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 00:57:39,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:39,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:57:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 00:57:41,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 00:57:45,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160001078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:45,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:57:45,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 16, 18, 11, 11] total 60 [2021-11-07 00:57:45,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367028736] [2021-11-07 00:57:45,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-07 00:57:45,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:45,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-07 00:57:45,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=3091, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 00:57:45,959 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand has 60 states, 60 states have (on average 3.5166666666666666) internal successors, (211), 60 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:38,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:38,158 INFO L93 Difference]: Finished difference Result 303 states and 349 transitions. [2021-11-07 00:58:38,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 00:58:38,158 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.5166666666666666) internal successors, (211), 60 states have internal predecessors, (211), 0 states have call successors, (0), 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 48 [2021-11-07 00:58:38,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:38,160 INFO L225 Difference]: With dead ends: 303 [2021-11-07 00:58:38,160 INFO L226 Difference]: Without dead ends: 245 [2021-11-07 00:58:38,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 58.0s TimeCoverageRelationStatistics Valid=1332, Invalid=6500, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 00:58:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-07 00:58:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 239. [2021-11-07 00:58:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 237 states have (on average 1.1687763713080168) internal successors, (277), 238 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 277 transitions. [2021-11-07 00:58:38,170 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 277 transitions. Word has length 48 [2021-11-07 00:58:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:38,171 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 277 transitions. [2021-11-07 00:58:38,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.5166666666666666) internal successors, (211), 60 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 277 transitions. [2021-11-07 00:58:38,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 00:58:38,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:38,176 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:38,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:38,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:38,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:38,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:58:38,783 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 00:58:38,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:38,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1296990993, now seen corresponding path program 4 times [2021-11-07 00:58:38,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:38,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085887371] [2021-11-07 00:58:38,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 00:58:38,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:38,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:38,795 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:38,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 00:58:40,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 00:58:40,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:58:40,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 00:58:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:40,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:58:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 122 proven. 199 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 00:58:42,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:51,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:51,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085887371] [2021-11-07 00:58:51,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085887371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:51,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1958313992] [2021-11-07 00:58:51,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 00:58:51,761 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:51,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:51,762 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:51,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 00:58:53,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 00:58:53,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:58:53,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 00:58:53,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 160 proven. 110 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-07 00:58:56,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 160 proven. 110 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-07 00:59:00,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1958313992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:00,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914844513] [2021-11-07 00:59:00,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 00:59:00,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:59:00,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:59:00,356 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:59:00,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 00:59:02,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 00:59:02,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:59:02,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 00:59:02,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:02,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 00:59:02,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-07 00:59:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 160 proven. 110 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-07 00:59:04,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 160 proven. 110 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-07 00:59:08,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914844513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:08,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:59:08,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 17, 16, 19, 17] total 83 [2021-11-07 00:59:08,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467527859] [2021-11-07 00:59:08,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 00:59:08,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:08,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 00:59:08,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=6286, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 00:59:08,622 INFO L87 Difference]: Start difference. First operand 239 states and 277 transitions. Second operand has 83 states, 83 states have (on average 4.0120481927710845) internal successors, (333), 83 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:20,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:20,011 INFO L93 Difference]: Finished difference Result 490 states and 559 transitions. [2021-11-07 01:00:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 01:00:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 4.0120481927710845) internal successors, (333), 83 states have internal predecessors, (333), 0 states have call successors, (0), 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 88 [2021-11-07 01:00:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:20,017 INFO L225 Difference]: With dead ends: 490 [2021-11-07 01:00:20,017 INFO L226 Difference]: Without dead ends: 418 [2021-11-07 01:00:20,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 68.2s TimeCoverageRelationStatistics Valid=1799, Invalid=13453, Unknown=0, NotChecked=0, Total=15252 [2021-11-07 01:00:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-07 01:00:20,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 254. [2021-11-07 01:00:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 252 states have (on average 1.1626984126984128) internal successors, (293), 253 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 293 transitions. [2021-11-07 01:00:20,033 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 293 transitions. Word has length 88 [2021-11-07 01:00:20,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:20,034 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 293 transitions. [2021-11-07 01:00:20,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 4.0120481927710845) internal successors, (333), 83 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:20,035 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 293 transitions. [2021-11-07 01:00:20,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:00:20,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:20,037 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1] [2021-11-07 01:00:20,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-07 01:00:20,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:20,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:20,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:00:20,658 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-07 01:00:20,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:20,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2084926986, now seen corresponding path program 4 times [2021-11-07 01:00:20,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:20,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364454711] [2021-11-07 01:00:20,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:00:20,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:20,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:20,661 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:20,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:00:22,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:00:22,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:00:22,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 01:00:22,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:22,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:00:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:25,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:45,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:45,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364454711] [2021-11-07 01:00:45,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364454711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:00:45,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [39147100] [2021-11-07 01:00:45,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:00:45,287 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:00:45,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:00:45,287 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:00:45,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 01:00:47,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:00:47,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:00:47,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 01:00:48,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:48,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:00:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:51,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:58,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [39147100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:00:58,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040323824] [2021-11-07 01:00:58,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:00:58,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:00:58,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:00:58,914 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:00:58,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211394e7-6848-4f27-8644-1aa395536821/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 01:01:01,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:01:01,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:01:01,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 01:01:01,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:01,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 01:01:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:06,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:01:46,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040323824] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:01:46,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:01:46,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29, 29, 39, 39] total 129 [2021-11-07 01:01:46,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543900106] [2021-11-07 01:01:46,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-11-07 01:01:46,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:46,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-11-07 01:01:46,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4311, Invalid=12459, Unknown=0, NotChecked=0, Total=16770 [2021-11-07 01:01:46,818 INFO L87 Difference]: Start difference. First operand 254 states and 293 transitions. Second operand has 130 states, 129 states have (on average 3.0852713178294575) internal successors, (398), 130 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:48,491 WARN L207 SmtUtils]: Spent 42.72 s on a formula simplification that was a NOOP. DAG size: 258 [2021-11-07 01:04:01,239 WARN L207 SmtUtils]: Spent 1.17 m on a formula simplification. DAG size of input: 254 DAG size of output: 254 [2021-11-07 01:05:05,804 WARN L207 SmtUtils]: Spent 37.52 s on a formula simplification that was a NOOP. DAG size: 248 [2021-11-07 01:06:14,433 WARN L207 SmtUtils]: Spent 1.10 m on a formula simplification. DAG size of input: 243 DAG size of output: 243 [2021-11-07 01:07:16,598 WARN L207 SmtUtils]: Spent 33.69 s on a formula simplification that was a NOOP. DAG size: 237