./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/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_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f690bd0b308b8d74e0ee0ea91ab3037911a0ede5caa4981030fbf7d571a3c297 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:30,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:30,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:30,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:30,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:30,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:30,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:30,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:30,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:30,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:30,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:30,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:30,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:30,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:30,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:30,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:30,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:30,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:30,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:30,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:30,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:30,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:30,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:30,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:30,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:30,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:30,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:30,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:30,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:30,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:30,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:30,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:30,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:30,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:30,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:30,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:30,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:30,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:30,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:30,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:30,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:30,725 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:25:30,773 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:30,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:30,774 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:30,775 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:30,775 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:30,776 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:30,776 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:25:30,776 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:30,777 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:30,777 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:25:30,777 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:25:30,778 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:30,778 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:25:30,778 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:25:30,779 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:25:30,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:30,782 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:25:30,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:25:30,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:25:30,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:30,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:30,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:30,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:30,785 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:30,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:25:30,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:30,786 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:30,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:30,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:30,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:30,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:30,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:30,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:30,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:30,792 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:25:30,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:25:30,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:30,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:30,794 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:30,795 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_64e2da5b-fe56-4487-9961-a92a6ace4a23/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f690bd0b308b8d74e0ee0ea91ab3037911a0ede5caa4981030fbf7d571a3c297 [2021-11-07 01:25:31,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:31,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:31,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:31,201 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:31,202 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:31,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product15.cil.c [2021-11-07 01:25:31,299 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/data/a7ec17699/cd26c82c41784bce9de8ce5b3b7d3184/FLAG18a8eb3a8 [2021-11-07 01:25:32,127 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:32,129 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/sv-benchmarks/c/product-lines/email_spec6_product15.cil.c [2021-11-07 01:25:32,170 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/data/a7ec17699/cd26c82c41784bce9de8ce5b3b7d3184/FLAG18a8eb3a8 [2021-11-07 01:25:32,228 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/data/a7ec17699/cd26c82c41784bce9de8ce5b3b7d3184 [2021-11-07 01:25:32,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:32,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:32,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:32,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:32,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:32,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:32" (1/1) ... [2021-11-07 01:25:32,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ae72a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:32, skipping insertion in model container [2021-11-07 01:25:32,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:32" (1/1) ... [2021-11-07 01:25:32,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:32,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:32,675 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/sv-benchmarks/c/product-lines/email_spec6_product15.cil.c[6819,6832] [2021-11-07 01:25:33,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:33,181 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 01:25:33,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@d37cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:33, skipping insertion in model container [2021-11-07 01:25:33,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:33,183 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:25:33,186 INFO L168 Benchmark]: Toolchain (without parser) took 950.68 ms. Allocated memory was 86.0 MB in the beginning and 123.7 MB in the end (delta: 37.7 MB). Free memory was 46.5 MB in the beginning and 87.6 MB in the end (delta: -41.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:25:33,187 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 86.0 MB. Free memory was 65.6 MB in the beginning and 65.6 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:25:33,189 INFO L168 Benchmark]: CACSL2BoogieTranslator took 925.87 ms. Allocated memory was 86.0 MB in the beginning and 123.7 MB in the end (delta: 37.7 MB). Free memory was 64.9 MB in the beginning and 87.6 MB in the end (delta: -22.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:33,192 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 86.0 MB. Free memory was 65.6 MB in the beginning and 65.6 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 925.87 ms. Allocated memory was 86.0 MB in the beginning and 123.7 MB in the end (delta: 37.7 MB). Free memory was 64.9 MB in the beginning and 87.6 MB in the end (delta: -22.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2569]: 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_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/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_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f690bd0b308b8d74e0ee0ea91ab3037911a0ede5caa4981030fbf7d571a3c297 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:36,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:36,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:36,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:36,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:36,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:36,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:36,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:36,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:36,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:36,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:36,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:36,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:36,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:36,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:36,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:36,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:36,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:36,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:36,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:36,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:36,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:36,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:36,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:36,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:36,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:36,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:36,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:36,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:36,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:36,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:36,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:36,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:36,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:36,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:36,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:36,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:36,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:36,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:36,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:36,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:36,391 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:25:36,450 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:36,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:36,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:36,453 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:36,453 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:36,453 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:36,454 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:36,454 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:36,454 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:36,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:36,458 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:25:36,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:25:36,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:36,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:36,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:36,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:36,460 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:36,460 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:25:36,460 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:25:36,461 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:25:36,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:36,461 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:36,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:36,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:36,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:25:36,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:36,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:36,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:36,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:36,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:36,464 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:25:36,465 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:36,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:36,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:36,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:36,466 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_64e2da5b-fe56-4487-9961-a92a6ace4a23/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f690bd0b308b8d74e0ee0ea91ab3037911a0ede5caa4981030fbf7d571a3c297 [2021-11-07 01:25:37,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:37,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:37,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:37,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:37,077 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:37,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product15.cil.c [2021-11-07 01:25:37,179 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/data/b28337b35/ab081a5dbfa742fdbf764942a073edcf/FLAG0ccdbaaf6 [2021-11-07 01:25:38,152 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:38,153 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/sv-benchmarks/c/product-lines/email_spec6_product15.cil.c [2021-11-07 01:25:38,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/data/b28337b35/ab081a5dbfa742fdbf764942a073edcf/FLAG0ccdbaaf6 [2021-11-07 01:25:38,268 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/data/b28337b35/ab081a5dbfa742fdbf764942a073edcf [2021-11-07 01:25:38,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:38,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:38,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:38,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:38,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:38,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:38" (1/1) ... [2021-11-07 01:25:38,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d13148f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:38, skipping insertion in model container [2021-11-07 01:25:38,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:38" (1/1) ... [2021-11-07 01:25:38,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:38,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:38,772 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/sv-benchmarks/c/product-lines/email_spec6_product15.cil.c[6819,6832] [2021-11-07 01:25:39,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:39,358 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:25:39,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:39,393 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/sv-benchmarks/c/product-lines/email_spec6_product15.cil.c[6819,6832] [2021-11-07 01:25:39,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:39,505 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:25:39,542 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/sv-benchmarks/c/product-lines/email_spec6_product15.cil.c[6819,6832] [2021-11-07 01:25:39,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:39,705 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:25:39,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:39 WrapperNode [2021-11-07 01:25:39,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:39,707 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:39,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:25:39,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:25:39,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:39" (1/1) ... [2021-11-07 01:25:39,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:39" (1/1) ... [2021-11-07 01:25:39,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:39,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:25:39,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:25:39,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:25:39,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:39" (1/1) ... [2021-11-07 01:25:39,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:39" (1/1) ... [2021-11-07 01:25:39,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:39" (1/1) ... [2021-11-07 01:25:39,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:39" (1/1) ... [2021-11-07 01:25:40,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:39" (1/1) ... [2021-11-07 01:25:40,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:39" (1/1) ... [2021-11-07 01:25:40,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:39" (1/1) ... [2021-11-07 01:25:40,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:25:40,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:25:40,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:25:40,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:25:40,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:39" (1/1) ... [2021-11-07 01:25:40,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:40,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:40,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:25:40,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:25:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:25:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:25:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:25:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:25:40,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:25:45,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:25:45,278 INFO L299 CfgBuilder]: Removed 267 assume(true) statements. [2021-11-07 01:25:45,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:45 BoogieIcfgContainer [2021-11-07 01:25:45,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:25:45,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:25:45,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:25:45,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:25:45,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:25:38" (1/3) ... [2021-11-07 01:25:45,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11859d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:45, skipping insertion in model container [2021-11-07 01:25:45,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:39" (2/3) ... [2021-11-07 01:25:45,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11859d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:45, skipping insertion in model container [2021-11-07 01:25:45,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:45" (3/3) ... [2021-11-07 01:25:45,297 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product15.cil.c [2021-11-07 01:25:45,304 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:25:45,305 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:25:45,387 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:25:45,400 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 01:25:45,400 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:25:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 425 states, 422 states have (on average 1.7630331753554502) internal successors, (744), 424 states have internal predecessors, (744), 0 states have call successors, (0), 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 01:25:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:25:45,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:45,487 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:45,488 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:45,500 INFO L85 PathProgramCache]: Analyzing trace with hash -286397701, now seen corresponding path program 1 times [2021-11-07 01:25:45,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:45,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675012278] [2021-11-07 01:25:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:45,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:45,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:45,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:45,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:25:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:46,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:25:46,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:46,424 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 01:25:46,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:46,631 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 01:25:46,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:46,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675012278] [2021-11-07 01:25:46,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675012278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:46,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:46,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:25:46,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968873207] [2021-11-07 01:25:46,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:25:46,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:46,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:25:46,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:25:46,668 INFO L87 Difference]: Start difference. First operand has 425 states, 422 states have (on average 1.7630331753554502) internal successors, (744), 424 states have internal predecessors, (744), 0 states have call successors, (0), 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 2 states, 2 states have (on average 25.0) internal successors, (50), 2 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 01:25:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:46,735 INFO L93 Difference]: Finished difference Result 608 states and 1047 transitions. [2021-11-07 01:25:46,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:25:46,737 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 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) Word has length 50 [2021-11-07 01:25:46,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:46,757 INFO L225 Difference]: With dead ends: 608 [2021-11-07 01:25:46,757 INFO L226 Difference]: Without dead ends: 386 [2021-11-07 01:25:46,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:25:46,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-07 01:25:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2021-11-07 01:25:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 384 states have (on average 1.7552083333333333) internal successors, (674), 385 states have internal predecessors, (674), 0 states have call successors, (0), 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 01:25:46,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 674 transitions. [2021-11-07 01:25:46,888 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 674 transitions. Word has length 50 [2021-11-07 01:25:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:46,889 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 674 transitions. [2021-11-07 01:25:46,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 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 01:25:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 674 transitions. [2021-11-07 01:25:46,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:25:46,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:46,895 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:46,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:47,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:47,114 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:47,115 INFO L85 PathProgramCache]: Analyzing trace with hash -919626264, now seen corresponding path program 1 times [2021-11-07 01:25:47,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:47,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330014601] [2021-11-07 01:25:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:47,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:47,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:47,120 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:47,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:25:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:25:47,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:47,878 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 01:25:47,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:48,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:48,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330014601] [2021-11-07 01:25:48,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330014601] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:48,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:48,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:25:48,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272859114] [2021-11-07 01:25:48,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:25:48,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:48,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:25:48,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:48,080 INFO L87 Difference]: Start difference. First operand 386 states and 674 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:48,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:48,232 INFO L93 Difference]: Finished difference Result 1128 states and 1974 transitions. [2021-11-07 01:25:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:25:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:25:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:48,242 INFO L225 Difference]: With dead ends: 1128 [2021-11-07 01:25:48,243 INFO L226 Difference]: Without dead ends: 757 [2021-11-07 01:25:48,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-11-07 01:25:48,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 385. [2021-11-07 01:25:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 383 states have (on average 1.7467362924281984) internal successors, (669), 384 states have internal predecessors, (669), 0 states have call successors, (0), 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 01:25:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 669 transitions. [2021-11-07 01:25:48,308 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 669 transitions. Word has length 51 [2021-11-07 01:25:48,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:48,309 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 669 transitions. [2021-11-07 01:25:48,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 669 transitions. [2021-11-07 01:25:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:25:48,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:48,323 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:48,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:48,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:48,524 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:48,525 INFO L85 PathProgramCache]: Analyzing trace with hash -224460850, now seen corresponding path program 1 times [2021-11-07 01:25:48,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:48,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762599437] [2021-11-07 01:25:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:48,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:48,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:48,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:48,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:25:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:49,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:25:49,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:49,237 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 01:25:49,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:49,455 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 01:25:49,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:49,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762599437] [2021-11-07 01:25:49,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762599437] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:49,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:49,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:25:49,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710448332] [2021-11-07 01:25:49,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:25:49,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:49,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:25:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:25:49,459 INFO L87 Difference]: Start difference. First operand 385 states and 669 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 01:25:49,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:49,753 INFO L93 Difference]: Finished difference Result 1457 states and 2538 transitions. [2021-11-07 01:25:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:25:49,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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) Word has length 53 [2021-11-07 01:25:49,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:49,764 INFO L225 Difference]: With dead ends: 1457 [2021-11-07 01:25:49,764 INFO L226 Difference]: Without dead ends: 1090 [2021-11-07 01:25:49,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:25:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-11-07 01:25:49,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 384. [2021-11-07 01:25:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 382 states have (on average 1.7408376963350785) internal successors, (665), 383 states have internal predecessors, (665), 0 states have call successors, (0), 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 01:25:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 665 transitions. [2021-11-07 01:25:49,806 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 665 transitions. Word has length 53 [2021-11-07 01:25:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:49,807 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 665 transitions. [2021-11-07 01:25:49,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 01:25:49,808 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 665 transitions. [2021-11-07 01:25:49,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:25:49,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:49,810 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:49,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:50,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:50,027 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:50,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1595139423, now seen corresponding path program 1 times [2021-11-07 01:25:50,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:50,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158108251] [2021-11-07 01:25:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:50,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:50,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:50,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:50,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:25:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:50,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:25:50,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:50,812 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 01:25:50,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:51,023 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 01:25:51,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:51,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158108251] [2021-11-07 01:25:51,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158108251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:51,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:51,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:25:51,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417387407] [2021-11-07 01:25:51,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:25:51,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:51,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:25:51,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:51,028 INFO L87 Difference]: Start difference. First operand 384 states and 665 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 01:25:51,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:51,113 INFO L93 Difference]: Finished difference Result 765 states and 1327 transitions. [2021-11-07 01:25:51,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:25:51,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) Word has length 54 [2021-11-07 01:25:51,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:51,117 INFO L225 Difference]: With dead ends: 765 [2021-11-07 01:25:51,117 INFO L226 Difference]: Without dead ends: 389 [2021-11-07 01:25:51,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:51,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-07 01:25:51,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 384. [2021-11-07 01:25:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 382 states have (on average 1.7329842931937174) internal successors, (662), 383 states have internal predecessors, (662), 0 states have call successors, (0), 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 01:25:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 662 transitions. [2021-11-07 01:25:51,160 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 662 transitions. Word has length 54 [2021-11-07 01:25:51,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:51,162 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 662 transitions. [2021-11-07 01:25:51,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 01:25:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 662 transitions. [2021-11-07 01:25:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:25:51,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:51,164 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:51,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:51,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:51,369 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:51,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:51,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1066492086, now seen corresponding path program 1 times [2021-11-07 01:25:51,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:51,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954823675] [2021-11-07 01:25:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:51,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:51,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:51,374 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:51,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:25:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:52,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:25:52,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:52,207 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 01:25:52,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:52,440 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 01:25:52,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:52,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954823675] [2021-11-07 01:25:52,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954823675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:52,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:52,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:25:52,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863246120] [2021-11-07 01:25:52,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:25:52,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:52,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:25:52,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:25:52,452 INFO L87 Difference]: Start difference. First operand 384 states and 662 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 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 01:25:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:52,812 INFO L93 Difference]: Finished difference Result 1444 states and 2514 transitions. [2021-11-07 01:25:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:25:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 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 55 [2021-11-07 01:25:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:52,823 INFO L225 Difference]: With dead ends: 1444 [2021-11-07 01:25:52,823 INFO L226 Difference]: Without dead ends: 1086 [2021-11-07 01:25:52,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:25:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-07 01:25:52,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 384. [2021-11-07 01:25:52,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 382 states have (on average 1.725130890052356) internal successors, (659), 383 states have internal predecessors, (659), 0 states have call successors, (0), 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 01:25:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 659 transitions. [2021-11-07 01:25:52,882 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 659 transitions. Word has length 55 [2021-11-07 01:25:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:52,882 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 659 transitions. [2021-11-07 01:25:52,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 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 01:25:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 659 transitions. [2021-11-07 01:25:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:25:52,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:52,884 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:52,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:53,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:53,103 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash -212066575, now seen corresponding path program 1 times [2021-11-07 01:25:53,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:53,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636130500] [2021-11-07 01:25:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:53,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:53,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:53,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:25:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:53,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:53,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:53,881 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 01:25:53,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:54,077 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 01:25:54,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:54,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636130500] [2021-11-07 01:25:54,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636130500] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:54,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:54,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:25:54,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779133273] [2021-11-07 01:25:54,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:25:54,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:54,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:25:54,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:54,081 INFO L87 Difference]: Start difference. First operand 384 states and 659 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:54,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:54,177 INFO L93 Difference]: Finished difference Result 886 states and 1524 transitions. [2021-11-07 01:25:54,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:25:54,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:25:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:54,185 INFO L225 Difference]: With dead ends: 886 [2021-11-07 01:25:54,185 INFO L226 Difference]: Without dead ends: 742 [2021-11-07 01:25:54,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-11-07 01:25:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 598. [2021-11-07 01:25:54,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 596 states have (on average 1.761744966442953) internal successors, (1050), 597 states have internal predecessors, (1050), 0 states have call successors, (0), 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 01:25:54,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1050 transitions. [2021-11-07 01:25:54,259 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1050 transitions. Word has length 57 [2021-11-07 01:25:54,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:54,260 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1050 transitions. [2021-11-07 01:25:54,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:54,261 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1050 transitions. [2021-11-07 01:25:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:25:54,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:54,263 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:54,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:54,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:54,477 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:54,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:54,477 INFO L85 PathProgramCache]: Analyzing trace with hash 2104147522, now seen corresponding path program 1 times [2021-11-07 01:25:54,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:54,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79306323] [2021-11-07 01:25:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:54,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:54,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:54,481 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:54,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:25:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:55,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:55,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:55,271 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 01:25:55,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:55,475 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 01:25:55,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:55,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79306323] [2021-11-07 01:25:55,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79306323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:55,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:55,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:55,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146633444] [2021-11-07 01:25:55,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:55,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:55,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:55,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:55,479 INFO L87 Difference]: Start difference. First operand 598 states and 1050 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:55,600 INFO L93 Difference]: Finished difference Result 1418 states and 2498 transitions. [2021-11-07 01:25:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:55,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:25:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:55,607 INFO L225 Difference]: With dead ends: 1418 [2021-11-07 01:25:55,608 INFO L226 Difference]: Without dead ends: 904 [2021-11-07 01:25:55,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 01:25:55,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-11-07 01:25:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 760. [2021-11-07 01:25:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 758 states have (on average 1.7730870712401055) internal successors, (1344), 759 states have internal predecessors, (1344), 0 states have call successors, (0), 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 01:25:55,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1344 transitions. [2021-11-07 01:25:55,689 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1344 transitions. Word has length 69 [2021-11-07 01:25:55,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:55,690 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 1344 transitions. [2021-11-07 01:25:55,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1344 transitions. [2021-11-07 01:25:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:25:55,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:55,693 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:55,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:55,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:55,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:55,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:55,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1606170337, now seen corresponding path program 1 times [2021-11-07 01:25:55,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:55,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321156742] [2021-11-07 01:25:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:55,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:55,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:55,915 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:55,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:25:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:56,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:56,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:56,678 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 01:25:56,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:56,873 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 01:25:56,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:56,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321156742] [2021-11-07 01:25:56,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321156742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:56,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:56,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:56,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126248683] [2021-11-07 01:25:56,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:56,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:56,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:56,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:56,882 INFO L87 Difference]: Start difference. First operand 760 states and 1344 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:57,045 INFO L93 Difference]: Finished difference Result 1936 states and 3445 transitions. [2021-11-07 01:25:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:57,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:25:57,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:57,056 INFO L225 Difference]: With dead ends: 1936 [2021-11-07 01:25:57,056 INFO L226 Difference]: Without dead ends: 1268 [2021-11-07 01:25:57,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 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 01:25:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-11-07 01:25:57,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1124. [2021-11-07 01:25:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1122 states have (on average 1.7896613190730837) internal successors, (2008), 1123 states have internal predecessors, (2008), 0 states have call successors, (0), 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 01:25:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 2008 transitions. [2021-11-07 01:25:57,162 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 2008 transitions. Word has length 70 [2021-11-07 01:25:57,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:57,162 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 2008 transitions. [2021-11-07 01:25:57,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:57,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 2008 transitions. [2021-11-07 01:25:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:25:57,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:57,166 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:57,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:57,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:57,383 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:57,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1826689008, now seen corresponding path program 1 times [2021-11-07 01:25:57,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:57,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743098188] [2021-11-07 01:25:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:57,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:57,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:57,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:57,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:25:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:57,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:57,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:58,166 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 01:25:58,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:58,346 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 01:25:58,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:58,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743098188] [2021-11-07 01:25:58,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743098188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:58,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:58,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:58,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302574647] [2021-11-07 01:25:58,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:58,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:58,349 INFO L87 Difference]: Start difference. First operand 1124 states and 2008 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:58,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:58,516 INFO L93 Difference]: Finished difference Result 3008 states and 5406 transitions. [2021-11-07 01:25:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:58,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:25:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:58,532 INFO L225 Difference]: With dead ends: 3008 [2021-11-07 01:25:58,532 INFO L226 Difference]: Without dead ends: 1984 [2021-11-07 01:25:58,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 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 01:25:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-11-07 01:25:58,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1840. [2021-11-07 01:25:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1838 states have (on average 1.8035908596300327) internal successors, (3315), 1839 states have internal predecessors, (3315), 0 states have call successors, (0), 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 01:25:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 3315 transitions. [2021-11-07 01:25:58,734 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 3315 transitions. Word has length 71 [2021-11-07 01:25:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:58,734 INFO L470 AbstractCegarLoop]: Abstraction has 1840 states and 3315 transitions. [2021-11-07 01:25:58,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:58,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 3315 transitions. [2021-11-07 01:25:58,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:25:58,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:58,747 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:58,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:58,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:58,965 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:58,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1626649232, now seen corresponding path program 1 times [2021-11-07 01:25:58,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:58,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833770754] [2021-11-07 01:25:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:58,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:58,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:58,969 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:58,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:25:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:59,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:59,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:59,844 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 01:25:59,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:00,064 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 01:26:00,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:00,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833770754] [2021-11-07 01:26:00,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833770754] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:00,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:00,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:26:00,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232863529] [2021-11-07 01:26:00,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:00,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:00,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:00,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:00,067 INFO L87 Difference]: Start difference. First operand 1840 states and 3315 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 01:26:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:00,316 INFO L93 Difference]: Finished difference Result 4892 states and 8846 transitions. [2021-11-07 01:26:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:00,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-07 01:26:00,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:00,344 INFO L225 Difference]: With dead ends: 4892 [2021-11-07 01:26:00,344 INFO L226 Difference]: Without dead ends: 3186 [2021-11-07 01:26:00,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 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 01:26:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-11-07 01:26:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 3042. [2021-11-07 01:26:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 3040 states have (on average 1.8105263157894738) internal successors, (5504), 3041 states have internal predecessors, (5504), 0 states have call successors, (0), 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 01:26:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 5504 transitions. [2021-11-07 01:26:00,652 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 5504 transitions. Word has length 72 [2021-11-07 01:26:00,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:00,652 INFO L470 AbstractCegarLoop]: Abstraction has 3042 states and 5504 transitions. [2021-11-07 01:26:00,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 01:26:00,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 5504 transitions. [2021-11-07 01:26:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:26:00,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:00,658 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:00,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:00,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:00,876 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:00,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:00,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1914963615, now seen corresponding path program 1 times [2021-11-07 01:26:00,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:00,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688873239] [2021-11-07 01:26:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:00,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:00,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:00,879 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:00,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:26:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:01,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:01,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:01,740 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 01:26:01,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:01,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:01,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688873239] [2021-11-07 01:26:01,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688873239] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:01,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:01,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:26:01,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138843529] [2021-11-07 01:26:01,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:01,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:01,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:01,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:01,991 INFO L87 Difference]: Start difference. First operand 3042 states and 5504 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:02,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:02,391 INFO L93 Difference]: Finished difference Result 8214 states and 14896 transitions. [2021-11-07 01:26:02,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:02,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:26:02,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:02,437 INFO L225 Difference]: With dead ends: 8214 [2021-11-07 01:26:02,437 INFO L226 Difference]: Without dead ends: 5340 [2021-11-07 01:26:02,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 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 01:26:02,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2021-11-07 01:26:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 5196. [2021-11-07 01:26:02,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5196 states, 5194 states have (on average 1.813053523296111) internal successors, (9417), 5195 states have internal predecessors, (9417), 0 states have call successors, (0), 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 01:26:02,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5196 states to 5196 states and 9417 transitions. [2021-11-07 01:26:02,958 INFO L78 Accepts]: Start accepts. Automaton has 5196 states and 9417 transitions. Word has length 73 [2021-11-07 01:26:02,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:02,959 INFO L470 AbstractCegarLoop]: Abstraction has 5196 states and 9417 transitions. [2021-11-07 01:26:02,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:02,959 INFO L276 IsEmpty]: Start isEmpty. Operand 5196 states and 9417 transitions. [2021-11-07 01:26:02,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:26:02,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:02,969 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:02,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:03,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:03,184 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:03,185 INFO L85 PathProgramCache]: Analyzing trace with hash -451629631, now seen corresponding path program 1 times [2021-11-07 01:26:03,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:03,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370393452] [2021-11-07 01:26:03,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:03,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:03,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:03,187 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:03,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:26:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:03,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:03,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:04,000 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 01:26:04,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:04,209 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 01:26:04,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:04,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370393452] [2021-11-07 01:26:04,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370393452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:04,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:04,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:26:04,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394949853] [2021-11-07 01:26:04,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:04,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:04,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:04,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:04,212 INFO L87 Difference]: Start difference. First operand 5196 states and 9417 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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 01:26:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:04,851 INFO L93 Difference]: Finished difference Result 15134 states and 27477 transitions. [2021-11-07 01:26:04,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:04,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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 74 [2021-11-07 01:26:04,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:04,929 INFO L225 Difference]: With dead ends: 15134 [2021-11-07 01:26:04,929 INFO L226 Difference]: Without dead ends: 10110 [2021-11-07 01:26:04,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 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 01:26:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10110 states. [2021-11-07 01:26:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10110 to 9966. [2021-11-07 01:26:05,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9964 states have (on average 1.813930148534725) internal successors, (18074), 9965 states have internal predecessors, (18074), 0 states have call successors, (0), 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 01:26:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 18074 transitions. [2021-11-07 01:26:05,823 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 18074 transitions. Word has length 74 [2021-11-07 01:26:05,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:05,824 INFO L470 AbstractCegarLoop]: Abstraction has 9966 states and 18074 transitions. [2021-11-07 01:26:05,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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 01:26:05,824 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 18074 transitions. [2021-11-07 01:26:05,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:26:05,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:05,834 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:05,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:26:06,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:06,051 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:06,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1354517905, now seen corresponding path program 1 times [2021-11-07 01:26:06,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:06,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689476678] [2021-11-07 01:26:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:06,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:06,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:06,055 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:06,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:26:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:06,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:26:06,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:06,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:07,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:07,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689476678] [2021-11-07 01:26:07,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689476678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:07,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:07,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:26:07,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094245347] [2021-11-07 01:26:07,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:26:07,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:07,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:26:07,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:26:07,174 INFO L87 Difference]: Start difference. First operand 9966 states and 18074 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:10,477 INFO L93 Difference]: Finished difference Result 24529 states and 44501 transitions. [2021-11-07 01:26:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:26:10,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:26:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:10,541 INFO L225 Difference]: With dead ends: 24529 [2021-11-07 01:26:10,541 INFO L226 Difference]: Without dead ends: 14813 [2021-11-07 01:26:10,560 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:26:10,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14813 states. [2021-11-07 01:26:11,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14813 to 9933. [2021-11-07 01:26:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9933 states, 9931 states have (on average 1.8066659953680395) internal successors, (17942), 9932 states have internal predecessors, (17942), 0 states have call successors, (0), 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 01:26:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9933 states to 9933 states and 17942 transitions. [2021-11-07 01:26:11,366 INFO L78 Accepts]: Start accepts. Automaton has 9933 states and 17942 transitions. Word has length 75 [2021-11-07 01:26:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:11,367 INFO L470 AbstractCegarLoop]: Abstraction has 9933 states and 17942 transitions. [2021-11-07 01:26:11,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 9933 states and 17942 transitions. [2021-11-07 01:26:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:26:11,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:11,380 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:11,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:11,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:11,593 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:11,593 INFO L85 PathProgramCache]: Analyzing trace with hash 80812304, now seen corresponding path program 1 times [2021-11-07 01:26:11,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:11,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508795912] [2021-11-07 01:26:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:11,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:11,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:11,597 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:11,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:26:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:12,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:12,644 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 01:26:12,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:12,863 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 01:26:12,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:12,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508795912] [2021-11-07 01:26:12,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508795912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:12,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:12,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:26:12,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854106518] [2021-11-07 01:26:12,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:12,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:12,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:12,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:12,865 INFO L87 Difference]: Start difference. First operand 9933 states and 17942 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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 01:26:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:13,853 INFO L93 Difference]: Finished difference Result 29049 states and 52535 transitions. [2021-11-07 01:26:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:13,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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) Word has length 75 [2021-11-07 01:26:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:13,917 INFO L225 Difference]: With dead ends: 29049 [2021-11-07 01:26:13,917 INFO L226 Difference]: Without dead ends: 19295 [2021-11-07 01:26:13,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 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 01:26:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19295 states. [2021-11-07 01:26:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19295 to 19151. [2021-11-07 01:26:15,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19151 states, 19149 states have (on average 1.805995091127474) internal successors, (34583), 19150 states have internal predecessors, (34583), 0 states have call successors, (0), 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 01:26:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19151 states to 19151 states and 34583 transitions. [2021-11-07 01:26:15,311 INFO L78 Accepts]: Start accepts. Automaton has 19151 states and 34583 transitions. Word has length 75 [2021-11-07 01:26:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:15,311 INFO L470 AbstractCegarLoop]: Abstraction has 19151 states and 34583 transitions. [2021-11-07 01:26:15,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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 01:26:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 19151 states and 34583 transitions. [2021-11-07 01:26:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:26:15,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:15,326 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:15,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:15,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:15,540 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:15,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:15,541 INFO L85 PathProgramCache]: Analyzing trace with hash 336600067, now seen corresponding path program 1 times [2021-11-07 01:26:15,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:15,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609713889] [2021-11-07 01:26:15,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:15,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:15,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:15,543 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:15,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:26:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:16,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:16,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:16,404 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 01:26:16,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:16,612 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 01:26:16,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:16,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609713889] [2021-11-07 01:26:16,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609713889] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:16,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:16,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:26:16,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537614194] [2021-11-07 01:26:16,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:16,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:16,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:16,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:16,615 INFO L87 Difference]: Start difference. First operand 19151 states and 34583 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:18,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:18,397 INFO L93 Difference]: Finished difference Result 56889 states and 102772 transitions. [2021-11-07 01:26:18,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:18,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:26:18,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:18,487 INFO L225 Difference]: With dead ends: 56889 [2021-11-07 01:26:18,487 INFO L226 Difference]: Without dead ends: 37921 [2021-11-07 01:26:18,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 01:26:18,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37921 states. [2021-11-07 01:26:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37921 to 37777. [2021-11-07 01:26:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37777 states, 37775 states have (on average 1.8033090668431502) internal successors, (68120), 37776 states have internal predecessors, (68120), 0 states have call successors, (0), 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 01:26:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37777 states to 37777 states and 68120 transitions. [2021-11-07 01:26:21,104 INFO L78 Accepts]: Start accepts. Automaton has 37777 states and 68120 transitions. Word has length 76 [2021-11-07 01:26:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:21,105 INFO L470 AbstractCegarLoop]: Abstraction has 37777 states and 68120 transitions. [2021-11-07 01:26:21,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 37777 states and 68120 transitions. [2021-11-07 01:26:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:26:21,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:21,118 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:21,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:21,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:21,335 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:21,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:21,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1769547305, now seen corresponding path program 1 times [2021-11-07 01:26:21,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:21,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610168905] [2021-11-07 01:26:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:21,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:21,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:21,337 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:21,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:26:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:22,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:26:22,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:22,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:22,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:22,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610168905] [2021-11-07 01:26:22,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610168905] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:22,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:22,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:26:22,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945522496] [2021-11-07 01:26:22,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:26:22,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:22,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:26:22,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:26:22,483 INFO L87 Difference]: Start difference. First operand 37777 states and 68120 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:29,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:29,238 INFO L93 Difference]: Finished difference Result 146517 states and 264048 transitions. [2021-11-07 01:26:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:26:29,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:26:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:29,522 INFO L225 Difference]: With dead ends: 146517 [2021-11-07 01:26:29,522 INFO L226 Difference]: Without dead ends: 108989 [2021-11-07 01:26:29,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:26:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108989 states. [2021-11-07 01:26:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108989 to 37519. [2021-11-07 01:26:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37519 states, 37517 states have (on average 1.7882026814510754) internal successors, (67088), 37518 states have internal predecessors, (67088), 0 states have call successors, (0), 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 01:26:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37519 states to 37519 states and 67088 transitions. [2021-11-07 01:26:32,760 INFO L78 Accepts]: Start accepts. Automaton has 37519 states and 67088 transitions. Word has length 77 [2021-11-07 01:26:32,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:32,761 INFO L470 AbstractCegarLoop]: Abstraction has 37519 states and 67088 transitions. [2021-11-07 01:26:32,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:32,761 INFO L276 IsEmpty]: Start isEmpty. Operand 37519 states and 67088 transitions. [2021-11-07 01:26:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:26:32,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:32,773 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:32,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:32,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:32,988 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:32,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2060632075, now seen corresponding path program 1 times [2021-11-07 01:26:32,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:32,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842841507] [2021-11-07 01:26:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:32,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:32,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:32,991 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:32,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:26:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:33,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:33,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:33,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:34,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:34,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842841507] [2021-11-07 01:26:34,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842841507] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:34,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:34,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:26:34,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890713503] [2021-11-07 01:26:34,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:34,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:34,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:34,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:26:34,121 INFO L87 Difference]: Start difference. First operand 37519 states and 67088 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 01:26:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:36,001 INFO L93 Difference]: Finished difference Result 74927 states and 133992 transitions. [2021-11-07 01:26:36,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:36,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 77 [2021-11-07 01:26:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:36,072 INFO L225 Difference]: With dead ends: 74927 [2021-11-07 01:26:36,073 INFO L226 Difference]: Without dead ends: 37663 [2021-11-07 01:26:36,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:26:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37663 states. [2021-11-07 01:26:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37663 to 37519. [2021-11-07 01:26:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37519 states, 37517 states have (on average 1.7847908947943598) internal successors, (66960), 37518 states have internal predecessors, (66960), 0 states have call successors, (0), 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 01:26:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37519 states to 37519 states and 66960 transitions. [2021-11-07 01:26:38,240 INFO L78 Accepts]: Start accepts. Automaton has 37519 states and 66960 transitions. Word has length 77 [2021-11-07 01:26:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:38,240 INFO L470 AbstractCegarLoop]: Abstraction has 37519 states and 66960 transitions. [2021-11-07 01:26:38,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 01:26:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 37519 states and 66960 transitions. [2021-11-07 01:26:38,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:26:38,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:38,248 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:38,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:38,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:38,464 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:38,464 INFO L85 PathProgramCache]: Analyzing trace with hash 205317346, now seen corresponding path program 1 times [2021-11-07 01:26:38,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:38,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003083040] [2021-11-07 01:26:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:38,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:38,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:38,466 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:38,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:26:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:39,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:39,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:39,327 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 01:26:39,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:39,496 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 01:26:39,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:39,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003083040] [2021-11-07 01:26:39,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003083040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:39,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:39,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:26:39,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176209891] [2021-11-07 01:26:39,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:39,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:39,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:39,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:39,498 INFO L87 Difference]: Start difference. First operand 37519 states and 66960 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:42,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:42,662 INFO L93 Difference]: Finished difference Result 104153 states and 185522 transitions. [2021-11-07 01:26:42,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:42,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:26:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:42,767 INFO L225 Difference]: With dead ends: 104153 [2021-11-07 01:26:42,767 INFO L226 Difference]: Without dead ends: 66849 [2021-11-07 01:26:42,793 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 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 01:26:42,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66849 states. [2021-11-07 01:26:46,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66849 to 66705. [2021-11-07 01:26:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66705 states, 66703 states have (on average 1.7752874683297604) internal successors, (118417), 66704 states have internal predecessors, (118417), 0 states have call successors, (0), 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 01:26:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66705 states to 66705 states and 118417 transitions. [2021-11-07 01:26:46,400 INFO L78 Accepts]: Start accepts. Automaton has 66705 states and 118417 transitions. Word has length 77 [2021-11-07 01:26:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:46,400 INFO L470 AbstractCegarLoop]: Abstraction has 66705 states and 118417 transitions. [2021-11-07 01:26:46,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 66705 states and 118417 transitions. [2021-11-07 01:26:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:26:46,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:46,413 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:46,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:46,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:46,630 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:46,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:46,630 INFO L85 PathProgramCache]: Analyzing trace with hash 375059515, now seen corresponding path program 1 times [2021-11-07 01:26:46,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:46,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819670916] [2021-11-07 01:26:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:46,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:46,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:46,632 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:46,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:26:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:47,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:26:47,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:47,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:47,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:47,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819670916] [2021-11-07 01:26:47,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819670916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:47,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [652338030] [2021-11-07 01:26:47,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:47,830 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:47,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:47,838 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:47,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e2da5b-fe56-4487-9961-a92a6ace4a23/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:26:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:48,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:26:48,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:26:49,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:26:50,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [652338030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:50,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:26:50,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:26:50,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863901285] [2021-11-07 01:26:50,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:26:50,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:50,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:26:50,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:26:50,033 INFO L87 Difference]: Start difference. First operand 66705 states and 118417 transitions. Second operand has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)