./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH --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 64bit --witnessprinter.graph.data.programhash d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:32:26,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:32:26,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:32:26,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:32:26,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:32:26,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:32:26,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:32:26,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:32:26,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:32:26,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:32:26,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:32:26,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:32:26,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:32:26,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:32:26,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:32:26,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:32:26,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:32:26,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:32:26,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:32:26,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:32:26,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:32:26,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:32:26,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:32:26,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:32:26,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:32:26,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:32:26,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:32:26,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:32:26,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:32:26,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:32:26,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:32:26,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:32:26,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:32:26,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:32:26,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:32:26,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:32:26,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:32:26,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:32:26,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:32:26,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:32:26,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:32:26,134 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 04:32:26,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:32:26,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:32:26,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:32:26,174 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:32:26,174 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:32:26,174 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:32:26,175 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:32:26,175 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:32:26,175 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:32:26,175 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:32:26,175 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:32:26,176 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:32:26,176 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:32:26,176 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:32:26,176 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:32:26,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:32:26,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:32:26,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:32:26,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:32:26,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:32:26,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:32:26,178 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:32:26,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:32:26,179 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:32:26,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:32:26,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:32:26,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:32:26,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:32:26,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:32:26,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:32:26,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:32:26,180 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:32:26,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:32:26,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:32:26,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:32:26,181 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:32:26,181 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_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 [2021-11-03 04:32:26,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:32:26,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:32:26,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:32:26,439 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:32:26,440 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:32:26,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-03 04:32:26,522 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/data/7e25a15e3/485ed52bc8014a80ac93e3af349c3017/FLAGe2e1e6352 [2021-11-03 04:32:27,222 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:32:27,222 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-03 04:32:27,279 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/data/7e25a15e3/485ed52bc8014a80ac93e3af349c3017/FLAGe2e1e6352 [2021-11-03 04:32:27,337 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/data/7e25a15e3/485ed52bc8014a80ac93e3af349c3017 [2021-11-03 04:32:27,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:32:27,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:32:27,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:32:27,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:32:27,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:32:27,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:32:27" (1/1) ... [2021-11-03 04:32:27,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@134f5e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:27, skipping insertion in model container [2021-11-03 04:32:27,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:32:27" (1/1) ... [2021-11-03 04:32:27,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:32:27,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:32:28,435 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_3ea90458-556d-4f63-921d-176303712a55/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2021-11-03 04:32:28,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:32:28,572 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) [2021-11-03 04:32:28,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@78b47db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:28, skipping insertion in model container [2021-11-03 04:32:28,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:32:28,574 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:32:28,576 INFO L168 Benchmark]: Toolchain (without parser) took 1232.53 ms. Allocated memory was 100.7 MB in the beginning and 148.9 MB in the end (delta: 48.2 MB). Free memory was 59.0 MB in the beginning and 105.6 MB in the end (delta: -46.6 MB). Peak memory consumption was 37.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:32:28,577 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 100.7 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:32:28,578 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1228.42 ms. Allocated memory was 100.7 MB in the beginning and 148.9 MB in the end (delta: 48.2 MB). Free memory was 58.8 MB in the beginning and 105.6 MB in the end (delta: -46.8 MB). Peak memory consumption was 37.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:32:28,580 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 100.7 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1228.42 ms. Allocated memory was 100.7 MB in the beginning and 148.9 MB in the end (delta: 48.2 MB). Free memory was 58.8 MB in the beginning and 105.6 MB in the end (delta: -46.8 MB). Peak memory consumption was 37.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2842]: 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_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH --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 64bit --witnessprinter.graph.data.programhash d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:32:30,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:32:30,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:32:30,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:32:30,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:32:30,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:32:30,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:32:30,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:32:30,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:32:30,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:32:30,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:32:30,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:32:30,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:32:30,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:32:30,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:32:30,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:32:30,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:32:30,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:32:30,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:32:30,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:32:30,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:32:30,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:32:30,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:32:30,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:32:30,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:32:30,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:32:30,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:32:30,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:32:30,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:32:30,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:32:30,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:32:30,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:32:30,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:32:30,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:32:30,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:32:30,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:32:30,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:32:30,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:32:30,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:32:30,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:32:30,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:32:30,839 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 04:32:30,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:32:30,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:32:30,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:32:30,883 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:32:30,883 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:32:30,883 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:32:30,884 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:32:30,884 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:32:30,884 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:32:30,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:32:30,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:32:30,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:32:30,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:32:30,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:32:30,887 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:32:30,888 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:32:30,888 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:32:30,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:32:30,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:32:30,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:32:30,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:32:30,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:32:30,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:32:30,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:32:30,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:32:30,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:32:30,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:32:30,890 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:32:30,891 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:32:30,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:32:30,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:32:30,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:32:30,891 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_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 [2021-11-03 04:32:31,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:32:31,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:32:31,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:32:31,308 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:32:31,308 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:32:31,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-03 04:32:31,379 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/data/abf77c802/4bca1e47fedc48aeafc21cfdd0786b9e/FLAG006140886 [2021-11-03 04:32:32,223 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:32:32,224 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-03 04:32:32,274 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/data/abf77c802/4bca1e47fedc48aeafc21cfdd0786b9e/FLAG006140886 [2021-11-03 04:32:32,349 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/data/abf77c802/4bca1e47fedc48aeafc21cfdd0786b9e [2021-11-03 04:32:32,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:32:32,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:32:32,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:32:32,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:32:32,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:32:32,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:32:32" (1/1) ... [2021-11-03 04:32:32,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db5e115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:32, skipping insertion in model container [2021-11-03 04:32:32,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:32:32" (1/1) ... [2021-11-03 04:32:32,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:32:32,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:32:33,668 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_3ea90458-556d-4f63-921d-176303712a55/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2021-11-03 04:32:33,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:32:33,783 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:32:33,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:32:34,037 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_3ea90458-556d-4f63-921d-176303712a55/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2021-11-03 04:32:34,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:32:34,087 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:32:34,328 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_3ea90458-556d-4f63-921d-176303712a55/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2021-11-03 04:32:34,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:32:34,501 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:32:34,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:34 WrapperNode [2021-11-03 04:32:34,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:32:34,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:32:34,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:32:34,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:32:34,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:34" (1/1) ... [2021-11-03 04:32:34,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:34" (1/1) ... [2021-11-03 04:32:35,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:32:35,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:32:35,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:32:35,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:32:35,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:34" (1/1) ... [2021-11-03 04:32:35,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:34" (1/1) ... [2021-11-03 04:32:35,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:34" (1/1) ... [2021-11-03 04:32:35,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:34" (1/1) ... [2021-11-03 04:32:35,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:34" (1/1) ... [2021-11-03 04:32:35,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:34" (1/1) ... [2021-11-03 04:32:35,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:34" (1/1) ... [2021-11-03 04:32:35,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:32:35,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:32:35,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:32:35,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:32:35,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:34" (1/1) ... [2021-11-03 04:32:35,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:32:35,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:32:35,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:32:35,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:32:35,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:32:35,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-03 04:32:35,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:32:35,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-03 04:32:35,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-03 04:32:35,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-03 04:32:35,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-03 04:32:35,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-03 04:32:35,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-03 04:32:35,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-03 04:32:35,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:32:35,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:32:35,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:32:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-03 04:32:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-03 04:32:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-03 04:32:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:32:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-03 04:32:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-03 04:32:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-03 04:32:35,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:32:35,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:32:35,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 04:32:35,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-03 04:32:35,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:32:35,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-03 04:32:35,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-03 04:32:35,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:32:35,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:34:01,492 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:34:01,492 INFO L299 CfgBuilder]: Removed 2531 assume(true) statements. [2021-11-03 04:34:01,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:34:01 BoogieIcfgContainer [2021-11-03 04:34:01,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:34:01,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:34:01,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:34:01,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:34:01,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:32:32" (1/3) ... [2021-11-03 04:34:01,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ac1b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:34:01, skipping insertion in model container [2021-11-03 04:34:01,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:32:34" (2/3) ... [2021-11-03 04:34:01,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ac1b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:34:01, skipping insertion in model container [2021-11-03 04:34:01,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:34:01" (3/3) ... [2021-11-03 04:34:01,512 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-03 04:34:01,520 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:34:01,521 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-03 04:34:01,596 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:34:01,601 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 [2021-11-03 04:34:01,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-03 04:34:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 2867 states, 2856 states have (on average 1.4334733893557423) internal successors, (4094), 2866 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:01,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-03 04:34:01,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:01,694 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:01,695 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 04:34:01,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:01,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1906996444, now seen corresponding path program 1 times [2021-11-03 04:34:01,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:01,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637118614] [2021-11-03 04:34:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:01,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:01,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:01,725 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:01,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:34:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:04,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 4082 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:34:04,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:05,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:05,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:05,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637118614] [2021-11-03 04:34:05,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637118614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:05,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:05,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:34:05,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116065204] [2021-11-03 04:34:05,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:34:05,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:05,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:34:05,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:34:05,987 INFO L87 Difference]: Start difference. First operand has 2867 states, 2856 states have (on average 1.4334733893557423) internal successors, (4094), 2866 states have internal predecessors, (4094), 0 states have call successors, (0), 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 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:06,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:06,138 INFO L93 Difference]: Finished difference Result 5730 states and 8183 transitions. [2021-11-03 04:34:06,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:34:06,140 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2021-11-03 04:34:06,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:06,175 INFO L225 Difference]: With dead ends: 5730 [2021-11-03 04:34:06,175 INFO L226 Difference]: Without dead ends: 2852 [2021-11-03 04:34:06,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:34:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-11-03 04:34:06,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2852. [2021-11-03 04:34:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2842 states have (on average 1.423997185080929) internal successors, (4047), 2851 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4047 transitions. [2021-11-03 04:34:06,371 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4047 transitions. Word has length 148 [2021-11-03 04:34:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:06,372 INFO L470 AbstractCegarLoop]: Abstraction has 2852 states and 4047 transitions. [2021-11-03 04:34:06,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:06,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4047 transitions. [2021-11-03 04:34:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-03 04:34:06,383 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:06,383 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:06,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:06,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:06,598 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 04:34:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:06,599 INFO L85 PathProgramCache]: Analyzing trace with hash 267116844, now seen corresponding path program 1 times [2021-11-03 04:34:06,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:06,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418270518] [2021-11-03 04:34:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:06,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:06,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:06,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:06,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:34:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:09,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 4082 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:34:09,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:09,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:10,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:10,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418270518] [2021-11-03 04:34:10,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418270518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:10,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:10,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:34:10,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952683798] [2021-11-03 04:34:10,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:10,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:10,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:10,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:10,635 INFO L87 Difference]: Start difference. First operand 2852 states and 4047 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:12,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:12,212 INFO L93 Difference]: Finished difference Result 5762 states and 8229 transitions. [2021-11-03 04:34:12,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:12,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-03 04:34:12,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:12,230 INFO L225 Difference]: With dead ends: 5762 [2021-11-03 04:34:12,230 INFO L226 Difference]: Without dead ends: 2930 [2021-11-03 04:34:12,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:12,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-11-03 04:34:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 2930. [2021-11-03 04:34:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2930 states, 2920 states have (on average 1.4126712328767124) internal successors, (4125), 2929 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2930 states to 2930 states and 4125 transitions. [2021-11-03 04:34:12,322 INFO L78 Accepts]: Start accepts. Automaton has 2930 states and 4125 transitions. Word has length 148 [2021-11-03 04:34:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:12,323 INFO L470 AbstractCegarLoop]: Abstraction has 2930 states and 4125 transitions. [2021-11-03 04:34:12,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2930 states and 4125 transitions. [2021-11-03 04:34:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-03 04:34:12,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:12,328 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:12,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 04:34:12,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:12,542 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 04:34:12,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:12,543 INFO L85 PathProgramCache]: Analyzing trace with hash -989185492, now seen corresponding path program 1 times [2021-11-03 04:34:12,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:12,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294009205] [2021-11-03 04:34:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:12,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:12,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:12,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:12,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:34:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 4472 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:34:15,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-03 04:34:16,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-03 04:34:18,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:18,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294009205] [2021-11-03 04:34:18,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294009205] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:18,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1558579703] [2021-11-03 04:34:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:18,023 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:34:18,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:34:18,042 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:34:18,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-03 04:34:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:20,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 4472 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:34:20,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:34:20,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:34:21,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1558579703] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:21,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:34:21,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 04:34:21,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932846025] [2021-11-03 04:34:21,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:21,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:21,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:21,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:34:21,080 INFO L87 Difference]: Start difference. First operand 2930 states and 4125 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:22,320 INFO L93 Difference]: Finished difference Result 5862 states and 8291 transitions. [2021-11-03 04:34:22,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:22,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 226 [2021-11-03 04:34:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:22,345 INFO L225 Difference]: With dead ends: 5862 [2021-11-03 04:34:22,346 INFO L226 Difference]: Without dead ends: 3146 [2021-11-03 04:34:22,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 893 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:34:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-11-03 04:34:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 3146. [2021-11-03 04:34:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3146 states, 3136 states have (on average 1.4088010204081634) internal successors, (4418), 3145 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 4418 transitions. [2021-11-03 04:34:22,457 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 4418 transitions. Word has length 226 [2021-11-03 04:34:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:22,463 INFO L470 AbstractCegarLoop]: Abstraction has 3146 states and 4418 transitions. [2021-11-03 04:34:22,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 4418 transitions. [2021-11-03 04:34:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-03 04:34:22,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:22,472 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:22,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:22,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:22,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:34:22,892 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 04:34:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:22,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1820953466, now seen corresponding path program 1 times [2021-11-03 04:34:22,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:22,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873971181] [2021-11-03 04:34:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:22,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:22,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:22,900 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:22,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:34:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:25,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 4491 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:34:25,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:34:27,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:34:28,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:28,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873971181] [2021-11-03 04:34:28,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873971181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:28,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [864559610] [2021-11-03 04:34:28,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:28,394 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:34:28,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:34:28,395 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:34:28,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-03 04:34:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:30,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 4491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:34:30,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:34:32,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:34:34,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [864559610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:34,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:34:34,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-03 04:34:34,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700873031] [2021-11-03 04:34:34,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:34,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:34,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:34,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:34:34,605 INFO L87 Difference]: Start difference. First operand 3146 states and 4418 transitions. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:34,756 INFO L93 Difference]: Finished difference Result 6078 states and 8583 transitions. [2021-11-03 04:34:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:34,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 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 238 [2021-11-03 04:34:34,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:34,776 INFO L225 Difference]: With dead ends: 6078 [2021-11-03 04:34:34,776 INFO L226 Difference]: Without dead ends: 3146 [2021-11-03 04:34:34,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 940 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:34:34,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-11-03 04:34:34,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 3146. [2021-11-03 04:34:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3146 states, 3136 states have (on average 1.4081632653061225) internal successors, (4416), 3145 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 4416 transitions. [2021-11-03 04:34:34,895 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 4416 transitions. Word has length 238 [2021-11-03 04:34:34,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:34,896 INFO L470 AbstractCegarLoop]: Abstraction has 3146 states and 4416 transitions. [2021-11-03 04:34:34,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:34,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 4416 transitions. [2021-11-03 04:34:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-03 04:34:34,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:34,901 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:34,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:35,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:35,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:35,318 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 04:34:35,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:35,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1317187882, now seen corresponding path program 1 times [2021-11-03 04:34:35,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:35,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634614928] [2021-11-03 04:34:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:35,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:35,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:35,325 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:35,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:34:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:38,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 4497 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:34:38,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:34:39,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:34:40,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:40,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634614928] [2021-11-03 04:34:40,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634614928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:40,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [496202191] [2021-11-03 04:34:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:40,929 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:34:40,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:34:40,931 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:34:40,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-03 04:34:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:43,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 4497 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:34:43,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:34:44,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:34:44,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [496202191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:44,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:34:44,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-03 04:34:44,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438765176] [2021-11-03 04:34:44,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:34:44,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:34:44,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:34:44,537 INFO L87 Difference]: Start difference. First operand 3146 states and 4416 transitions. Second operand has 6 states, 6 states have (on average 34.166666666666664) internal successors, (205), 6 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:47,165 INFO L93 Difference]: Finished difference Result 6085 states and 8588 transitions. [2021-11-03 04:34:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:34:47,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 34.166666666666664) internal successors, (205), 6 states have internal predecessors, (205), 0 states have call successors, (0), 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 240 [2021-11-03 04:34:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:47,184 INFO L225 Difference]: With dead ends: 6085 [2021-11-03 04:34:47,185 INFO L226 Difference]: Without dead ends: 3145 [2021-11-03 04:34:47,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 946 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:34:47,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2021-11-03 04:34:47,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2943. [2021-11-03 04:34:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2943 states, 2933 states have (on average 1.4118649846573474) internal successors, (4141), 2942 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 4141 transitions. [2021-11-03 04:34:47,305 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 4141 transitions. Word has length 240 [2021-11-03 04:34:47,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:47,306 INFO L470 AbstractCegarLoop]: Abstraction has 2943 states and 4141 transitions. [2021-11-03 04:34:47,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.166666666666664) internal successors, (205), 6 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:47,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 4141 transitions. [2021-11-03 04:34:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-03 04:34:47,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:47,311 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:47,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:47,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:47,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:47,725 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 04:34:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:47,726 INFO L85 PathProgramCache]: Analyzing trace with hash -849756897, now seen corresponding path program 1 times [2021-11-03 04:34:47,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:47,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786592904] [2021-11-03 04:34:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:47,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:47,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:47,730 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:47,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:34:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:51,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 4506 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:34:51,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:34:52,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:34:53,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:53,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786592904] [2021-11-03 04:34:53,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786592904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:53,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1012303147] [2021-11-03 04:34:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:53,542 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:34:53,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:34:53,543 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:34:53,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-03 04:34:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:56,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 4506 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:34:56,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:34:56,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:34:57,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1012303147] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:57,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:34:57,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 04:34:57,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191765550] [2021-11-03 04:34:57,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:57,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:57,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:57,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:34:57,240 INFO L87 Difference]: Start difference. First operand 2943 states and 4141 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:45,112 INFO L93 Difference]: Finished difference Result 8035 states and 11419 transitions. [2021-11-03 04:35:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:35:45,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 243 [2021-11-03 04:35:45,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:45,151 INFO L225 Difference]: With dead ends: 8035 [2021-11-03 04:35:45,151 INFO L226 Difference]: Without dead ends: 5306 [2021-11-03 04:35:45,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 968 GetRequests, 961 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:35:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5306 states. [2021-11-03 04:35:45,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5306 to 4416. [2021-11-03 04:35:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4416 states, 4406 states have (on average 1.4289605083976396) internal successors, (6296), 4415 states have internal predecessors, (6296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4416 states to 4416 states and 6296 transitions. [2021-11-03 04:35:45,379 INFO L78 Accepts]: Start accepts. Automaton has 4416 states and 6296 transitions. Word has length 243 [2021-11-03 04:35:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:45,379 INFO L470 AbstractCegarLoop]: Abstraction has 4416 states and 6296 transitions. [2021-11-03 04:35:45,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4416 states and 6296 transitions. [2021-11-03 04:35:45,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-03 04:35:45,383 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:45,384 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:45,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:45,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-11-03 04:35:45,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:35:45,806 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 04:35:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:45,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1483892262, now seen corresponding path program 1 times [2021-11-03 04:35:45,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:35:45,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419289507] [2021-11-03 04:35:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:45,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:35:45,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:35:45,813 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:35:45,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:35:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:49,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 4508 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:35:49,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:35:50,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:35:52,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:35:52,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419289507] [2021-11-03 04:35:52,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419289507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:35:52,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1109599279] [2021-11-03 04:35:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:52,035 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:35:52,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:35:52,036 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:35:52,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-03 04:35:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:54,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 4508 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:35:54,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:35:55,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:35:56,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1109599279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:56,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:35:56,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-03 04:35:56,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184319279] [2021-11-03 04:35:56,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:35:56,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:35:56,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:35:56,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:35:56,002 INFO L87 Difference]: Start difference. First operand 4416 states and 6296 transitions. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:56,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:56,178 INFO L93 Difference]: Finished difference Result 8619 states and 12339 transitions. [2021-11-03 04:35:56,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:35:56,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 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 245 [2021-11-03 04:35:56,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:56,203 INFO L225 Difference]: With dead ends: 8619 [2021-11-03 04:35:56,204 INFO L226 Difference]: Without dead ends: 4395 [2021-11-03 04:35:56,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 977 GetRequests, 968 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:35:56,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4395 states. [2021-11-03 04:35:56,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4395 to 4395. [2021-11-03 04:35:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4395 states, 4385 states have (on average 1.4280501710376283) internal successors, (6262), 4394 states have internal predecessors, (6262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4395 states to 4395 states and 6262 transitions. [2021-11-03 04:35:56,468 INFO L78 Accepts]: Start accepts. Automaton has 4395 states and 6262 transitions. Word has length 245 [2021-11-03 04:35:56,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:56,469 INFO L470 AbstractCegarLoop]: Abstraction has 4395 states and 6262 transitions. [2021-11-03 04:35:56,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:56,470 INFO L276 IsEmpty]: Start isEmpty. Operand 4395 states and 6262 transitions. [2021-11-03 04:35:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-03 04:35:56,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:56,475 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:56,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:56,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:56,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:35:56,897 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 04:35:56,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1273119426, now seen corresponding path program 1 times [2021-11-03 04:35:56,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:35:56,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662597093] [2021-11-03 04:35:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:56,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:35:56,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:35:56,902 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:35:56,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:36:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:00,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 4677 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:36:00,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:36:02,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:36:03,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:36:03,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662597093] [2021-11-03 04:36:03,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662597093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:36:03,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1311840839] [2021-11-03 04:36:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:03,738 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:36:03,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:36:03,740 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:36:03,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-03 04:36:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:07,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 4677 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:36:07,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:36:08,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:36:10,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1311840839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:10,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:36:10,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-03 04:36:10,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682407184] [2021-11-03 04:36:10,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 04:36:10,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:36:10,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 04:36:10,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:36:10,464 INFO L87 Difference]: Start difference. First operand 4395 states and 6262 transitions. Second operand has 12 states, 12 states have (on average 24.416666666666668) internal successors, (293), 12 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:18,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:37:18,782 INFO L93 Difference]: Finished difference Result 12771 states and 18297 transitions. [2021-11-03 04:37:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:37:18,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 24.416666666666668) internal successors, (293), 12 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2021-11-03 04:37:18,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:37:18,818 INFO L225 Difference]: With dead ends: 12771 [2021-11-03 04:37:18,818 INFO L226 Difference]: Without dead ends: 8581 [2021-11-03 04:37:18,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1152 GetRequests, 1128 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-11-03 04:37:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8581 states. [2021-11-03 04:37:19,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8581 to 4395. [2021-11-03 04:37:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4395 states, 4385 states have (on average 1.4278221208665907) internal successors, (6261), 4394 states have internal predecessors, (6261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4395 states to 4395 states and 6261 transitions. [2021-11-03 04:37:19,087 INFO L78 Accepts]: Start accepts. Automaton has 4395 states and 6261 transitions. Word has length 287 [2021-11-03 04:37:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:37:19,087 INFO L470 AbstractCegarLoop]: Abstraction has 4395 states and 6261 transitions. [2021-11-03 04:37:19,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.416666666666668) internal successors, (293), 12 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 4395 states and 6261 transitions. [2021-11-03 04:37:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-03 04:37:19,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:37:19,093 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:37:19,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:19,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:19,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:37:19,517 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 04:37:19,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:37:19,518 INFO L85 PathProgramCache]: Analyzing trace with hash -424817894, now seen corresponding path program 1 times [2021-11-03 04:37:19,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:37:19,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023757342] [2021-11-03 04:37:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:37:19,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:37:19,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:37:19,522 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:37:19,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:37:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:37:23,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 4688 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:37:23,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:37:25,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:37:26,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:37:26,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023757342] [2021-11-03 04:37:26,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023757342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:37:26,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [354972722] [2021-11-03 04:37:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:37:26,737 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:37:26,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:37:26,741 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:37:26,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 04:37:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:37:30,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 4688 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:37:30,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:37:31,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:37:32,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [354972722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:37:32,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:37:32,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-03 04:37:32,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985610364] [2021-11-03 04:37:32,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:37:32,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:37:32,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:37:32,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-03 04:37:32,452 INFO L87 Difference]: Start difference. First operand 4395 states and 6261 transitions. Second operand has 8 states, 8 states have (on average 31.75) internal successors, (254), 8 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:37:33,217 INFO L93 Difference]: Finished difference Result 12696 states and 18195 transitions. [2021-11-03 04:37:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:37:33,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 31.75) internal successors, (254), 8 states have internal predecessors, (254), 0 states have call successors, (0), 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 289 [2021-11-03 04:37:33,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:37:33,245 INFO L225 Difference]: With dead ends: 12696 [2021-11-03 04:37:33,245 INFO L226 Difference]: Without dead ends: 8512 [2021-11-03 04:37:33,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1155 GetRequests, 1141 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:37:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8512 states. [2021-11-03 04:37:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8512 to 4395. [2021-11-03 04:37:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4395 states, 4385 states have (on average 1.427594070695553) internal successors, (6260), 4394 states have internal predecessors, (6260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4395 states to 4395 states and 6260 transitions. [2021-11-03 04:37:33,639 INFO L78 Accepts]: Start accepts. Automaton has 4395 states and 6260 transitions. Word has length 289 [2021-11-03 04:37:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:37:33,640 INFO L470 AbstractCegarLoop]: Abstraction has 4395 states and 6260 transitions. [2021-11-03 04:37:33,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.75) internal successors, (254), 8 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 4395 states and 6260 transitions. [2021-11-03 04:37:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-03 04:37:33,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:37:33,643 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:37:33,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:33,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-03 04:37:34,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:37:34,057 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 04:37:34,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:37:34,058 INFO L85 PathProgramCache]: Analyzing trace with hash 115806974, now seen corresponding path program 1 times [2021-11-03 04:37:34,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:37:34,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203496548] [2021-11-03 04:37:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:37:34,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:37:34,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:37:34,063 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:37:34,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:37:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:37:38,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 4699 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:37:38,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:37:39,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:37:41,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:37:41,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203496548] [2021-11-03 04:37:41,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203496548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:37:41,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55880585] [2021-11-03 04:37:41,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:37:41,723 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:37:41,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:37:41,724 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:37:41,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-03 04:37:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:37:50,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 4699 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:37:50,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:37:51,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:37:53,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [55880585] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:37:53,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105727739] [2021-11-03 04:37:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:37:53,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:37:53,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:37:53,233 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:37:53,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-03 04:38:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:04,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 4699 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:38:04,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-03 04:38:04,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-03 04:38:05,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105727739] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:38:05,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 04:38:05,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-03 04:38:05,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352411343] [2021-11-03 04:38:05,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:38:05,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:38:05,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:38:05,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:38:05,381 INFO L87 Difference]: Start difference. First operand 4395 states and 6260 transitions. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:38:06,113 INFO L93 Difference]: Finished difference Result 12221 states and 17546 transitions. [2021-11-03 04:38:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:38:06,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 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 291 [2021-11-03 04:38:06,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:38:06,143 INFO L225 Difference]: With dead ends: 12221 [2021-11-03 04:38:06,143 INFO L226 Difference]: Without dead ends: 12205 [2021-11-03 04:38:06,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1740 GetRequests, 1732 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:38:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12205 states. [2021-11-03 04:38:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12205 to 4379. [2021-11-03 04:38:06,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 4377 states have (on average 1.4247201279415125) internal successors, (6236), 4378 states have internal predecessors, (6236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 6236 transitions. [2021-11-03 04:38:06,526 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 6236 transitions. Word has length 291 [2021-11-03 04:38:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:38:06,527 INFO L470 AbstractCegarLoop]: Abstraction has 4379 states and 6236 transitions. [2021-11-03 04:38:06,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:06,528 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 6236 transitions. [2021-11-03 04:38:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-03 04:38:06,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:38:06,532 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:38:06,753 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forcibly destroying the process [2021-11-03 04:38:06,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:38:06,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-03 04:38:06,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-03 04:38:07,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:38:07,161 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 04:38:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:38:07,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1607260706, now seen corresponding path program 1 times [2021-11-03 04:38:07,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:38:07,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837762892] [2021-11-03 04:38:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:07,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:38:07,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:38:07,166 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:38:07,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:38:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:11,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 4720 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:38:11,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:38:13,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:38:15,259 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:38:15,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837762892] [2021-11-03 04:38:15,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837762892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:38:15,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [320741612] [2021-11-03 04:38:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:15,259 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:38:15,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:38:15,261 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:38:15,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-03 04:38:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:24,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 4720 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:38:24,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:38:25,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-03 04:38:27,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [320741612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:38:27,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904165459] [2021-11-03 04:38:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:27,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:38:27,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:38:27,372 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:38:27,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-03 04:38:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:39,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 4720 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:38:39,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:38:39,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:38:40,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904165459] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:38:40,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 04:38:40,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-03 04:38:40,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437889963] [2021-11-03 04:38:40,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:38:40,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:38:40,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:38:40,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:38:40,567 INFO L87 Difference]: Start difference. First operand 4379 states and 6236 transitions. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:40,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:38:40,857 INFO L93 Difference]: Finished difference Result 8559 states and 12240 transitions. [2021-11-03 04:38:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:38:40,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 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 300 [2021-11-03 04:38:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:38:40,867 INFO L225 Difference]: With dead ends: 8559 [2021-11-03 04:38:40,868 INFO L226 Difference]: Without dead ends: 4394 [2021-11-03 04:38:40,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1794 GetRequests, 1786 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:38:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2021-11-03 04:38:41,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 4394. [2021-11-03 04:38:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4394 states, 4392 states have (on average 1.4241803278688525) internal successors, (6255), 4393 states have internal predecessors, (6255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4394 states to 4394 states and 6255 transitions. [2021-11-03 04:38:41,237 INFO L78 Accepts]: Start accepts. Automaton has 4394 states and 6255 transitions. Word has length 300 [2021-11-03 04:38:41,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:38:41,238 INFO L470 AbstractCegarLoop]: Abstraction has 4394 states and 6255 transitions. [2021-11-03 04:38:41,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4394 states and 6255 transitions. [2021-11-03 04:38:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-03 04:38:41,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:38:41,242 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:38:41,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:38:41,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:38:41,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:38:41,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:38:41,858 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 04:38:41,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:38:41,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1484027250, now seen corresponding path program 1 times [2021-11-03 04:38:41,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:38:41,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608561385] [2021-11-03 04:38:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:41,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:38:41,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:38:41,863 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:38:41,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:38:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:46,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 4768 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:38:46,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-03 04:38:48,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-03 04:38:50,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:38:50,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608561385] [2021-11-03 04:38:50,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608561385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:38:50,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [494475615] [2021-11-03 04:38:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:50,186 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:38:50,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:38:50,196 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:38:50,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-03 04:39:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:00,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 4768 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:39:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-03 04:39:01,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-03 04:39:03,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [494475615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:39:03,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705026226] [2021-11-03 04:39:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:03,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:39:03,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:39:03,150 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:39:03,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-03 04:39:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:20,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 4768 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:39:20,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:39:21,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-03 04:39:22,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705026226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:39:22,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:39:22,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-03 04:39:22,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815425052] [2021-11-03 04:39:22,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-03 04:39:22,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:22,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-03 04:39:22,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-03 04:39:22,075 INFO L87 Difference]: Start difference. First operand 4394 states and 6255 transitions. Second operand has 14 states, 14 states have (on average 36.214285714285715) internal successors, (507), 14 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:29,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:29,666 INFO L93 Difference]: Finished difference Result 8900 states and 12719 transitions. [2021-11-03 04:39:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:39:29,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 36.214285714285715) internal successors, (507), 14 states have internal predecessors, (507), 0 states have call successors, (0), 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 316 [2021-11-03 04:39:29,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:29,674 INFO L225 Difference]: With dead ends: 8900 [2021-11-03 04:39:29,674 INFO L226 Difference]: Without dead ends: 4528 [2021-11-03 04:39:29,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1892 GetRequests, 1878 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:39:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2021-11-03 04:39:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 4528. [2021-11-03 04:39:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4528 states, 4526 states have (on average 1.4151568714096332) internal successors, (6405), 4527 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 6405 transitions. [2021-11-03 04:39:29,949 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 6405 transitions. Word has length 316 [2021-11-03 04:39:29,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:29,950 INFO L470 AbstractCegarLoop]: Abstraction has 4528 states and 6405 transitions. [2021-11-03 04:39:29,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 36.214285714285715) internal successors, (507), 14 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 6405 transitions. [2021-11-03 04:39:29,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-11-03 04:39:29,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:29,955 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:39:29,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:30,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:30,570 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forcibly destroying the process [2021-11-03 04:39:30,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:30,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:39:30,575 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 04:39:30,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:30,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1727585006, now seen corresponding path program 2 times [2021-11-03 04:39:30,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:30,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737000919] [2021-11-03 04:39:30,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:39:30,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:30,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:30,580 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:30,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-03 04:40:59,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:40:59,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:40:59,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 5254 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:40:59,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:41:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-03 04:41:01,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:41:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-03 04:41:02,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:41:02,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737000919] [2021-11-03 04:41:02,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737000919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:41:02,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [962100184] [2021-11-03 04:41:02,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:41:02,804 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:41:02,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:41:02,805 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:41:02,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-03 04:44:32,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:44:32,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:44:33,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 5254 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:44:33,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-03 04:44:34,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:44:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-03 04:44:35,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [962100184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:44:35,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179022099] [2021-11-03 04:44:35,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:44:35,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:44:35,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:44:35,438 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:44:35,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ea90458-556d-4f63-921d-176303712a55/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process