./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:36:51,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:36:51,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:36:51,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:36:51,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:36:51,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:36:51,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:36:51,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:36:51,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:36:51,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:36:51,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:36:51,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:36:51,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:36:51,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:36:51,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:36:51,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:36:51,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:36:51,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:36:51,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:36:51,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:36:51,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:36:51,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:36:51,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:36:51,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:36:51,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:36:51,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:36:51,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:36:51,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:36:51,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:36:51,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:36:51,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:36:51,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:36:51,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:36:51,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:36:51,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:36:51,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:36:51,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:36:51,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:36:51,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:36:51,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:36:51,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:36:51,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:36:51,297 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:36:51,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:36:51,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:36:51,299 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:36:51,299 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:36:51,300 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:36:51,300 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:36:51,301 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:36:51,301 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:36:51,302 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:36:51,302 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:36:51,303 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:36:51,303 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:36:51,304 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:36:51,304 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:36:51,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:36:51,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:36:51,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:36:51,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:36:51,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:36:51,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:36:51,308 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:36:51,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:36:51,308 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:36:51,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:36:51,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:36:51,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:36:51,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:36:51,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:36:51,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:36:51,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:36:51,311 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:36:51,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:36:51,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:36:51,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:36:51,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:36:51,312 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_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 [2021-11-07 01:36:51,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:36:51,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:36:51,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:36:51,639 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:36:51,640 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:36:51,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-07 01:36:51,741 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/data/d3b33fed6/e586507798f6412688bf415a7cc90e08/FLAG2997eeedb [2021-11-07 01:36:52,708 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:36:52,711 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-07 01:36:52,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/data/d3b33fed6/e586507798f6412688bf415a7cc90e08/FLAG2997eeedb [2021-11-07 01:36:53,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/data/d3b33fed6/e586507798f6412688bf415a7cc90e08 [2021-11-07 01:36:53,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:36:53,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:36:53,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:36:53,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:36:53,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:36:53,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:53" (1/1) ... [2021-11-07 01:36:53,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7467c472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:53, skipping insertion in model container [2021-11-07 01:36:53,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:53" (1/1) ... [2021-11-07 01:36:53,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:36:53,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:36:55,171 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_f372b384-1b53-459f-9632-6a280a1f6c72/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-07 01:36:55,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:36:55,257 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:36:55,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5fb3e189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:55, skipping insertion in model container [2021-11-07 01:36:55,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:36:55,269 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:36:55,272 INFO L168 Benchmark]: Toolchain (without parser) took 2100.14 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 53.1 MB in the beginning and 62.0 MB in the end (delta: -8.9 MB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:36:55,273 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 94.4 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:36:55,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2092.63 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 52.9 MB in the beginning and 62.8 MB in the end (delta: -9.9 MB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:36:55,277 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 94.4 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2092.63 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 52.9 MB in the beginning and 62.8 MB in the end (delta: -9.9 MB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5209]: 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_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:36:57,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:36:57,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:36:57,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:36:57,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:36:57,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:36:57,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:36:57,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:36:57,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:36:57,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:36:57,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:36:57,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:36:57,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:36:57,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:36:57,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:36:57,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:36:57,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:36:57,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:36:57,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:36:57,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:36:57,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:36:57,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:36:57,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:36:57,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:36:57,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:36:57,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:36:57,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:36:57,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:36:57,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:36:57,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:36:57,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:36:57,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:36:57,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:36:57,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:36:57,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:36:57,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:36:57,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:36:57,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:36:57,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:36:57,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:36:57,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:36:57,898 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:36:57,954 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:36:57,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:36:57,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:36:57,957 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:36:57,957 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:36:57,958 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:36:57,958 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:36:57,958 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:36:57,958 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:36:57,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:36:57,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:36:57,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:36:57,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:36:57,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:36:57,962 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:36:57,963 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:36:57,963 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:36:57,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:36:57,963 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:36:57,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:36:57,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:36:57,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:36:57,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:36:57,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:36:57,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:36:57,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:36:57,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:36:57,966 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:36:57,966 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:57,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:36:57,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:36:57,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:36:57,967 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_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 [2021-11-07 01:36:58,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:36:58,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:36:58,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:36:58,457 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:36:58,458 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:36:58,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-07 01:36:58,545 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/data/379d3658e/ef271a437eb54c4d9bf7308f01150871/FLAG3790425cd [2021-11-07 01:36:59,488 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:36:59,489 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-07 01:36:59,541 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/data/379d3658e/ef271a437eb54c4d9bf7308f01150871/FLAG3790425cd [2021-11-07 01:36:59,936 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/data/379d3658e/ef271a437eb54c4d9bf7308f01150871 [2021-11-07 01:36:59,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:36:59,940 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:36:59,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:36:59,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:36:59,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:36:59,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:59" (1/1) ... [2021-11-07 01:36:59,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4165dae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:59, skipping insertion in model container [2021-11-07 01:36:59,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:59" (1/1) ... [2021-11-07 01:36:59,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:37:00,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:37:02,028 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_f372b384-1b53-459f-9632-6a280a1f6c72/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-07 01:37:02,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:02,149 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:37:02,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:37:02,549 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_f372b384-1b53-459f-9632-6a280a1f6c72/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-07 01:37:02,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:02,611 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:37:03,136 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_f372b384-1b53-459f-9632-6a280a1f6c72/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-07 01:37:03,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:03,462 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:37:03,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:03 WrapperNode [2021-11-07 01:37:03,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:03,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:37:03,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:37:03,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:37:03,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:03" (1/1) ... [2021-11-07 01:37:03,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:03" (1/1) ... [2021-11-07 01:37:03,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:37:03,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:37:03,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:37:03,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:37:03,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:03" (1/1) ... [2021-11-07 01:37:03,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:03" (1/1) ... [2021-11-07 01:37:03,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:03" (1/1) ... [2021-11-07 01:37:03,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:03" (1/1) ... [2021-11-07 01:37:04,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:03" (1/1) ... [2021-11-07 01:37:04,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:03" (1/1) ... [2021-11-07 01:37:04,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:03" (1/1) ... [2021-11-07 01:37:04,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:37:04,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:37:04,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:37:04,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:37:04,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:03" (1/1) ... [2021-11-07 01:37:04,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:37:04,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:37:04,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:37:04,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:37:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:37:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:37:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:37:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:37:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:37:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:37:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:37:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:37:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:37:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:37:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:37:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:37:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:37:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:37:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:37:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:37:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:37:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:37:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:37:04,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:37:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:37:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:37:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:37:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:37:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:37:04,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:37:04,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:37:04,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:37:04,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:37:05,079 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:37:05,106 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:37:05,130 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:37:05,132 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:37:05,135 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:37:05,137 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:37:05,170 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:37:55,197 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##644: assume !false; [2021-11-07 01:37:55,198 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##643: assume false; [2021-11-07 01:37:55,198 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##320: assume false; [2021-11-07 01:37:55,198 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##321: assume !false; [2021-11-07 01:37:55,198 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##375: assume !false; [2021-11-07 01:37:55,199 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##374: assume false; [2021-11-07 01:37:55,199 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##381: assume !false; [2021-11-07 01:37:55,199 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##380: assume false; [2021-11-07 01:37:55,199 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##335: assume !false; [2021-11-07 01:37:55,199 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##334: assume false; [2021-11-07 01:37:55,200 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2021-11-07 01:37:55,200 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2021-11-07 01:37:55,200 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##164: assume !false;call ULTIMATE.dealloc(fst_ioctl_~#wrthdr~0.base, fst_ioctl_~#wrthdr~0.offset);havoc fst_ioctl_~#wrthdr~0.base, fst_ioctl_~#wrthdr~0.offset;call ULTIMATE.dealloc(fst_ioctl_~#info~0.base, fst_ioctl_~#info~0.offset);havoc fst_ioctl_~#info~0.base, fst_ioctl_~#info~0.offset; [2021-11-07 01:37:55,200 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume false; [2021-11-07 01:37:55,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:37:55,225 INFO L299 CfgBuilder]: Removed 929 assume(true) statements. [2021-11-07 01:37:55,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:55 BoogieIcfgContainer [2021-11-07 01:37:55,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:37:55,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:37:55,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:37:55,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:37:55,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:36:59" (1/3) ... [2021-11-07 01:37:55,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b28bb32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:55, skipping insertion in model container [2021-11-07 01:37:55,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:03" (2/3) ... [2021-11-07 01:37:55,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b28bb32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:55, skipping insertion in model container [2021-11-07 01:37:55,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:55" (3/3) ... [2021-11-07 01:37:55,240 INFO L111 eAbstractionObserver]: Analyzing ICFG module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-07 01:37:55,247 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:37:55,247 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-07 01:37:55,319 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:37:55,326 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:37:55,327 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-07 01:37:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 828 states, 824 states have (on average 1.3361650485436893) internal successors, (1101), 827 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:37:55,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:55,378 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:55,378 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:55,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash -113753420, now seen corresponding path program 1 times [2021-11-07 01:37:55,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:55,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578501618] [2021-11-07 01:37:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:55,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:55,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:55,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:55,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:37:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:56,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:56,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:57,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:57,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:57,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578501618] [2021-11-07 01:37:57,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578501618] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:57,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:57,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:37:57,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647565546] [2021-11-07 01:37:57,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:57,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:57,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:57,214 INFO L87 Difference]: Start difference. First operand has 828 states, 824 states have (on average 1.3361650485436893) internal successors, (1101), 827 states have internal predecessors, (1101), 0 states have call successors, (0), 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 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:57,419 INFO L93 Difference]: Finished difference Result 1654 states and 2201 transitions. [2021-11-07 01:37:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:57,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 01:37:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:57,457 INFO L225 Difference]: With dead ends: 1654 [2021-11-07 01:37:57,461 INFO L226 Difference]: Without dead ends: 827 [2021-11-07 01:37:57,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-11-07 01:37:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2021-11-07 01:37:57,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 824 states have (on average 1.3240291262135921) internal successors, (1091), 826 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1091 transitions. [2021-11-07 01:37:57,587 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1091 transitions. Word has length 12 [2021-11-07 01:37:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:57,588 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1091 transitions. [2021-11-07 01:37:57,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1091 transitions. [2021-11-07 01:37:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 01:37:57,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:57,590 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:57,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:37:57,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:57,804 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:57,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:57,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1517441348, now seen corresponding path program 1 times [2021-11-07 01:37:57,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:57,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852058434] [2021-11-07 01:37:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:57,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:57,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:57,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:57,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:37:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:59,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:37:59,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:59,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:59,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:59,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852058434] [2021-11-07 01:37:59,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852058434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:59,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1517001355] [2021-11-07 01:37:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:59,634 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:59,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:37:59,637 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:37:59,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-07 01:38:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:00,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:00,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:38:00,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:38:01,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1517001355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:01,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:01,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:38:01,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841099916] [2021-11-07 01:38:01,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:01,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:01,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:01,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:38:01,045 INFO L87 Difference]: Start difference. First operand 827 states and 1091 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:01,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:01,165 INFO L93 Difference]: Finished difference Result 2449 states and 3238 transitions. [2021-11-07 01:38:01,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:01,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 01:38:01,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:01,177 INFO L225 Difference]: With dead ends: 2449 [2021-11-07 01:38:01,177 INFO L226 Difference]: Without dead ends: 1634 [2021-11-07 01:38:01,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:38:01,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2021-11-07 01:38:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1630. [2021-11-07 01:38:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1627 states have (on average 1.322679778733866) internal successors, (2152), 1629 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2152 transitions. [2021-11-07 01:38:01,266 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2152 transitions. Word has length 16 [2021-11-07 01:38:01,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:01,267 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 2152 transitions. [2021-11-07 01:38:01,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2152 transitions. [2021-11-07 01:38:01,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:38:01,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:01,271 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:38:01,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:01,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-07 01:38:01,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:01,689 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:01,689 INFO L85 PathProgramCache]: Analyzing trace with hash 639471502, now seen corresponding path program 1 times [2021-11-07 01:38:01,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:01,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521714469] [2021-11-07 01:38:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:01,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:01,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:01,694 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:01,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:38:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:02,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:02,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:03,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:03,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:03,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521714469] [2021-11-07 01:38:03,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521714469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:03,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [750830571] [2021-11-07 01:38:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:03,491 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:03,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:03,492 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:03,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 01:38:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:04,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:38:04,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:38:04,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:38:04,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [750830571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:04,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:04,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:38:04,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327504854] [2021-11-07 01:38:04,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:38:04,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:04,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:38:04,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:38:04,702 INFO L87 Difference]: Start difference. First operand 1630 states and 2152 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:05,146 INFO L93 Difference]: Finished difference Result 5250 states and 6968 transitions. [2021-11-07 01:38:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:38:05,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 01:38:05,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:05,171 INFO L225 Difference]: With dead ends: 5250 [2021-11-07 01:38:05,172 INFO L226 Difference]: Without dead ends: 3634 [2021-11-07 01:38:05,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:38:05,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2021-11-07 01:38:05,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 1533. [2021-11-07 01:38:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1530 states have (on average 1.3261437908496732) internal successors, (2029), 1532 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2029 transitions. [2021-11-07 01:38:05,292 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2029 transitions. Word has length 31 [2021-11-07 01:38:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:05,293 INFO L470 AbstractCegarLoop]: Abstraction has 1533 states and 2029 transitions. [2021-11-07 01:38:05,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2029 transitions. [2021-11-07 01:38:05,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:38:05,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:05,307 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:38:05,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:05,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:38:05,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:05,715 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:05,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1341178206, now seen corresponding path program 1 times [2021-11-07 01:38:05,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:05,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452383417] [2021-11-07 01:38:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:05,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:05,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:05,721 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:05,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:38:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:06,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:06,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:06,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:07,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:07,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452383417] [2021-11-07 01:38:07,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452383417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:07,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1794937554] [2021-11-07 01:38:07,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:07,246 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:07,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:07,249 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:07,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:38:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:08,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:38:08,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:38:08,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:38:08,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1794937554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:08,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:08,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:38:08,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536546594] [2021-11-07 01:38:08,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:38:08,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:08,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:38:08,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:38:08,593 INFO L87 Difference]: Start difference. First operand 1533 states and 2029 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:08,949 INFO L93 Difference]: Finished difference Result 3053 states and 4045 transitions. [2021-11-07 01:38:08,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:38:08,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 01:38:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:08,966 INFO L225 Difference]: With dead ends: 3053 [2021-11-07 01:38:08,966 INFO L226 Difference]: Without dead ends: 2237 [2021-11-07 01:38:08,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:38:08,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-11-07 01:38:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 1533. [2021-11-07 01:38:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1530 states have (on average 1.3254901960784313) internal successors, (2028), 1532 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2028 transitions. [2021-11-07 01:38:09,061 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2028 transitions. Word has length 32 [2021-11-07 01:38:09,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:09,062 INFO L470 AbstractCegarLoop]: Abstraction has 1533 states and 2028 transitions. [2021-11-07 01:38:09,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:09,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2028 transitions. [2021-11-07 01:38:09,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:38:09,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:09,065 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:38:09,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:09,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:09,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:09,473 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:09,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:09,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1826872972, now seen corresponding path program 1 times [2021-11-07 01:38:09,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:09,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570525952] [2021-11-07 01:38:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:09,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:09,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:09,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:09,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:38:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:10,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:10,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:10,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:11,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:11,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570525952] [2021-11-07 01:38:11,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570525952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:11,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1753400891] [2021-11-07 01:38:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:11,142 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:11,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:11,143 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:11,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 01:38:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:12,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:12,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:13,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:13,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1753400891] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:13,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986102696] [2021-11-07 01:38:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:13,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:13,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:38:13,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:38:13,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 01:38:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:14,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:38:14,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:38:14,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:38:15,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986102696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:15,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:38:15,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-07 01:38:15,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270765462] [2021-11-07 01:38:15,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:38:15,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:15,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:38:15,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:38:15,142 INFO L87 Difference]: Start difference. First operand 1533 states and 2028 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:17,847 INFO L93 Difference]: Finished difference Result 6197 states and 8217 transitions. [2021-11-07 01:38:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:38:17,848 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 01:38:17,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:17,893 INFO L225 Difference]: With dead ends: 6197 [2021-11-07 01:38:17,893 INFO L226 Difference]: Without dead ends: 5379 [2021-11-07 01:38:17,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:38:17,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5379 states. [2021-11-07 01:38:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5379 to 4655. [2021-11-07 01:38:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4652 states have (on average 1.3269561478933791) internal successors, (6173), 4654 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 6173 transitions. [2021-11-07 01:38:18,200 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 6173 transitions. Word has length 33 [2021-11-07 01:38:18,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:18,200 INFO L470 AbstractCegarLoop]: Abstraction has 4655 states and 6173 transitions. [2021-11-07 01:38:18,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:18,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 6173 transitions. [2021-11-07 01:38:18,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:38:18,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:18,203 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:38:18,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:18,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:18,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:18,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:18,816 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1432552119, now seen corresponding path program 1 times [2021-11-07 01:38:18,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:18,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756632475] [2021-11-07 01:38:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:18,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:18,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:18,820 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:18,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:38:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:20,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:20,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:20,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:20,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:20,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756632475] [2021-11-07 01:38:20,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756632475] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:20,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [582715355] [2021-11-07 01:38:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:20,545 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:20,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:20,551 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:20,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:38:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:22,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:22,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:22,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:22,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [582715355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:22,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531312751] [2021-11-07 01:38:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:22,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:22,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:38:22,885 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:38:22,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 01:38:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:24,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:24,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:24,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:24,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531312751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:24,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:38:24,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-07 01:38:24,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306578857] [2021-11-07 01:38:24,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:38:24,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:24,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:38:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:38:24,529 INFO L87 Difference]: Start difference. First operand 4655 states and 6173 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:25,041 INFO L93 Difference]: Finished difference Result 9310 states and 12349 transitions. [2021-11-07 01:38:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:38:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 01:38:25,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:25,076 INFO L225 Difference]: With dead ends: 9310 [2021-11-07 01:38:25,076 INFO L226 Difference]: Without dead ends: 4663 [2021-11-07 01:38:25,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:38:25,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4663 states. [2021-11-07 01:38:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4663 to 4663. [2021-11-07 01:38:25,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4660 states have (on average 1.3263948497854077) internal successors, (6181), 4662 states have internal predecessors, (6181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 6181 transitions. [2021-11-07 01:38:25,341 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 6181 transitions. Word has length 37 [2021-11-07 01:38:25,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:25,344 INFO L470 AbstractCegarLoop]: Abstraction has 4663 states and 6181 transitions. [2021-11-07 01:38:25,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 6181 transitions. [2021-11-07 01:38:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:38:25,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:25,350 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:25,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:25,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:25,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:38:25,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:25,964 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash 773922983, now seen corresponding path program 2 times [2021-11-07 01:38:25,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:25,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109701123] [2021-11-07 01:38:25,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:38:25,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:25,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:25,967 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:25,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:38:27,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 01:38:27,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:38:27,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:38:27,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 01:38:27,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 01:38:28,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:28,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109701123] [2021-11-07 01:38:28,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109701123] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:28,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:28,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-07 01:38:28,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879881618] [2021-11-07 01:38:28,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:38:28,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:28,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:38:28,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:38:28,049 INFO L87 Difference]: Start difference. First operand 4663 states and 6181 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:29,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:29,402 INFO L93 Difference]: Finished difference Result 14582 states and 19341 transitions. [2021-11-07 01:38:29,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:38:29,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:38:29,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:29,470 INFO L225 Difference]: With dead ends: 14582 [2021-11-07 01:38:29,470 INFO L226 Difference]: Without dead ends: 9941 [2021-11-07 01:38:29,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:38:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9941 states. [2021-11-07 01:38:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9941 to 5240. [2021-11-07 01:38:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5240 states, 5237 states have (on average 1.3255680733244224) internal successors, (6942), 5239 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5240 states to 5240 states and 6942 transitions. [2021-11-07 01:38:30,078 INFO L78 Accepts]: Start accepts. Automaton has 5240 states and 6942 transitions. Word has length 45 [2021-11-07 01:38:30,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:30,079 INFO L470 AbstractCegarLoop]: Abstraction has 5240 states and 6942 transitions. [2021-11-07 01:38:30,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand 5240 states and 6942 transitions. [2021-11-07 01:38:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:38:30,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:30,081 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:30,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:30,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:30,307 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:30,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:30,308 INFO L85 PathProgramCache]: Analyzing trace with hash 114711330, now seen corresponding path program 1 times [2021-11-07 01:38:30,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:30,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698135726] [2021-11-07 01:38:30,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:30,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:30,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:30,311 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:30,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:38:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:31,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:38:31,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:32,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:32,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:32,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698135726] [2021-11-07 01:38:32,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698135726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:32,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [980883839] [2021-11-07 01:38:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:32,716 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:32,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:32,718 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:32,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:38:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:33,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:33,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 01:38:34,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 01:38:34,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [980883839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:34,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:34,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 9] total 18 [2021-11-07 01:38:34,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296036349] [2021-11-07 01:38:34,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:38:34,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:38:34,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:38:34,504 INFO L87 Difference]: Start difference. First operand 5240 states and 6942 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:35,319 INFO L93 Difference]: Finished difference Result 19356 states and 25791 transitions. [2021-11-07 01:38:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:38:35,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:38:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:35,369 INFO L225 Difference]: With dead ends: 19356 [2021-11-07 01:38:35,370 INFO L226 Difference]: Without dead ends: 14138 [2021-11-07 01:38:35,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:38:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14138 states. [2021-11-07 01:38:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14138 to 14130. [2021-11-07 01:38:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14130 states, 14127 states have (on average 1.3334749062079705) internal successors, (18838), 14129 states have internal predecessors, (18838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:36,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14130 states to 14130 states and 18838 transitions. [2021-11-07 01:38:36,744 INFO L78 Accepts]: Start accepts. Automaton has 14130 states and 18838 transitions. Word has length 46 [2021-11-07 01:38:36,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:36,744 INFO L470 AbstractCegarLoop]: Abstraction has 14130 states and 18838 transitions. [2021-11-07 01:38:36,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 14130 states and 18838 transitions. [2021-11-07 01:38:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:38:36,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:36,748 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:36,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:36,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:37,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:37,159 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:37,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:37,160 INFO L85 PathProgramCache]: Analyzing trace with hash -361562600, now seen corresponding path program 1 times [2021-11-07 01:38:37,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:37,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213651959] [2021-11-07 01:38:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:37,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:37,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:37,163 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:37,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:38:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:38,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:38:38,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:38,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:39,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:39,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213651959] [2021-11-07 01:38:39,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213651959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:39,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [404701815] [2021-11-07 01:38:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:39,498 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:39,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:39,511 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:39,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:38:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:41,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:38:41,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:41,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:42,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [404701815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:42,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975615236] [2021-11-07 01:38:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:42,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:42,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:38:42,227 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:38:42,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 01:38:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:43,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:38:43,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 01:38:43,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 01:38:43,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975615236] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:43,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:38:43,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 9, 9, 9] total 20 [2021-11-07 01:38:43,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963533933] [2021-11-07 01:38:43,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:38:43,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:43,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:38:44,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:38:44,000 INFO L87 Difference]: Start difference. First operand 14130 states and 18838 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:45,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:45,643 INFO L93 Difference]: Finished difference Result 24442 states and 32555 transitions. [2021-11-07 01:38:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:38:45,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:38:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:45,710 INFO L225 Difference]: With dead ends: 24442 [2021-11-07 01:38:45,710 INFO L226 Difference]: Without dead ends: 24438 [2021-11-07 01:38:45,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:38:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24438 states. [2021-11-07 01:38:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24438 to 14138. [2021-11-07 01:38:47,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14138 states, 14135 states have (on average 1.3332861690838345) internal successors, (18846), 14137 states have internal predecessors, (18846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14138 states to 14138 states and 18846 transitions. [2021-11-07 01:38:47,076 INFO L78 Accepts]: Start accepts. Automaton has 14138 states and 18846 transitions. Word has length 48 [2021-11-07 01:38:47,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:47,077 INFO L470 AbstractCegarLoop]: Abstraction has 14138 states and 18846 transitions. [2021-11-07 01:38:47,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:47,077 INFO L276 IsEmpty]: Start isEmpty. Operand 14138 states and 18846 transitions. [2021-11-07 01:38:47,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:38:47,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:47,080 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-07 01:38:47,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:47,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:47,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:47,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:38:47,695 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:47,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1882477428, now seen corresponding path program 1 times [2021-11-07 01:38:47,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:47,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489359013] [2021-11-07 01:38:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:47,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:47,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:47,700 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:47,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:38:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:49,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:38:49,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:38:49,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:38:50,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:50,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489359013] [2021-11-07 01:38:50,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489359013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:50,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1381766872] [2021-11-07 01:38:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:50,212 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:50,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:50,213 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:50,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:38:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:51,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:38:51,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 01:38:51,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 01:38:52,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1381766872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:52,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:52,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 9] total 20 [2021-11-07 01:38:52,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885686388] [2021-11-07 01:38:52,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:38:52,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:52,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:38:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:38:52,178 INFO L87 Difference]: Start difference. First operand 14138 states and 18846 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:52,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:52,691 INFO L93 Difference]: Finished difference Result 17613 states and 23463 transitions. [2021-11-07 01:38:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:38:52,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:38:52,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:52,704 INFO L225 Difference]: With dead ends: 17613 [2021-11-07 01:38:52,704 INFO L226 Difference]: Without dead ends: 3497 [2021-11-07 01:38:52,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:38:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3497 states. [2021-11-07 01:38:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3497 to 3497. [2021-11-07 01:38:53,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3495 states have (on average 1.325035765379113) internal successors, (4631), 3496 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 4631 transitions. [2021-11-07 01:38:53,120 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 4631 transitions. Word has length 52 [2021-11-07 01:38:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:53,120 INFO L470 AbstractCegarLoop]: Abstraction has 3497 states and 4631 transitions. [2021-11-07 01:38:53,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 4631 transitions. [2021-11-07 01:38:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:38:53,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:53,125 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-07 01:38:53,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-07 01:38:53,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:53,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:53,536 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:53,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:53,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1031418001, now seen corresponding path program 1 times [2021-11-07 01:38:53,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:53,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527289915] [2021-11-07 01:38:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:53,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:53,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:53,539 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:53,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:38:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:54,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:38:54,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:38:55,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:38:56,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:56,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527289915] [2021-11-07 01:38:56,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527289915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:56,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [443421030] [2021-11-07 01:38:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:56,072 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:56,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:56,073 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:56,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:38:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:57,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:57,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 01:38:57,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 01:38:58,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [443421030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:58,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:58,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9, 9] total 20 [2021-11-07 01:38:58,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909652944] [2021-11-07 01:38:58,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:38:58,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:58,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:38:58,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:38:58,250 INFO L87 Difference]: Start difference. First operand 3497 states and 4631 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:00,062 INFO L93 Difference]: Finished difference Result 16591 states and 21993 transitions. [2021-11-07 01:39:00,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:39:00,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:39:00,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:00,095 INFO L225 Difference]: With dead ends: 16591 [2021-11-07 01:39:00,095 INFO L226 Difference]: Without dead ends: 13116 [2021-11-07 01:39:00,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:39:00,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13116 states. [2021-11-07 01:39:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13116 to 3503. [2021-11-07 01:39:00,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3501 states have (on average 1.3244787203656099) internal successors, (4637), 3502 states have internal predecessors, (4637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 4637 transitions. [2021-11-07 01:39:00,620 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 4637 transitions. Word has length 59 [2021-11-07 01:39:00,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:00,620 INFO L470 AbstractCegarLoop]: Abstraction has 3503 states and 4637 transitions. [2021-11-07 01:39:00,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 4637 transitions. [2021-11-07 01:39:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:39:00,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:00,624 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-07 01:39:00,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:00,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-07 01:39:01,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:01,039 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:01,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:01,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1732482579, now seen corresponding path program 1 times [2021-11-07 01:39:01,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:01,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857149403] [2021-11-07 01:39:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:01,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:01,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:01,042 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:01,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:39:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:02,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:39:02,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:03,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:03,740 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:03,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857149403] [2021-11-07 01:39:03,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857149403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:03,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1752772340] [2021-11-07 01:39:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:03,741 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:03,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:39:03,742 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:39:03,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:39:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:06,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:39:06,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:06,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:06,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1752772340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:06,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065093898] [2021-11-07 01:39:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:06,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:06,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:06,862 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:39:06,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 01:39:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:39:08,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 01:39:08,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 01:39:08,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065093898] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:08,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:39:08,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 9, 9, 9] total 20 [2021-11-07 01:39:08,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008287152] [2021-11-07 01:39:08,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:39:08,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:08,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:39:08,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:39:08,746 INFO L87 Difference]: Start difference. First operand 3503 states and 4637 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:09,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:09,041 INFO L93 Difference]: Finished difference Result 6293 states and 8332 transitions. [2021-11-07 01:39:09,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:39:09,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:39:09,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:09,045 INFO L225 Difference]: With dead ends: 6293 [2021-11-07 01:39:09,046 INFO L226 Difference]: Without dead ends: 2802 [2021-11-07 01:39:09,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:39:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2021-11-07 01:39:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2163. [2021-11-07 01:39:09,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2161 states have (on average 1.3206848681166128) internal successors, (2854), 2162 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:09,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 2854 transitions. [2021-11-07 01:39:09,257 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 2854 transitions. Word has length 59 [2021-11-07 01:39:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:09,257 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 2854 transitions. [2021-11-07 01:39:09,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:09,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 2854 transitions. [2021-11-07 01:39:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:39:09,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:09,260 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-07 01:39:09,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:09,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:09,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:09,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:09,871 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:09,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:09,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1523610449, now seen corresponding path program 1 times [2021-11-07 01:39:09,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:09,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864369593] [2021-11-07 01:39:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:09,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:09,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:09,874 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:09,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:39:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:39:11,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:11,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:12,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:12,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864369593] [2021-11-07 01:39:12,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864369593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:12,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1817632669] [2021-11-07 01:39:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:12,621 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:12,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:39:12,622 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:39:12,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:39:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:14,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:14,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 01:39:14,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 01:39:14,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1817632669] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:14,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:39:14,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [9, 9] total 17 [2021-11-07 01:39:14,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905993258] [2021-11-07 01:39:14,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:14,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:14,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:14,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:39:14,958 INFO L87 Difference]: Start difference. First operand 2163 states and 2854 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:15,183 INFO L93 Difference]: Finished difference Result 4295 states and 5670 transitions. [2021-11-07 01:39:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:15,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:39:15,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:15,188 INFO L225 Difference]: With dead ends: 4295 [2021-11-07 01:39:15,188 INFO L226 Difference]: Without dead ends: 2154 [2021-11-07 01:39:15,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:39:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-11-07 01:39:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2154. [2021-11-07 01:39:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 2152 states have (on average 1.3178438661710037) internal successors, (2836), 2153 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 2836 transitions. [2021-11-07 01:39:15,579 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 2836 transitions. Word has length 64 [2021-11-07 01:39:15,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:15,580 INFO L470 AbstractCegarLoop]: Abstraction has 2154 states and 2836 transitions. [2021-11-07 01:39:15,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 2836 transitions. [2021-11-07 01:39:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:39:15,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:15,585 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-07 01:39:15,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:15,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:16,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:16,011 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash -785581239, now seen corresponding path program 1 times [2021-11-07 01:39:16,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:16,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964441457] [2021-11-07 01:39:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:16,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:16,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:16,015 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:16,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:39:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:17,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:39:17,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:18,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:19,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:19,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964441457] [2021-11-07 01:39:19,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964441457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:19,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [696518926] [2021-11-07 01:39:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:19,041 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:19,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:39:19,044 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:39:19,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:39:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:21,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:39:21,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:21,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:22,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [696518926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:22,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985025688] [2021-11-07 01:39:22,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:22,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:22,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:22,263 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:39:22,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 01:39:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:23,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:39:23,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:24,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:24,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985025688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:24,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:39:24,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-07 01:39:24,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6210404] [2021-11-07 01:39:24,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:39:24,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:39:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:39:24,316 INFO L87 Difference]: Start difference. First operand 2154 states and 2836 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:25,408 INFO L93 Difference]: Finished difference Result 4308 states and 5679 transitions. [2021-11-07 01:39:25,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:39:25,409 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:39:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:25,411 INFO L225 Difference]: With dead ends: 4308 [2021-11-07 01:39:25,411 INFO L226 Difference]: Without dead ends: 2170 [2021-11-07 01:39:25,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:39:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-11-07 01:39:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 2170. [2021-11-07 01:39:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2168 states have (on average 1.3154981549815499) internal successors, (2852), 2169 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 2852 transitions. [2021-11-07 01:39:25,643 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 2852 transitions. Word has length 68 [2021-11-07 01:39:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:25,644 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 2852 transitions. [2021-11-07 01:39:25,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 2852 transitions. [2021-11-07 01:39:25,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:39:25,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:25,647 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 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] [2021-11-07 01:39:25,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:25,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:26,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-07 01:39:26,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:26,275 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:26,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2096876695, now seen corresponding path program 2 times [2021-11-07 01:39:26,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:26,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349091669] [2021-11-07 01:39:26,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:39:26,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:26,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:26,279 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:26,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:40:26,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:40:26,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:40:26,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:40:26,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:40:27,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:40:29,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:29,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349091669] [2021-11-07 01:40:29,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349091669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:29,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1540694756] [2021-11-07 01:40:29,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:40:29,576 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:29,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:29,578 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:29,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 01:41:37,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:41:37,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:41:37,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:41:37,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:41:37,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:41:38,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1540694756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:38,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733578565] [2021-11-07 01:41:38,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:41:38,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:41:38,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:41:38,297 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:41:38,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 01:42:08,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:42:08,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:42:09,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:42:09,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:42:09,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:42:09,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733578565] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:09,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:42:09,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 32 [2021-11-07 01:42:09,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9874522] [2021-11-07 01:42:09,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 01:42:09,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:09,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 01:42:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:42:09,762 INFO L87 Difference]: Start difference. First operand 2170 states and 2852 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:13,867 INFO L93 Difference]: Finished difference Result 4340 states and 5719 transitions. [2021-11-07 01:42:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 01:42:13,868 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 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 84 [2021-11-07 01:42:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:13,870 INFO L225 Difference]: With dead ends: 4340 [2021-11-07 01:42:13,871 INFO L226 Difference]: Without dead ends: 2202 [2021-11-07 01:42:13,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 01:42:13,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-11-07 01:42:14,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2202. [2021-11-07 01:42:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2200 states have (on average 1.3109090909090908) internal successors, (2884), 2201 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2884 transitions. [2021-11-07 01:42:14,118 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2884 transitions. Word has length 84 [2021-11-07 01:42:14,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:14,118 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 2884 transitions. [2021-11-07 01:42:14,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2884 transitions. [2021-11-07 01:42:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 01:42:14,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:14,121 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 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] [2021-11-07 01:42:14,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:14,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-07 01:42:14,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-07 01:42:14,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:14,736 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:42:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:14,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1721099177, now seen corresponding path program 3 times [2021-11-07 01:42:14,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:14,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494715142] [2021-11-07 01:42:14,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:42:14,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:14,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:14,739 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:14,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 01:43:40,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-11-07 01:43:40,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:43:40,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 01:43:40,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:43:42,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:43:49,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:49,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494715142] [2021-11-07 01:43:49,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494715142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:49,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [786459461] [2021-11-07 01:43:49,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:43:49,102 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:49,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:43:49,103 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:43:49,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-07 01:47:49,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-11-07 01:47:49,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:49,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 01:47:49,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:50,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:51,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [786459461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:51,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325138825] [2021-11-07 01:47:51,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:47:51,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:47:51,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:47:51,699 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:47:51,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f372b384-1b53-459f-9632-6a280a1f6c72/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process