./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45558e1c10008e5b16efe572a84fcf92b08797f54d586c51d45827b7e38254a6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:53:59,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:53:59,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:53:59,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:53:59,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:53:59,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:53:59,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:53:59,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:53:59,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:53:59,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:53:59,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:53:59,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:53:59,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:53:59,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:53:59,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:53:59,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:53:59,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:53:59,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:53:59,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:53:59,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:53:59,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:53:59,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:53:59,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:53:59,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:53:59,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:53:59,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:53:59,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:53:59,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:53:59,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:53:59,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:53:59,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:53:59,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:53:59,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:53:59,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:53:59,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:53:59,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:53:59,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:53:59,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:53:59,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:53:59,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:53:59,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:53:59,236 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:53:59,282 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:53:59,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:53:59,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:53:59,294 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:53:59,294 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:53:59,295 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:53:59,295 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:53:59,295 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:53:59,295 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:53:59,296 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:53:59,297 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:53:59,297 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:53:59,297 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:53:59,298 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:53:59,298 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:53:59,298 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:53:59,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:53:59,299 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:53:59,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:53:59,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:53:59,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:53:59,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:53:59,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:53:59,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:53:59,301 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:53:59,301 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:53:59,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:53:59,301 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:53:59,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:53:59,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:53:59,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:53:59,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:53:59,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:53:59,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:53:59,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:53:59,303 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:53:59,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:53:59,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:53:59,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:53:59,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:53:59,305 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_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45558e1c10008e5b16efe572a84fcf92b08797f54d586c51d45827b7e38254a6 [2021-11-12 23:53:59,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:53:59,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:53:59,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:53:59,624 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:53:59,625 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:53:59,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c [2021-11-12 23:53:59,704 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/data/98a38e948/388dcf25a2794491a60c796d1d4976fb/FLAG787d5f6c3 [2021-11-12 23:54:00,254 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:54:00,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c [2021-11-12 23:54:00,270 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/data/98a38e948/388dcf25a2794491a60c796d1d4976fb/FLAG787d5f6c3 [2021-11-12 23:54:00,576 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/data/98a38e948/388dcf25a2794491a60c796d1d4976fb [2021-11-12 23:54:00,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:54:00,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:54:00,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:54:00,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:54:00,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:54:00,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:54:00" (1/1) ... [2021-11-12 23:54:00,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@171d9824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:00, skipping insertion in model container [2021-11-12 23:54:00,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:54:00" (1/1) ... [2021-11-12 23:54:00,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:54:00,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:54:00,925 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_f89e6381-ead5-4b15-a265-39106848129b/sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c[9333,9346] [2021-11-12 23:54:00,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:54:01,001 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) [2021-11-12 23:54:01,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@51ae32d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:01, skipping insertion in model container [2021-11-12 23:54:01,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:54:01,003 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:54:01,005 INFO L158 Benchmark]: Toolchain (without parser) took 423.42ms. Allocated memory is still 98.6MB. Free memory was 56.9MB in the beginning and 71.5MB in the end (delta: -14.5MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-11-12 23:54:01,006 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 98.6MB. Free memory is still 75.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:54:01,007 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.44ms. Allocated memory is still 98.6MB. Free memory was 56.7MB in the beginning and 71.5MB in the end (delta: -14.8MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-11-12 23:54:01,009 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 98.6MB. Free memory is still 75.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 420.44ms. Allocated memory is still 98.6MB. Free memory was 56.7MB in the beginning and 71.5MB in the end (delta: -14.8MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 645]: 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_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45558e1c10008e5b16efe572a84fcf92b08797f54d586c51d45827b7e38254a6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:54:03,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:54:03,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:54:03,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:54:03,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:54:03,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:54:03,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:54:03,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:54:03,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:54:03,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:54:03,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:54:03,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:54:03,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:54:03,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:54:03,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:54:03,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:54:03,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:54:03,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:54:03,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:54:03,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:54:03,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:54:03,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:54:03,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:54:03,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:54:03,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:54:03,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:54:03,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:54:03,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:54:03,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:54:03,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:54:03,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:54:03,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:54:03,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:54:03,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:54:03,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:54:03,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:54:03,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:54:03,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:54:03,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:54:03,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:54:03,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:54:03,484 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:54:03,510 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:54:03,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:54:03,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:54:03,516 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:54:03,516 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:54:03,519 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:54:03,519 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:54:03,519 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:54:03,519 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:54:03,520 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:54:03,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:54:03,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:54:03,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:54:03,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:54:03,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:54:03,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:54:03,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:54:03,523 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:54:03,524 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:54:03,524 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:54:03,524 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:54:03,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:54:03,525 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:54:03,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:54:03,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:54:03,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:54:03,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:54:03,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:54:03,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:54:03,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:54:03,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:54:03,527 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:54:03,527 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:54:03,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:54:03,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:54:03,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:54:03,528 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_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45558e1c10008e5b16efe572a84fcf92b08797f54d586c51d45827b7e38254a6 [2021-11-12 23:54:03,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:54:03,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:54:03,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:54:03,924 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:54:03,925 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:54:03,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c [2021-11-12 23:54:04,003 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/data/c180d284b/f27206798f3142e9a689624a07b0d415/FLAG246af869d [2021-11-12 23:54:04,554 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:54:04,554 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c [2021-11-12 23:54:04,569 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/data/c180d284b/f27206798f3142e9a689624a07b0d415/FLAG246af869d [2021-11-12 23:54:04,855 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/data/c180d284b/f27206798f3142e9a689624a07b0d415 [2021-11-12 23:54:04,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:54:04,859 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:54:04,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:54:04,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:54:04,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:54:04,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:54:04" (1/1) ... [2021-11-12 23:54:04,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff494f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:04, skipping insertion in model container [2021-11-12 23:54:04,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:54:04" (1/1) ... [2021-11-12 23:54:04,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:54:04,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:54:05,343 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_f89e6381-ead5-4b15-a265-39106848129b/sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c[9333,9346] [2021-11-12 23:54:05,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:54:05,501 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:54:05,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:54:05,576 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_f89e6381-ead5-4b15-a265-39106848129b/sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c[9333,9346] [2021-11-12 23:54:05,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:54:05,668 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:54:05,724 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_f89e6381-ead5-4b15-a265-39106848129b/sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c[9333,9346] [2021-11-12 23:54:05,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:54:05,797 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:54:05,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:05 WrapperNode [2021-11-12 23:54:05,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:54:05,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:54:05,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:54:05,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:54:05,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:05" (1/1) ... [2021-11-12 23:54:05,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:05" (1/1) ... [2021-11-12 23:54:05,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:54:05,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:54:05,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:54:05,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:54:05,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:05" (1/1) ... [2021-11-12 23:54:05,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:05" (1/1) ... [2021-11-12 23:54:05,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:05" (1/1) ... [2021-11-12 23:54:05,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:05" (1/1) ... [2021-11-12 23:54:05,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:05" (1/1) ... [2021-11-12 23:54:05,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:05" (1/1) ... [2021-11-12 23:54:05,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:05" (1/1) ... [2021-11-12 23:54:05,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:54:05,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:54:05,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:54:05,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:54:05,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:05" (1/1) ... [2021-11-12 23:54:05,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:54:05,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:54:05,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:54:05,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:54:05,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:54:06,000 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2021-11-12 23:54:06,000 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2021-11-12 23:54:06,000 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:54:06,000 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:54:06,001 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:54:06,001 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:54:06,001 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2021-11-12 23:54:06,001 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2021-11-12 23:54:06,001 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2021-11-12 23:54:06,002 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2021-11-12 23:54:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2021-11-12 23:54:06,002 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2021-11-12 23:54:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:54:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2021-11-12 23:54:06,003 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2021-11-12 23:54:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2021-11-12 23:54:06,003 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2021-11-12 23:54:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2021-11-12 23:54:06,003 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2021-11-12 23:54:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-12 23:54:06,004 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-12 23:54:06,004 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2021-11-12 23:54:06,004 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2021-11-12 23:54:06,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:54:06,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:54:08,547 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:54:08,548 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:54:08,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:54:08 BoogieIcfgContainer [2021-11-12 23:54:08,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:54:08,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:54:08,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:54:08,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:54:08,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:54:04" (1/3) ... [2021-11-12 23:54:08,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c46d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:54:08, skipping insertion in model container [2021-11-12 23:54:08,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:54:05" (2/3) ... [2021-11-12 23:54:08,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c46d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:54:08, skipping insertion in model container [2021-11-12 23:54:08,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:54:08" (3/3) ... [2021-11-12 23:54:08,562 INFO L111 eAbstractionObserver]: Analyzing ICFG minepump_spec4_productSimulator.cil.c [2021-11-12 23:54:08,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:54:08,568 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:54:08,628 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:54:08,635 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 [2021-11-12 23:54:08,636 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:54:08,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 97 states have (on average 1.3711340206185567) internal successors, (133), 113 states have internal predecessors, (133), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-12 23:54:08,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 23:54:08,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:08,666 INFO L514 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, 1] [2021-11-12 23:54:08,667 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1286926384, now seen corresponding path program 1 times [2021-11-12 23:54:08,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:08,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263156576] [2021-11-12 23:54:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:08,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:08,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:08,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:08,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:54:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:08,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:54:08,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:09,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:09,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:09,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263156576] [2021-11-12 23:54:09,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263156576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:09,210 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:09,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:54:09,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990113534] [2021-11-12 23:54:09,212 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:09,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:54:09,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:09,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:54:09,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:54:09,246 INFO L87 Difference]: Start difference. First operand has 138 states, 97 states have (on average 1.3711340206185567) internal successors, (133), 113 states have internal predecessors, (133), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-12 23:54:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:09,289 INFO L93 Difference]: Finished difference Result 253 states and 353 transitions. [2021-11-12 23:54:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:54:09,291 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 49 [2021-11-12 23:54:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:09,302 INFO L225 Difference]: With dead ends: 253 [2021-11-12 23:54:09,302 INFO L226 Difference]: Without dead ends: 129 [2021-11-12 23:54:09,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:54:09,311 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.10ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:09,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 4.10ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:54:09,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-12 23:54:09,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-12 23:54:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 90 states have (on average 1.3222222222222222) internal successors, (119), 105 states have internal predecessors, (119), 28 states have call successors, (28), 11 states have call predecessors, (28), 10 states have return successors, (27), 22 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-12 23:54:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2021-11-12 23:54:09,380 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 49 [2021-11-12 23:54:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:09,382 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2021-11-12 23:54:09,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-12 23:54:09,382 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2021-11-12 23:54:09,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-12 23:54:09,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:09,386 INFO L514 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, 1, 1] [2021-11-12 23:54:09,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:09,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:09,590 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:09,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1245192373, now seen corresponding path program 1 times [2021-11-12 23:54:09,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:09,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699305594] [2021-11-12 23:54:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:09,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:09,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:09,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:09,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:54:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:09,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:54:09,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:09,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:10,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:10,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699305594] [2021-11-12 23:54:10,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699305594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:10,108 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:10,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:54:10,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38585803] [2021-11-12 23:54:10,108 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:10,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:54:10,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:10,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:54:10,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:54:10,111 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-12 23:54:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:10,140 INFO L93 Difference]: Finished difference Result 202 states and 273 transitions. [2021-11-12 23:54:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:54:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2021-11-12 23:54:10,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:10,144 INFO L225 Difference]: With dead ends: 202 [2021-11-12 23:54:10,144 INFO L226 Difference]: Without dead ends: 120 [2021-11-12 23:54:10,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:54:10,147 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 21 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.55ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:10,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 431 Invalid, 1 Unknown, 0 Unchecked, 4.55ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 1.59ms Time] [2021-11-12 23:54:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-12 23:54:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-11-12 23:54:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 84 states have (on average 1.3333333333333333) internal successors, (112), 99 states have internal predecessors, (112), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (25), 20 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-12 23:54:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 162 transitions. [2021-11-12 23:54:10,166 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 162 transitions. Word has length 50 [2021-11-12 23:54:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:10,167 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 162 transitions. [2021-11-12 23:54:10,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-12 23:54:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 162 transitions. [2021-11-12 23:54:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-12 23:54:10,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:10,170 INFO L514 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:10,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:10,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:10,383 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:10,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:10,383 INFO L85 PathProgramCache]: Analyzing trace with hash -327824829, now seen corresponding path program 1 times [2021-11-12 23:54:10,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:10,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617260385] [2021-11-12 23:54:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:10,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:10,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:10,386 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:10,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:54:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:10,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:54:10,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:10,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:10,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:10,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617260385] [2021-11-12 23:54:10,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617260385] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:10,997 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:10,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 23:54:10,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333096351] [2021-11-12 23:54:10,998 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:10,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:54:10,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:10,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:54:10,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:54:11,000 INFO L87 Difference]: Start difference. First operand 120 states and 162 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:54:11,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:11,212 INFO L93 Difference]: Finished difference Result 354 states and 486 transitions. [2021-11-12 23:54:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:54:11,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 55 [2021-11-12 23:54:11,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:11,221 INFO L225 Difference]: With dead ends: 354 [2021-11-12 23:54:11,222 INFO L226 Difference]: Without dead ends: 256 [2021-11-12 23:54:11,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:54:11,224 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 324 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.65ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:11,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 336 Invalid, 92 Unknown, 0 Unchecked, 5.65ms Time], IncrementalHoareTripleChecker [48 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 166.24ms Time] [2021-11-12 23:54:11,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-12 23:54:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 250. [2021-11-12 23:54:11,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 178 states have (on average 1.3820224719101124) internal successors, (246), 210 states have internal predecessors, (246), 48 states have call successors, (48), 23 states have call predecessors, (48), 23 states have return successors, (49), 36 states have call predecessors, (49), 48 states have call successors, (49) [2021-11-12 23:54:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 343 transitions. [2021-11-12 23:54:11,272 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 343 transitions. Word has length 55 [2021-11-12 23:54:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:11,273 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 343 transitions. [2021-11-12 23:54:11,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:54:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 343 transitions. [2021-11-12 23:54:11,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:54:11,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:11,277 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:11,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 23:54:11,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:11,492 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:11,493 INFO L85 PathProgramCache]: Analyzing trace with hash -435041523, now seen corresponding path program 1 times [2021-11-12 23:54:11,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:11,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350605077] [2021-11-12 23:54:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:11,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:11,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:11,495 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:11,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:54:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:11,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:54:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:11,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:12,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:12,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350605077] [2021-11-12 23:54:12,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350605077] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:12,126 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:12,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-12 23:54:12,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135873617] [2021-11-12 23:54:12,127 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:12,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:54:12,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:12,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:54:12,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:54:12,145 INFO L87 Difference]: Start difference. First operand 250 states and 343 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:54:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:12,540 INFO L93 Difference]: Finished difference Result 918 states and 1341 transitions. [2021-11-12 23:54:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:54:12,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 59 [2021-11-12 23:54:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:12,554 INFO L225 Difference]: With dead ends: 918 [2021-11-12 23:54:12,558 INFO L226 Difference]: Without dead ends: 690 [2021-11-12 23:54:12,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:54:12,563 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 311 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 197.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.82ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 271.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:12,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 1019 Invalid, 164 Unknown, 0 Unchecked, 9.82ms Time], IncrementalHoareTripleChecker [53 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 271.77ms Time] [2021-11-12 23:54:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-12 23:54:12,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 675. [2021-11-12 23:54:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 481 states have (on average 1.3762993762993763) internal successors, (662), 572 states have internal predecessors, (662), 129 states have call successors, (129), 64 states have call predecessors, (129), 64 states have return successors, (161), 93 states have call predecessors, (161), 129 states have call successors, (161) [2021-11-12 23:54:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 952 transitions. [2021-11-12 23:54:12,695 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 952 transitions. Word has length 59 [2021-11-12 23:54:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:12,696 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 952 transitions. [2021-11-12 23:54:12,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:54:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 952 transitions. [2021-11-12 23:54:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 23:54:12,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:12,701 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:12,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:12,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:12,914 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:12,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash 323360210, now seen corresponding path program 1 times [2021-11-12 23:54:12,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:12,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657568948] [2021-11-12 23:54:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:12,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:12,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:12,917 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:12,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:54:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:13,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:54:13,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:13,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:13,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:13,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657568948] [2021-11-12 23:54:13,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657568948] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:13,357 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:13,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:54:13,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459562090] [2021-11-12 23:54:13,357 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:13,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:54:13,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:13,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:54:13,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:54:13,360 INFO L87 Difference]: Start difference. First operand 675 states and 952 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-12 23:54:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:13,505 INFO L93 Difference]: Finished difference Result 1578 states and 2342 transitions. [2021-11-12 23:54:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:54:13,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 61 [2021-11-12 23:54:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:13,515 INFO L225 Difference]: With dead ends: 1578 [2021-11-12 23:54:13,515 INFO L226 Difference]: Without dead ends: 925 [2021-11-12 23:54:13,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:54:13,521 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 128 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:13,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 265 Invalid, 23 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [10 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 51.54ms Time] [2021-11-12 23:54:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-11-12 23:54:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 912. [2021-11-12 23:54:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 674 states have (on average 1.3264094955489614) internal successors, (894), 759 states have internal predecessors, (894), 141 states have call successors, (141), 92 states have call predecessors, (141), 96 states have return successors, (258), 139 states have call predecessors, (258), 141 states have call successors, (258) [2021-11-12 23:54:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1293 transitions. [2021-11-12 23:54:13,613 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1293 transitions. Word has length 61 [2021-11-12 23:54:13,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:13,626 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1293 transitions. [2021-11-12 23:54:13,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-12 23:54:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1293 transitions. [2021-11-12 23:54:13,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:54:13,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:13,631 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:13,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 23:54:13,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:13,844 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:13,845 INFO L85 PathProgramCache]: Analyzing trace with hash 311962835, now seen corresponding path program 1 times [2021-11-12 23:54:13,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:13,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944160923] [2021-11-12 23:54:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:13,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:13,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:13,848 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:13,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:54:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:14,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:54:14,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:54:14,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:14,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:14,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944160923] [2021-11-12 23:54:14,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944160923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:54:14,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [430294859] [2021-11-12 23:54:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:14,981 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:54:14,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:54:14,987 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:54:15,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 23:54:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:54:15,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:54:15,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 23:54:15,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [430294859] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:15,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:54:15,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 8, 6] total 17 [2021-11-12 23:54:15,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54136169] [2021-11-12 23:54:15,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:15,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:54:15,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:15,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:54:15,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:54:15,841 INFO L87 Difference]: Start difference. First operand 912 states and 1293 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:54:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:16,259 INFO L93 Difference]: Finished difference Result 997 states and 1410 transitions. [2021-11-12 23:54:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:54:16,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2021-11-12 23:54:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:16,269 INFO L225 Difference]: With dead ends: 997 [2021-11-12 23:54:16,270 INFO L226 Difference]: Without dead ends: 995 [2021-11-12 23:54:16,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:54:16,272 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 249 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.15ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 254.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:16,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 583 Invalid, 167 Unknown, 0 Unchecked, 6.15ms Time], IncrementalHoareTripleChecker [64 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 254.25ms Time] [2021-11-12 23:54:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-11-12 23:54:16,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 972. [2021-11-12 23:54:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 722 states have (on average 1.3060941828254848) internal successors, (943), 807 states have internal predecessors, (943), 141 states have call successors, (141), 92 states have call predecessors, (141), 108 states have return successors, (282), 155 states have call predecessors, (282), 141 states have call successors, (282) [2021-11-12 23:54:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1366 transitions. [2021-11-12 23:54:16,377 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1366 transitions. Word has length 85 [2021-11-12 23:54:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:16,378 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1366 transitions. [2021-11-12 23:54:16,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:54:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1366 transitions. [2021-11-12 23:54:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:54:16,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:16,386 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:16,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:16,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-12 23:54:16,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:54:16,800 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:16,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1300611501, now seen corresponding path program 1 times [2021-11-12 23:54:16,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:16,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28191954] [2021-11-12 23:54:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:16,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:16,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:16,806 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:16,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:54:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:17,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:54:17,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:54:17,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:18,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:18,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28191954] [2021-11-12 23:54:18,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28191954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:54:18,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [264436683] [2021-11-12 23:54:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:18,015 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:54:18,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:54:18,016 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:54:18,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 23:54:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:18,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:54:18,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:18,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:54:18,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [264436683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:18,697 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:54:18,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 8] total 13 [2021-11-12 23:54:18,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277417252] [2021-11-12 23:54:18,697 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:18,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:54:18,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:18,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:54:18,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:54:18,700 INFO L87 Difference]: Start difference. First operand 972 states and 1366 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:54:20,237 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:20,305 INFO L93 Difference]: Finished difference Result 1505 states and 2111 transitions. [2021-11-12 23:54:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:54:20,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 109 [2021-11-12 23:54:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:20,312 INFO L225 Difference]: With dead ends: 1505 [2021-11-12 23:54:20,312 INFO L226 Difference]: Without dead ends: 555 [2021-11-12 23:54:20,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:54:20,317 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 18 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1541.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1555.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:20,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 348 Invalid, 6 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 1555.38ms Time] [2021-11-12 23:54:20,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-12 23:54:20,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 549. [2021-11-12 23:54:20,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 411 states have (on average 1.294403892944039) internal successors, (532), 457 states have internal predecessors, (532), 78 states have call successors, (78), 51 states have call predecessors, (78), 59 states have return successors, (145), 86 states have call predecessors, (145), 78 states have call successors, (145) [2021-11-12 23:54:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 755 transitions. [2021-11-12 23:54:20,362 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 755 transitions. Word has length 109 [2021-11-12 23:54:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:20,363 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 755 transitions. [2021-11-12 23:54:20,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:54:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 755 transitions. [2021-11-12 23:54:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 23:54:20,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:20,368 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:20,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:20,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:20,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:54:20,782 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:20,783 INFO L85 PathProgramCache]: Analyzing trace with hash -341993283, now seen corresponding path program 1 times [2021-11-12 23:54:20,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:20,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000040985] [2021-11-12 23:54:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:20,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:20,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:20,785 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:20,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:54:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:54:21,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:21,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:54:22,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:22,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000040985] [2021-11-12 23:54:22,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000040985] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:22,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:54:22,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2021-11-12 23:54:22,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167269145] [2021-11-12 23:54:22,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:22,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:54:22,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:22,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:54:22,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:54:22,125 INFO L87 Difference]: Start difference. First operand 549 states and 755 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-12 23:54:23,908 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:25,106 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:26,347 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:27,632 INFO L93 Difference]: Finished difference Result 1769 states and 2567 transitions. [2021-11-12 23:54:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:54:27,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 129 [2021-11-12 23:54:27,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:27,645 INFO L225 Difference]: With dead ends: 1769 [2021-11-12 23:54:27,646 INFO L226 Difference]: Without dead ends: 1383 [2021-11-12 23:54:27,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:54:27,652 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 630 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5095.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.30ms SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5311.83ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:27,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 733 Invalid, 1121 Unknown, 0 Unchecked, 13.30ms Time], IncrementalHoareTripleChecker [261 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 5311.83ms Time] [2021-11-12 23:54:27,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-11-12 23:54:27,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1361. [2021-11-12 23:54:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1031 states have (on average 1.2948593598448108) internal successors, (1335), 1141 states have internal predecessors, (1335), 184 states have call successors, (184), 124 states have call predecessors, (184), 145 states have return successors, (355), 204 states have call predecessors, (355), 184 states have call successors, (355) [2021-11-12 23:54:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1874 transitions. [2021-11-12 23:54:27,793 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1874 transitions. Word has length 129 [2021-11-12 23:54:27,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:27,793 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 1874 transitions. [2021-11-12 23:54:27,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-12 23:54:27,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1874 transitions. [2021-11-12 23:54:27,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:54:27,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:27,798 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:27,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:28,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:28,011 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:28,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:28,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1610005, now seen corresponding path program 1 times [2021-11-12 23:54:28,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:28,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097904427] [2021-11-12 23:54:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:28,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:28,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:28,014 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:28,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:54:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:28,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:54:28,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:54:28,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:54:28,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:28,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097904427] [2021-11-12 23:54:28,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097904427] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:28,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:54:28,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-12 23:54:28,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478403382] [2021-11-12 23:54:28,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:28,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:54:28,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:28,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:54:28,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:54:28,733 INFO L87 Difference]: Start difference. First operand 1361 states and 1874 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:54:28,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:28,900 INFO L93 Difference]: Finished difference Result 2760 states and 4033 transitions. [2021-11-12 23:54:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:54:28,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 112 [2021-11-12 23:54:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:28,914 INFO L225 Difference]: With dead ends: 2760 [2021-11-12 23:54:28,915 INFO L226 Difference]: Without dead ends: 1421 [2021-11-12 23:54:28,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:54:28,926 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 12 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.09ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:28,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 661 Invalid, 17 Unknown, 0 Unchecked, 4.09ms Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 32.77ms Time] [2021-11-12 23:54:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-11-12 23:54:29,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1379. [2021-11-12 23:54:29,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1049 states have (on average 1.2897998093422307) internal successors, (1353), 1159 states have internal predecessors, (1353), 184 states have call successors, (184), 124 states have call predecessors, (184), 145 states have return successors, (355), 204 states have call predecessors, (355), 184 states have call successors, (355) [2021-11-12 23:54:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1892 transitions. [2021-11-12 23:54:29,093 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1892 transitions. Word has length 112 [2021-11-12 23:54:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:29,093 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 1892 transitions. [2021-11-12 23:54:29,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:54:29,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1892 transitions. [2021-11-12 23:54:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:54:29,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:29,097 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:29,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:29,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:29,317 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:29,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1385175405, now seen corresponding path program 1 times [2021-11-12 23:54:29,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:29,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125773666] [2021-11-12 23:54:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:29,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:29,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:29,320 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:29,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:54:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:29,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:54:29,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:54:29,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:54:30,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:30,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125773666] [2021-11-12 23:54:30,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125773666] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:30,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:54:30,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:54:30,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975966404] [2021-11-12 23:54:30,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:30,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:54:30,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:30,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:54:30,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:54:30,116 INFO L87 Difference]: Start difference. First operand 1379 states and 1892 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:54:30,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:30,239 INFO L93 Difference]: Finished difference Result 2567 states and 3634 transitions. [2021-11-12 23:54:30,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:54:30,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 112 [2021-11-12 23:54:30,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:30,251 INFO L225 Difference]: With dead ends: 2567 [2021-11-12 23:54:30,251 INFO L226 Difference]: Without dead ends: 1210 [2021-11-12 23:54:30,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:54:30,259 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 13 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:30,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 488 Invalid, 11 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 14.30ms Time] [2021-11-12 23:54:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-11-12 23:54:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1208. [2021-11-12 23:54:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 915 states have (on average 1.298360655737705) internal successors, (1188), 1011 states have internal predecessors, (1188), 168 states have call successors, (168), 112 states have call predecessors, (168), 124 states have return successors, (280), 171 states have call predecessors, (280), 168 states have call successors, (280) [2021-11-12 23:54:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1636 transitions. [2021-11-12 23:54:30,374 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1636 transitions. Word has length 112 [2021-11-12 23:54:30,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:30,374 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 1636 transitions. [2021-11-12 23:54:30,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:54:30,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1636 transitions. [2021-11-12 23:54:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:54:30,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:30,379 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:30,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:30,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:30,593 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:30,593 INFO L85 PathProgramCache]: Analyzing trace with hash -682729835, now seen corresponding path program 1 times [2021-11-12 23:54:30,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:30,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200650633] [2021-11-12 23:54:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:30,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:30,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:30,595 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:30,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:54:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:30,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:54:30,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:54:31,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:54:31,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:31,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200650633] [2021-11-12 23:54:31,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200650633] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:54:31,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:54:31,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-12 23:54:31,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582154106] [2021-11-12 23:54:31,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:31,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:54:31,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:31,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:54:31,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:54:31,397 INFO L87 Difference]: Start difference. First operand 1208 states and 1636 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 23:54:32,607 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:32,704 INFO L93 Difference]: Finished difference Result 2499 states and 3477 transitions. [2021-11-12 23:54:32,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:54:32,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 116 [2021-11-12 23:54:32,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:32,715 INFO L225 Difference]: With dead ends: 2499 [2021-11-12 23:54:32,715 INFO L226 Difference]: Without dead ends: 1313 [2021-11-12 23:54:32,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:54:32,724 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 90 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1214.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1226.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:32,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 316 Invalid, 4 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 1226.57ms Time] [2021-11-12 23:54:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-11-12 23:54:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1295. [2021-11-12 23:54:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 990 states have (on average 1.2898989898989899) internal successors, (1277), 1084 states have internal predecessors, (1277), 172 states have call successors, (172), 124 states have call predecessors, (172), 132 states have return successors, (272), 171 states have call predecessors, (272), 172 states have call successors, (272) [2021-11-12 23:54:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1721 transitions. [2021-11-12 23:54:32,838 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1721 transitions. Word has length 116 [2021-11-12 23:54:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:32,839 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 1721 transitions. [2021-11-12 23:54:32,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 23:54:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1721 transitions. [2021-11-12 23:54:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 23:54:32,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:32,843 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:32,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:33,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:33,056 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:33,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:33,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2105279047, now seen corresponding path program 1 times [2021-11-12 23:54:33,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:33,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927681521] [2021-11-12 23:54:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:33,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:33,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:33,059 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:33,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:54:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:33,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:54:33,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:54:33,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-12 23:54:34,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:34,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927681521] [2021-11-12 23:54:34,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927681521] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:54:34,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1870971972] [2021-11-12 23:54:34,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:34,131 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:54:34,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:54:34,132 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:54:34,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 23:54:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:34,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:54:34,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:54:34,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-12 23:54:35,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1870971972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:54:35,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773728337] [2021-11-12 23:54:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:35,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:54:35,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:54:35,027 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:54:35,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-12 23:54:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:35,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:54:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:54:35,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-12 23:54:35,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773728337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:54:35,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:54:35,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 8, 9] total 15 [2021-11-12 23:54:35,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148354815] [2021-11-12 23:54:35,945 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:54:35,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:54:35,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:35,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:54:35,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:54:35,948 INFO L87 Difference]: Start difference. First operand 1295 states and 1721 transitions. Second operand has 15 states, 15 states have (on average 8.266666666666667) internal successors, (124), 14 states have internal predecessors, (124), 7 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2021-11-12 23:54:37,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:38,506 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:41,271 INFO L93 Difference]: Finished difference Result 3069 states and 4203 transitions. [2021-11-12 23:54:41,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-12 23:54:41,272 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.266666666666667) internal successors, (124), 14 states have internal predecessors, (124), 7 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 118 [2021-11-12 23:54:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:41,289 INFO L225 Difference]: With dead ends: 3069 [2021-11-12 23:54:41,289 INFO L226 Difference]: Without dead ends: 2041 [2021-11-12 23:54:41,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=335, Invalid=1225, Unknown=0, NotChecked=0, Total=1560 [2021-11-12 23:54:41,297 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 1245 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4321.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.00ms SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4620.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:41,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1273 Valid, 1042 Invalid, 2279 Unknown, 0 Unchecked, 24.00ms Time], IncrementalHoareTripleChecker [708 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 4620.84ms Time] [2021-11-12 23:54:41,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-11-12 23:54:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1918. [2021-11-12 23:54:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1464 states have (on average 1.296448087431694) internal successors, (1898), 1603 states have internal predecessors, (1898), 264 states have call successors, (264), 187 states have call predecessors, (264), 189 states have return successors, (444), 245 states have call predecessors, (444), 264 states have call successors, (444) [2021-11-12 23:54:41,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2606 transitions. [2021-11-12 23:54:41,490 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2606 transitions. Word has length 118 [2021-11-12 23:54:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:41,491 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 2606 transitions. [2021-11-12 23:54:41,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.266666666666667) internal successors, (124), 14 states have internal predecessors, (124), 7 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2021-11-12 23:54:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2606 transitions. [2021-11-12 23:54:41,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-12 23:54:41,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:41,498 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:41,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:41,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:41,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:42,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:54:42,113 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:42,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:42,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1512307827, now seen corresponding path program 2 times [2021-11-12 23:54:42,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:42,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944069901] [2021-11-12 23:54:42,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:54:42,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:42,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:42,115 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:42,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:54:43,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:54:43,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-12 23:54:43,570 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:54:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:54:45,463 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-12 23:54:45,464 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:54:45,465 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:54:45,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:45,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:45,689 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:45,693 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:54:45,786 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-12 23:54:45,790 INFO L158 Benchmark]: Toolchain (without parser) took 40931.56ms. Allocated memory was 56.6MB in the beginning and 146.8MB in the end (delta: 90.2MB). Free memory was 33.6MB in the beginning and 90.7MB in the end (delta: -57.1MB). Peak memory consumption was 92.8MB. Max. memory is 16.1GB. [2021-11-12 23:54:45,791 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 56.6MB. Free memory was 37.6MB in the beginning and 37.5MB in the end (delta: 42.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:54:45,791 INFO L158 Benchmark]: CACSL2BoogieTranslator took 934.17ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 33.4MB in the beginning and 35.0MB in the end (delta: -1.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:54:45,792 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.54ms. Allocated memory is still 69.2MB. Free memory was 34.8MB in the beginning and 49.8MB in the end (delta: -15.1MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2021-11-12 23:54:45,792 INFO L158 Benchmark]: Boogie Preprocessor took 43.74ms. Allocated memory is still 69.2MB. Free memory was 49.8MB in the beginning and 47.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:54:45,793 INFO L158 Benchmark]: RCFGBuilder took 2635.16ms. Allocated memory is still 69.2MB. Free memory was 47.5MB in the beginning and 28.8MB in the end (delta: 18.6MB). Peak memory consumption was 19.4MB. Max. memory is 16.1GB. [2021-11-12 23:54:45,794 INFO L158 Benchmark]: TraceAbstraction took 37234.34ms. Allocated memory was 83.9MB in the beginning and 146.8MB in the end (delta: 62.9MB). Free memory was 63.5MB in the beginning and 90.7MB in the end (delta: -27.1MB). Peak memory consumption was 94.2MB. Max. memory is 16.1GB. [2021-11-12 23:54:45,796 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 56.6MB. Free memory was 37.6MB in the beginning and 37.5MB in the end (delta: 42.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 934.17ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 33.4MB in the beginning and 35.0MB in the end (delta: -1.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.54ms. Allocated memory is still 69.2MB. Free memory was 34.8MB in the beginning and 49.8MB in the end (delta: -15.1MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.74ms. Allocated memory is still 69.2MB. Free memory was 49.8MB in the beginning and 47.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2635.16ms. Allocated memory is still 69.2MB. Free memory was 47.5MB in the beginning and 28.8MB in the end (delta: 18.6MB). Peak memory consumption was 19.4MB. Max. memory is 16.1GB. * TraceAbstraction took 37234.34ms. Allocated memory was 83.9MB in the beginning and 146.8MB in the end (delta: 62.9MB). Free memory was 63.5MB in the beginning and 90.7MB in the end (delta: -27.1MB). Peak memory consumption was 94.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-12 23:54:45,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f89e6381-ead5-4b15-a265-39106848129b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null