./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f29a19c3efa542dcf2ceb090606fb32840c0b6e985b77630bcd852a7818d8a39 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:24:47,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:24:47,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:24:47,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:24:47,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:24:47,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:24:47,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:24:47,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:24:47,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:24:47,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:24:47,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:24:47,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:24:47,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:24:47,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:24:47,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:24:47,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:24:47,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:24:47,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:24:47,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:24:47,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:24:47,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:24:47,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:24:47,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:24:47,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:24:47,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:24:47,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:24:47,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:24:47,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:24:47,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:24:47,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:24:47,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:24:47,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:24:47,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:24:47,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:24:47,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:24:47,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:24:47,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:24:47,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:24:47,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:24:47,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:24:47,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:24:47,655 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:24:47,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:24:47,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:24:47,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:24:47,726 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:24:47,727 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:24:47,727 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:24:47,727 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:24:47,728 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:24:47,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:24:47,728 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:24:47,736 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:24:47,739 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:24:47,740 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:24:47,741 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:24:47,741 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:24:47,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:24:47,743 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:24:47,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:24:47,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:24:47,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:24:47,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:24:47,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:24:47,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:24:47,746 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:24:47,746 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:24:47,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:24:47,747 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:24:47,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:24:47,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:24:47,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:24:47,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:24:47,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:24:47,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:24:47,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:24:47,754 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:24:47,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:24:47,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:24:47,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:24:47,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:24:47,755 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_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f29a19c3efa542dcf2ceb090606fb32840c0b6e985b77630bcd852a7818d8a39 [2021-11-07 01:24:48,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:24:48,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:24:48,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:24:48,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:24:48,236 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:24:48,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product26.cil.c [2021-11-07 01:24:48,380 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/data/b60025636/ff1107b97d18455d84d6ca52a40b5baa/FLAG0618272fb [2021-11-07 01:24:49,266 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:24:49,271 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/sv-benchmarks/c/product-lines/email_spec11_product26.cil.c [2021-11-07 01:24:49,307 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/data/b60025636/ff1107b97d18455d84d6ca52a40b5baa/FLAG0618272fb [2021-11-07 01:24:49,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/data/b60025636/ff1107b97d18455d84d6ca52a40b5baa [2021-11-07 01:24:49,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:24:49,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:24:49,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:24:49,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:24:49,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:24:49,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:49" (1/1) ... [2021-11-07 01:24:49,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67c9e81c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:49, skipping insertion in model container [2021-11-07 01:24:49,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:49" (1/1) ... [2021-11-07 01:24:49,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:24:49,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:24:50,329 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_9fe02895-7bc2-4c65-b43d-64a04504b562/sv-benchmarks/c/product-lines/email_spec11_product26.cil.c[63627,63640] [2021-11-07 01:24:50,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:24:50,357 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:24:50,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4e94f3ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:50, skipping insertion in model container [2021-11-07 01:24:50,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:24:50,359 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:24:50,362 INFO L168 Benchmark]: Toolchain (without parser) took 981.65 ms. Allocated memory is still 98.6 MB. Free memory was 62.4 MB in the beginning and 60.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:24:50,364 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 98.6 MB. Free memory is still 52.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:24:50,366 INFO L168 Benchmark]: CACSL2BoogieTranslator took 977.64 ms. Allocated memory is still 98.6 MB. Free memory was 62.2 MB in the beginning and 60.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:24:50,370 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 98.6 MB. Free memory is still 52.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 977.64 ms. Allocated memory is still 98.6 MB. Free memory was 62.2 MB in the beginning and 60.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 993]: 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_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f29a19c3efa542dcf2ceb090606fb32840c0b6e985b77630bcd852a7818d8a39 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:24:53,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:24:53,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:24:53,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:24:53,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:24:53,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:24:53,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:24:53,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:24:53,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:24:53,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:24:53,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:24:53,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:24:53,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:24:53,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:24:53,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:24:53,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:24:53,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:24:53,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:24:53,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:24:53,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:24:53,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:24:53,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:24:53,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:24:53,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:24:53,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:24:53,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:24:53,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:24:53,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:24:53,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:24:53,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:24:53,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:24:53,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:24:53,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:24:53,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:24:53,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:24:53,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:24:53,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:24:53,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:24:53,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:24:53,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:24:53,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:24:53,533 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:24:53,567 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:24:53,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:24:53,568 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:24:53,569 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:24:53,569 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:24:53,569 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:24:53,570 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:24:53,571 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:24:53,571 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:24:53,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:24:53,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:24:53,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:24:53,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:24:53,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:24:53,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:24:53,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:24:53,574 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:24:53,574 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:24:53,574 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:24:53,575 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:24:53,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:24:53,575 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:24:53,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:24:53,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:24:53,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:24:53,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:24:53,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:24:53,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:24:53,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:24:53,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:24:53,578 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:24:53,578 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:53,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:24:53,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:24:53,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:24:53,579 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_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f29a19c3efa542dcf2ceb090606fb32840c0b6e985b77630bcd852a7818d8a39 [2021-11-07 01:24:54,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:24:54,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:24:54,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:24:54,119 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:24:54,119 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:24:54,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product26.cil.c [2021-11-07 01:24:54,212 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/data/1a3157750/607f5edf96f64165ab6c6f86bef922d2/FLAG65360446a [2021-11-07 01:24:55,193 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:24:55,197 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/sv-benchmarks/c/product-lines/email_spec11_product26.cil.c [2021-11-07 01:24:55,245 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/data/1a3157750/607f5edf96f64165ab6c6f86bef922d2/FLAG65360446a [2021-11-07 01:24:55,768 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/data/1a3157750/607f5edf96f64165ab6c6f86bef922d2 [2021-11-07 01:24:55,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:24:55,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:24:55,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:24:55,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:24:55,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:24:55,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:55" (1/1) ... [2021-11-07 01:24:55,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5382f596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:55, skipping insertion in model container [2021-11-07 01:24:55,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:55" (1/1) ... [2021-11-07 01:24:55,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:24:55,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:24:56,643 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_9fe02895-7bc2-4c65-b43d-64a04504b562/sv-benchmarks/c/product-lines/email_spec11_product26.cil.c[63627,63640] [2021-11-07 01:24:56,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:24:56,687 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:24:56,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:24:56,955 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_9fe02895-7bc2-4c65-b43d-64a04504b562/sv-benchmarks/c/product-lines/email_spec11_product26.cil.c[63627,63640] [2021-11-07 01:24:56,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:24:56,991 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:24:57,184 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_9fe02895-7bc2-4c65-b43d-64a04504b562/sv-benchmarks/c/product-lines/email_spec11_product26.cil.c[63627,63640] [2021-11-07 01:24:57,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:24:57,269 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:24:57,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57 WrapperNode [2021-11-07 01:24:57,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:24:57,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:24:57,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:24:57,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:24:57,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2021-11-07 01:24:57,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2021-11-07 01:24:57,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:24:57,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:24:57,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:24:57,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:24:57,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2021-11-07 01:24:57,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2021-11-07 01:24:57,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2021-11-07 01:24:57,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2021-11-07 01:24:57,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2021-11-07 01:24:57,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2021-11-07 01:24:57,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2021-11-07 01:24:57,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:24:57,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:24:57,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:24:57,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:24:57,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2021-11-07 01:24:57,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:24:57,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:24:57,834 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:24:57,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:24:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:24:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:24:57,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:24:57,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:24:57,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:25:04,504 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:25:04,504 INFO L299 CfgBuilder]: Removed 725 assume(true) statements. [2021-11-07 01:25:04,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:04 BoogieIcfgContainer [2021-11-07 01:25:04,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:25:04,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:25:04,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:25:04,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:25:04,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:24:55" (1/3) ... [2021-11-07 01:25:04,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea22fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:04, skipping insertion in model container [2021-11-07 01:25:04,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (2/3) ... [2021-11-07 01:25:04,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea22fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:04, skipping insertion in model container [2021-11-07 01:25:04,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:04" (3/3) ... [2021-11-07 01:25:04,551 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product26.cil.c [2021-11-07 01:25:04,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:25:04,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:25:04,632 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:25:04,640 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:25:04,640 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:25:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 1026 states, 1019 states have (on average 1.7262021589793917) internal successors, (1759), 1025 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:25:04,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:04,719 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:04,720 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:04,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:04,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1984536039, now seen corresponding path program 1 times [2021-11-07 01:25:04,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:04,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956067479] [2021-11-07 01:25:04,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:04,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:04,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:04,752 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:04,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:25:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:25:05,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:05,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:05,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:05,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956067479] [2021-11-07 01:25:05,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956067479] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:05,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:05,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:25:05,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536109547] [2021-11-07 01:25:05,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:25:05,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:05,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:25:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:25:05,927 INFO L87 Difference]: Start difference. First operand has 1026 states, 1019 states have (on average 1.7262021589793917) internal successors, (1759), 1025 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:06,040 INFO L93 Difference]: Finished difference Result 1763 states and 2988 transitions. [2021-11-07 01:25:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:25:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:25:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:06,069 INFO L225 Difference]: With dead ends: 1763 [2021-11-07 01:25:06,069 INFO L226 Difference]: Without dead ends: 944 [2021-11-07 01:25:06,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:25:06,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-11-07 01:25:06,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 944. [2021-11-07 01:25:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 938 states have (on average 1.724946695095949) internal successors, (1618), 943 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1618 transitions. [2021-11-07 01:25:06,194 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1618 transitions. Word has length 55 [2021-11-07 01:25:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:06,195 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 1618 transitions. [2021-11-07 01:25:06,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:06,196 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1618 transitions. [2021-11-07 01:25:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:25:06,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:06,203 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:06,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:25:06,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:06,421 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:06,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:06,422 INFO L85 PathProgramCache]: Analyzing trace with hash 592354638, now seen corresponding path program 1 times [2021-11-07 01:25:06,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:06,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159195397] [2021-11-07 01:25:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:06,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:06,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:06,431 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:06,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:25:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:06,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:25:06,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:07,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:07,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:07,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159195397] [2021-11-07 01:25:07,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159195397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:07,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:07,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:25:07,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115988647] [2021-11-07 01:25:07,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:25:07,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:25:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:07,484 INFO L87 Difference]: Start difference. First operand 944 states and 1618 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:07,659 INFO L93 Difference]: Finished difference Result 2802 states and 4806 transitions. [2021-11-07 01:25:07,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:25:07,665 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 01:25:07,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:07,684 INFO L225 Difference]: With dead ends: 2802 [2021-11-07 01:25:07,685 INFO L226 Difference]: Without dead ends: 1873 [2021-11-07 01:25:07,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-11-07 01:25:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 943. [2021-11-07 01:25:07,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 937 states have (on average 1.7214514407684098) internal successors, (1613), 942 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1613 transitions. [2021-11-07 01:25:07,780 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1613 transitions. Word has length 56 [2021-11-07 01:25:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:07,781 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 1613 transitions. [2021-11-07 01:25:07,782 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:07,782 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1613 transitions. [2021-11-07 01:25:07,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:25:07,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:07,798 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:07,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:08,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:08,016 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:08,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1781630168, now seen corresponding path program 1 times [2021-11-07 01:25:08,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:08,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503308654] [2021-11-07 01:25:08,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:08,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:08,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:08,022 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:08,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:25:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:08,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:25:08,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:08,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:09,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:09,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503308654] [2021-11-07 01:25:09,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503308654] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:09,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:09,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:25:09,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685838385] [2021-11-07 01:25:09,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:25:09,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:09,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:25:09,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:25:09,104 INFO L87 Difference]: Start difference. First operand 943 states and 1613 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:09,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:09,584 INFO L93 Difference]: Finished difference Result 3689 states and 6314 transitions. [2021-11-07 01:25:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:25:09,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:25:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:09,607 INFO L225 Difference]: With dead ends: 3689 [2021-11-07 01:25:09,607 INFO L226 Difference]: Without dead ends: 2764 [2021-11-07 01:25:09,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:25:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2021-11-07 01:25:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 942. [2021-11-07 01:25:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 936 states have (on average 1.7190170940170941) internal successors, (1609), 941 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1609 transitions. [2021-11-07 01:25:09,709 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1609 transitions. Word has length 58 [2021-11-07 01:25:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:09,709 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1609 transitions. [2021-11-07 01:25:09,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1609 transitions. [2021-11-07 01:25:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:25:09,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:09,714 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:09,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:09,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:09,937 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:09,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:09,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1783616459, now seen corresponding path program 1 times [2021-11-07 01:25:09,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:09,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042343881] [2021-11-07 01:25:09,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:09,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:09,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:09,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:09,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:25:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:10,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:25:10,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:10,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:10,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:10,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042343881] [2021-11-07 01:25:10,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042343881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:10,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:10,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:25:10,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138102281] [2021-11-07 01:25:10,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:25:10,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:10,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:25:10,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:10,909 INFO L87 Difference]: Start difference. First operand 942 states and 1609 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:11,067 INFO L93 Difference]: Finished difference Result 1881 states and 3215 transitions. [2021-11-07 01:25:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:25:11,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:25:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:11,076 INFO L225 Difference]: With dead ends: 1881 [2021-11-07 01:25:11,077 INFO L226 Difference]: Without dead ends: 947 [2021-11-07 01:25:11,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-11-07 01:25:11,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 942. [2021-11-07 01:25:11,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 936 states have (on average 1.7158119658119657) internal successors, (1606), 941 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1606 transitions. [2021-11-07 01:25:11,167 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1606 transitions. Word has length 59 [2021-11-07 01:25:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:11,170 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1606 transitions. [2021-11-07 01:25:11,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1606 transitions. [2021-11-07 01:25:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:25:11,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:11,175 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:11,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:11,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:11,394 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:11,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:11,394 INFO L85 PathProgramCache]: Analyzing trace with hash -314807488, now seen corresponding path program 1 times [2021-11-07 01:25:11,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:11,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10662416] [2021-11-07 01:25:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:11,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:11,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:11,397 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:11,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:25:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:11,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:25:11,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:12,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:12,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:12,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10662416] [2021-11-07 01:25:12,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10662416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:12,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:12,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:25:12,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367810730] [2021-11-07 01:25:12,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:25:12,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:25:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:25:12,395 INFO L87 Difference]: Start difference. First operand 942 states and 1606 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:12,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:12,860 INFO L93 Difference]: Finished difference Result 3676 states and 6290 transitions. [2021-11-07 01:25:12,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:25:12,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:25:12,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:12,883 INFO L225 Difference]: With dead ends: 3676 [2021-11-07 01:25:12,883 INFO L226 Difference]: Without dead ends: 2760 [2021-11-07 01:25:12,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:25:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-11-07 01:25:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 942. [2021-11-07 01:25:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 936 states have (on average 1.7126068376068375) internal successors, (1603), 941 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1603 transitions. [2021-11-07 01:25:13,031 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1603 transitions. Word has length 60 [2021-11-07 01:25:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:13,032 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1603 transitions. [2021-11-07 01:25:13,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1603 transitions. [2021-11-07 01:25:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:25:13,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:13,034 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:13,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:13,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:13,253 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1524213275, now seen corresponding path program 1 times [2021-11-07 01:25:13,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:13,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727982154] [2021-11-07 01:25:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:13,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:13,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:13,256 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:13,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:25:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:13,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:13,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:14,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:14,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:14,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727982154] [2021-11-07 01:25:14,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727982154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:14,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:14,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:25:14,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702919414] [2021-11-07 01:25:14,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:25:14,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:14,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:25:14,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:14,282 INFO L87 Difference]: Start difference. First operand 942 states and 1603 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:14,527 INFO L93 Difference]: Finished difference Result 2513 states and 4267 transitions. [2021-11-07 01:25:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:25:14,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:25:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:14,542 INFO L225 Difference]: With dead ends: 2513 [2021-11-07 01:25:14,542 INFO L226 Difference]: Without dead ends: 1858 [2021-11-07 01:25:14,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:14,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-11-07 01:25:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1203. [2021-11-07 01:25:14,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1197 states have (on average 1.7401837928153718) internal successors, (2083), 1202 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 2083 transitions. [2021-11-07 01:25:14,676 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 2083 transitions. Word has length 62 [2021-11-07 01:25:14,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:14,677 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 2083 transitions. [2021-11-07 01:25:14,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:14,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 2083 transitions. [2021-11-07 01:25:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:25:14,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:14,680 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:14,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:14,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:14,898 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:14,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2141248876, now seen corresponding path program 1 times [2021-11-07 01:25:14,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:14,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417917394] [2021-11-07 01:25:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:14,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:14,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:14,904 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:14,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:25:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:15,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:15,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:15,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:15,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:15,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417917394] [2021-11-07 01:25:15,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417917394] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:15,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:15,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:15,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858200389] [2021-11-07 01:25:15,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:15,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:15,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:15,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:15,984 INFO L87 Difference]: Start difference. First operand 1203 states and 2083 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:16,194 INFO L93 Difference]: Finished difference Result 3186 states and 5508 transitions. [2021-11-07 01:25:16,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:16,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:25:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:16,211 INFO L225 Difference]: With dead ends: 3186 [2021-11-07 01:25:16,212 INFO L226 Difference]: Without dead ends: 2067 [2021-11-07 01:25:16,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-11-07 01:25:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1412. [2021-11-07 01:25:16,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1406 states have (on average 1.7539118065433854) internal successors, (2466), 1411 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2466 transitions. [2021-11-07 01:25:16,353 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2466 transitions. Word has length 74 [2021-11-07 01:25:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:16,355 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 2466 transitions. [2021-11-07 01:25:16,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2466 transitions. [2021-11-07 01:25:16,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:25:16,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:16,359 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:16,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:16,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:16,578 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:16,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:16,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1032533333, now seen corresponding path program 1 times [2021-11-07 01:25:16,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:16,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596178175] [2021-11-07 01:25:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:16,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:16,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:16,581 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:16,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:25:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:17,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:17,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:17,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:17,751 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:17,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596178175] [2021-11-07 01:25:17,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596178175] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:17,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:17,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:17,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132330292] [2021-11-07 01:25:17,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:17,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:17,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:17,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:17,754 INFO L87 Difference]: Start difference. First operand 1412 states and 2466 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:17,983 INFO L93 Difference]: Finished difference Result 3845 states and 6722 transitions. [2021-11-07 01:25:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:17,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:25:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:18,004 INFO L225 Difference]: With dead ends: 3845 [2021-11-07 01:25:18,004 INFO L226 Difference]: Without dead ends: 2525 [2021-11-07 01:25:18,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:18,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-11-07 01:25:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1870. [2021-11-07 01:25:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1864 states have (on average 1.7746781115879828) internal successors, (3308), 1869 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 3308 transitions. [2021-11-07 01:25:18,219 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 3308 transitions. Word has length 75 [2021-11-07 01:25:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:18,220 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 3308 transitions. [2021-11-07 01:25:18,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 3308 transitions. [2021-11-07 01:25:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:25:18,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:18,232 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:18,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:18,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:18,448 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash 740208038, now seen corresponding path program 1 times [2021-11-07 01:25:18,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:18,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000814993] [2021-11-07 01:25:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:18,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:18,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:18,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:18,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:25:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:19,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:19,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:19,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:19,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:19,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000814993] [2021-11-07 01:25:19,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000814993] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:19,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:19,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:19,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986171214] [2021-11-07 01:25:19,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:19,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:19,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:19,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:19,534 INFO L87 Difference]: Start difference. First operand 1870 states and 3308 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:19,840 INFO L93 Difference]: Finished difference Result 5199 states and 9217 transitions. [2021-11-07 01:25:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:19,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:25:19,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:19,867 INFO L225 Difference]: With dead ends: 5199 [2021-11-07 01:25:19,868 INFO L226 Difference]: Without dead ends: 3429 [2021-11-07 01:25:19,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-11-07 01:25:20,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2774. [2021-11-07 01:25:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2768 states have (on average 1.7958815028901733) internal successors, (4971), 2773 states have internal predecessors, (4971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 4971 transitions. [2021-11-07 01:25:20,133 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 4971 transitions. Word has length 76 [2021-11-07 01:25:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:20,133 INFO L470 AbstractCegarLoop]: Abstraction has 2774 states and 4971 transitions. [2021-11-07 01:25:20,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 4971 transitions. [2021-11-07 01:25:20,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:25:20,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:20,142 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:20,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:20,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:20,361 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:20,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1237393370, now seen corresponding path program 1 times [2021-11-07 01:25:20,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:20,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764210081] [2021-11-07 01:25:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:20,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:20,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:20,363 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:20,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:25:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:21,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:21,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:21,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:21,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:21,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764210081] [2021-11-07 01:25:21,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764210081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:21,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:21,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:21,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075197976] [2021-11-07 01:25:21,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:21,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:21,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:21,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:21,489 INFO L87 Difference]: Start difference. First operand 2774 states and 4971 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:21,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:21,851 INFO L93 Difference]: Finished difference Result 7647 states and 13725 transitions. [2021-11-07 01:25:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:21,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:25:21,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:21,911 INFO L225 Difference]: With dead ends: 7647 [2021-11-07 01:25:21,911 INFO L226 Difference]: Without dead ends: 5007 [2021-11-07 01:25:21,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5007 states. [2021-11-07 01:25:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5007 to 4352. [2021-11-07 01:25:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4346 states have (on average 1.8113207547169812) internal successors, (7872), 4351 states have internal predecessors, (7872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 7872 transitions. [2021-11-07 01:25:22,299 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 7872 transitions. Word has length 77 [2021-11-07 01:25:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:22,300 INFO L470 AbstractCegarLoop]: Abstraction has 4352 states and 7872 transitions. [2021-11-07 01:25:22,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 7872 transitions. [2021-11-07 01:25:22,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:25:22,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:22,313 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:22,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:22,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:22,532 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash -245300523, now seen corresponding path program 1 times [2021-11-07 01:25:22,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:22,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110372289] [2021-11-07 01:25:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:22,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:22,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:22,536 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:22,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:25:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:23,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:23,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:23,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:23,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:23,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110372289] [2021-11-07 01:25:23,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110372289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:23,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:23,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:23,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362222092] [2021-11-07 01:25:23,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:23,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:23,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:23,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:23,779 INFO L87 Difference]: Start difference. First operand 4352 states and 7872 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:24,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:24,336 INFO L93 Difference]: Finished difference Result 12097 states and 21911 transitions. [2021-11-07 01:25:24,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:24,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:25:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:24,366 INFO L225 Difference]: With dead ends: 12097 [2021-11-07 01:25:24,366 INFO L226 Difference]: Without dead ends: 7913 [2021-11-07 01:25:24,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:24,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7913 states. [2021-11-07 01:25:24,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7913 to 7258. [2021-11-07 01:25:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7258 states, 7252 states have (on average 1.8214285714285714) internal successors, (13209), 7257 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7258 states to 7258 states and 13209 transitions. [2021-11-07 01:25:24,892 INFO L78 Accepts]: Start accepts. Automaton has 7258 states and 13209 transitions. Word has length 78 [2021-11-07 01:25:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:24,893 INFO L470 AbstractCegarLoop]: Abstraction has 7258 states and 13209 transitions. [2021-11-07 01:25:24,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 7258 states and 13209 transitions. [2021-11-07 01:25:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:25:24,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:24,908 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:24,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:25,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:25,130 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:25,131 INFO L85 PathProgramCache]: Analyzing trace with hash 692718197, now seen corresponding path program 1 times [2021-11-07 01:25:25,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:25,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891442133] [2021-11-07 01:25:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:25,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:25,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:25,133 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:25,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:25:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:25,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:25,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:26,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:26,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:26,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891442133] [2021-11-07 01:25:26,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891442133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:26,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:26,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:26,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752402158] [2021-11-07 01:25:26,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:26,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:26,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:26,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:26,407 INFO L87 Difference]: Start difference. First operand 7258 states and 13209 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:27,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:27,223 INFO L93 Difference]: Finished difference Result 21141 states and 38533 transitions. [2021-11-07 01:25:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:27,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:25:27,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:27,278 INFO L225 Difference]: With dead ends: 21141 [2021-11-07 01:25:27,279 INFO L226 Difference]: Without dead ends: 14059 [2021-11-07 01:25:27,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:27,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14059 states. [2021-11-07 01:25:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14059 to 13404. [2021-11-07 01:25:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13404 states, 13398 states have (on average 1.8278847589192417) internal successors, (24490), 13403 states have internal predecessors, (24490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13404 states to 13404 states and 24490 transitions. [2021-11-07 01:25:28,158 INFO L78 Accepts]: Start accepts. Automaton has 13404 states and 24490 transitions. Word has length 79 [2021-11-07 01:25:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:28,159 INFO L470 AbstractCegarLoop]: Abstraction has 13404 states and 24490 transitions. [2021-11-07 01:25:28,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 13404 states and 24490 transitions. [2021-11-07 01:25:28,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:25:28,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:28,176 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:28,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:28,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:28,398 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:28,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:28,399 INFO L85 PathProgramCache]: Analyzing trace with hash 867848005, now seen corresponding path program 1 times [2021-11-07 01:25:28,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:28,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033728504] [2021-11-07 01:25:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:28,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:28,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:28,401 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:28,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:25:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:29,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:25:29,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:25:29,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:25:29,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:29,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033728504] [2021-11-07 01:25:29,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033728504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:29,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:29,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:25:29,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027733661] [2021-11-07 01:25:29,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:25:29,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:29,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:25:29,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:25:29,813 INFO L87 Difference]: Start difference. First operand 13404 states and 24490 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:33,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:33,450 INFO L93 Difference]: Finished difference Result 33309 states and 60835 transitions. [2021-11-07 01:25:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:25:33,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 01:25:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:33,520 INFO L225 Difference]: With dead ends: 33309 [2021-11-07 01:25:33,521 INFO L226 Difference]: Without dead ends: 20202 [2021-11-07 01:25:33,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:25:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20202 states. [2021-11-07 01:25:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20202 to 13371. [2021-11-07 01:25:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13371 states, 13365 states have (on average 1.8225215114104003) internal successors, (24358), 13370 states have internal predecessors, (24358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13371 states to 13371 states and 24358 transitions. [2021-11-07 01:25:34,628 INFO L78 Accepts]: Start accepts. Automaton has 13371 states and 24358 transitions. Word has length 80 [2021-11-07 01:25:34,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:34,629 INFO L470 AbstractCegarLoop]: Abstraction has 13371 states and 24358 transitions. [2021-11-07 01:25:34,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 13371 states and 24358 transitions. [2021-11-07 01:25:34,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:25:34,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:34,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:34,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:25:34,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:34,866 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:34,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1670948730, now seen corresponding path program 1 times [2021-11-07 01:25:34,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:34,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661762980] [2021-11-07 01:25:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:34,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:34,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:34,869 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:34,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:25:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:35,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:35,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:36,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:36,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:36,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661762980] [2021-11-07 01:25:36,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661762980] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:36,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:36,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:36,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603468084] [2021-11-07 01:25:36,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:36,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:36,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:36,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:36,231 INFO L87 Difference]: Start difference. First operand 13371 states and 24358 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:37,539 INFO L93 Difference]: Finished difference Result 39312 states and 71687 transitions. [2021-11-07 01:25:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 01:25:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:37,748 INFO L225 Difference]: With dead ends: 39312 [2021-11-07 01:25:37,749 INFO L226 Difference]: Without dead ends: 26124 [2021-11-07 01:25:37,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:37,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26124 states. [2021-11-07 01:25:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26124 to 25469. [2021-11-07 01:25:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25469 states, 25463 states have (on average 1.8250402544869027) internal successors, (46471), 25468 states have internal predecessors, (46471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25469 states to 25469 states and 46471 transitions. [2021-11-07 01:25:39,487 INFO L78 Accepts]: Start accepts. Automaton has 25469 states and 46471 transitions. Word has length 80 [2021-11-07 01:25:39,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:39,488 INFO L470 AbstractCegarLoop]: Abstraction has 25469 states and 46471 transitions. [2021-11-07 01:25:39,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:39,488 INFO L276 IsEmpty]: Start isEmpty. Operand 25469 states and 46471 transitions. [2021-11-07 01:25:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:25:39,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:39,508 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:39,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:25:39,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:39,713 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:39,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1220439494, now seen corresponding path program 1 times [2021-11-07 01:25:39,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:39,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543236029] [2021-11-07 01:25:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:39,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:39,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:39,721 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:39,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:25:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:40,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:25:40,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:41,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:41,325 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:41,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543236029] [2021-11-07 01:25:41,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543236029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:41,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:41,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:25:41,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291307639] [2021-11-07 01:25:41,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:41,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:41,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:41,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:41,328 INFO L87 Difference]: Start difference. First operand 25469 states and 46471 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:43,462 INFO L93 Difference]: Finished difference Result 70245 states and 127762 transitions. [2021-11-07 01:25:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:43,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:25:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:43,570 INFO L225 Difference]: With dead ends: 70245 [2021-11-07 01:25:43,570 INFO L226 Difference]: Without dead ends: 45006 [2021-11-07 01:25:43,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45006 states. [2021-11-07 01:25:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45006 to 44351. [2021-11-07 01:25:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44351 states, 44345 states have (on average 1.8143195399706844) internal successors, (80456), 44350 states have internal predecessors, (80456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:46,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44351 states to 44351 states and 80456 transitions. [2021-11-07 01:25:46,359 INFO L78 Accepts]: Start accepts. Automaton has 44351 states and 80456 transitions. Word has length 81 [2021-11-07 01:25:46,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:46,359 INFO L470 AbstractCegarLoop]: Abstraction has 44351 states and 80456 transitions. [2021-11-07 01:25:46,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:46,360 INFO L276 IsEmpty]: Start isEmpty. Operand 44351 states and 80456 transitions. [2021-11-07 01:25:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:25:46,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:46,546 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:46,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:25:46,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:46,746 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:25:46,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:46,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1511685823, now seen corresponding path program 1 times [2021-11-07 01:25:46,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:46,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444610497] [2021-11-07 01:25:46,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:46,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:46,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:46,749 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:46,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:25:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:47,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:25:47,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:25:47,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:25:48,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:48,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444610497] [2021-11-07 01:25:48,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444610497] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:48,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:48,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:25:48,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475424447] [2021-11-07 01:25:48,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:25:48,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:48,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:25:48,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:25:48,246 INFO L87 Difference]: Start difference. First operand 44351 states and 80456 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:56,673 INFO L93 Difference]: Finished difference Result 172672 states and 313125 transitions. [2021-11-07 01:25:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:25:56,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:25:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:56,994 INFO L225 Difference]: With dead ends: 172672 [2021-11-07 01:25:56,994 INFO L226 Difference]: Without dead ends: 128617 [2021-11-07 01:25:57,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:25:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128617 states. [2021-11-07 01:26:01,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128617 to 44093. [2021-11-07 01:26:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44093 states, 44087 states have (on average 1.8015287953364938) internal successors, (79424), 44092 states have internal predecessors, (79424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44093 states to 44093 states and 79424 transitions. [2021-11-07 01:26:01,178 INFO L78 Accepts]: Start accepts. Automaton has 44093 states and 79424 transitions. Word has length 82 [2021-11-07 01:26:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:01,179 INFO L470 AbstractCegarLoop]: Abstraction has 44093 states and 79424 transitions. [2021-11-07 01:26:01,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 44093 states and 79424 transitions. [2021-11-07 01:26:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:26:01,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:01,195 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:01,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 01:26:01,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:01,408 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:26:01,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:01,409 INFO L85 PathProgramCache]: Analyzing trace with hash -457884831, now seen corresponding path program 1 times [2021-11-07 01:26:01,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:01,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020580699] [2021-11-07 01:26:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:01,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:01,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:01,411 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:01,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:26:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:02,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:02,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:02,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:02,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:02,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020580699] [2021-11-07 01:26:02,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020580699] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:02,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:02,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:26:02,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976329541] [2021-11-07 01:26:02,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:02,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:02,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:02,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:26:02,877 INFO L87 Difference]: Start difference. First operand 44093 states and 79424 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:05,477 INFO L93 Difference]: Finished difference Result 88539 states and 159430 transitions. [2021-11-07 01:26:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:05,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:26:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:05,567 INFO L225 Difference]: With dead ends: 88539 [2021-11-07 01:26:05,568 INFO L226 Difference]: Without dead ends: 44748 [2021-11-07 01:26:05,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:26:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44748 states. [2021-11-07 01:26:08,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44748 to 44093. [2021-11-07 01:26:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44093 states, 44087 states have (on average 1.798625445142559) internal successors, (79296), 44092 states have internal predecessors, (79296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44093 states to 44093 states and 79296 transitions. [2021-11-07 01:26:08,527 INFO L78 Accepts]: Start accepts. Automaton has 44093 states and 79296 transitions. Word has length 82 [2021-11-07 01:26:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:08,527 INFO L470 AbstractCegarLoop]: Abstraction has 44093 states and 79296 transitions. [2021-11-07 01:26:08,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 44093 states and 79296 transitions. [2021-11-07 01:26:08,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:26:08,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:08,542 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:08,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:08,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:08,744 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:26:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:08,745 INFO L85 PathProgramCache]: Analyzing trace with hash -916247980, now seen corresponding path program 1 times [2021-11-07 01:26:08,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:08,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246926895] [2021-11-07 01:26:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:08,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:08,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:08,747 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:08,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fe02895-7bc2-4c65-b43d-64a04504b562/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:26:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:09,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:09,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:09,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:10,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:10,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246926895] [2021-11-07 01:26:10,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246926895] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:10,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:10,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:26:10,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736292835] [2021-11-07 01:26:10,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:10,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:10,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:10,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:10,226 INFO L87 Difference]: Start difference. First operand 44093 states and 79296 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)