./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product17.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_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/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_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/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_ff153ad2-b8e9-4df2-b835-391973b3a64c/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 ece4fa184f09e2184919c279a0198f8db6972fb16f8b142297bd588b2043b23f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:22:41,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:22:41,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:22:41,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:22:41,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:22:41,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:22:41,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:22:41,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:22:41,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:22:41,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:22:41,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:22:41,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:22:41,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:22:41,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:22:41,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:22:41,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:22:41,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:22:41,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:22:41,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:22:41,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:22:41,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:22:41,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:22:41,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:22:41,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:22:41,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:22:41,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:22:41,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:22:41,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:22:41,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:22:41,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:22:41,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:22:41,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:22:41,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:22:41,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:22:41,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:22:41,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:22:41,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:22:41,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:22:41,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:22:41,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:22:41,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:22:41,620 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:22:41,664 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:22:41,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:22:41,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:22:41,669 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:22:41,669 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:22:41,670 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:22:41,670 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:22:41,670 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:22:41,671 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:22:41,671 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:22:41,676 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:22:41,677 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:22:41,677 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:22:41,678 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:22:41,678 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:22:41,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:22:41,680 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:22:41,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:22:41,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:22:41,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:22:41,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:22:41,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:22:41,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:22:41,682 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:22:41,682 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:22:41,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:22:41,683 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:22:41,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:22:41,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:22:41,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:22:41,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:41,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:22:41,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:22:41,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:22:41,687 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:22:41,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:22:41,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:22:41,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:22:41,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:22:41,689 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_ff153ad2-b8e9-4df2-b835-391973b3a64c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ece4fa184f09e2184919c279a0198f8db6972fb16f8b142297bd588b2043b23f [2021-11-07 01:22:41,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:22:42,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:22:42,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:22:42,034 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:22:42,036 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:22:42,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product17.cil.c [2021-11-07 01:22:42,132 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/data/a20dc318e/82dc0bea06ee4649afbb9caecc85a978/FLAG56fb87ad4 [2021-11-07 01:22:42,855 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:22:42,864 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/sv-benchmarks/c/product-lines/email_spec3_product17.cil.c [2021-11-07 01:22:42,901 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/data/a20dc318e/82dc0bea06ee4649afbb9caecc85a978/FLAG56fb87ad4 [2021-11-07 01:22:43,054 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/data/a20dc318e/82dc0bea06ee4649afbb9caecc85a978 [2021-11-07 01:22:43,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:22:43,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:22:43,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:43,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:22:43,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:22:43,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:43" (1/1) ... [2021-11-07 01:22:43,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@550dec3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:43, skipping insertion in model container [2021-11-07 01:22:43,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:43" (1/1) ... [2021-11-07 01:22:43,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:22:43,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:43,741 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_ff153ad2-b8e9-4df2-b835-391973b3a64c/sv-benchmarks/c/product-lines/email_spec3_product17.cil.c[63718,63731] [2021-11-07 01:22:43,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:43,774 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 01:22:43,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@fded587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:43, skipping insertion in model container [2021-11-07 01:22:43,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:43,775 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:22:43,776 INFO L168 Benchmark]: Toolchain (without parser) took 715.02 ms. Allocated memory is still 109.1 MB. Free memory was 73.9 MB in the beginning and 69.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:22:43,777 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 109.1 MB. Free memory is still 62.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:22:43,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 704.71 ms. Allocated memory is still 109.1 MB. Free memory was 73.9 MB in the beginning and 69.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:22:43,779 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 109.1 MB. Free memory is still 62.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 704.71 ms. Allocated memory is still 109.1 MB. Free memory was 73.9 MB in the beginning and 69.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 432]: 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_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/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_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/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_ff153ad2-b8e9-4df2-b835-391973b3a64c/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 ece4fa184f09e2184919c279a0198f8db6972fb16f8b142297bd588b2043b23f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:22:46,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:22:46,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:22:46,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:22:46,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:22:46,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:22:46,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:22:46,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:22:46,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:22:46,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:22:46,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:22:46,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:22:46,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:22:46,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:22:46,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:22:46,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:22:46,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:22:46,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:22:46,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:22:46,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:22:46,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:22:46,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:22:46,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:22:46,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:22:46,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:22:46,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:22:46,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:22:46,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:22:46,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:22:46,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:22:46,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:22:46,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:22:46,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:22:46,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:22:46,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:22:46,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:22:46,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:22:46,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:22:46,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:22:46,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:22:46,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:22:46,435 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:22:46,463 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:22:46,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:22:46,464 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:22:46,465 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:22:46,465 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:22:46,465 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:22:46,465 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:22:46,465 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:22:46,466 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:22:46,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:22:46,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:22:46,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:22:46,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:22:46,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:22:46,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:22:46,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:22:46,468 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:22:46,468 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:22:46,469 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:22:46,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:22:46,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:22:46,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:22:46,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:22:46,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:22:46,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:22:46,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:22:46,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:46,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:22:46,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:22:46,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:22:46,471 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:22:46,472 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:46,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:22:46,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:22:46,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:22:46,473 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_ff153ad2-b8e9-4df2-b835-391973b3a64c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ece4fa184f09e2184919c279a0198f8db6972fb16f8b142297bd588b2043b23f [2021-11-07 01:22:46,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:22:46,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:22:46,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:22:46,991 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:22:46,992 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:22:46,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product17.cil.c [2021-11-07 01:22:47,076 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/data/5ffeef9a1/e1d4f3d2e6434d60b166216d62e15e5c/FLAG5a0517c11 [2021-11-07 01:22:47,836 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:22:47,837 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/sv-benchmarks/c/product-lines/email_spec3_product17.cil.c [2021-11-07 01:22:47,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/data/5ffeef9a1/e1d4f3d2e6434d60b166216d62e15e5c/FLAG5a0517c11 [2021-11-07 01:22:48,000 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/data/5ffeef9a1/e1d4f3d2e6434d60b166216d62e15e5c [2021-11-07 01:22:48,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:22:48,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:22:48,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:48,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:22:48,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:22:48,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:48" (1/1) ... [2021-11-07 01:22:48,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589d44f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:48, skipping insertion in model container [2021-11-07 01:22:48,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:48" (1/1) ... [2021-11-07 01:22:48,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:22:48,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:48,878 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_ff153ad2-b8e9-4df2-b835-391973b3a64c/sv-benchmarks/c/product-lines/email_spec3_product17.cil.c[63718,63731] [2021-11-07 01:22:48,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:48,915 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:22:48,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:49,144 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_ff153ad2-b8e9-4df2-b835-391973b3a64c/sv-benchmarks/c/product-lines/email_spec3_product17.cil.c[63718,63731] [2021-11-07 01:22:49,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:49,157 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:22:49,321 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_ff153ad2-b8e9-4df2-b835-391973b3a64c/sv-benchmarks/c/product-lines/email_spec3_product17.cil.c[63718,63731] [2021-11-07 01:22:49,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:49,377 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:22:49,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:49 WrapperNode [2021-11-07 01:22:49,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:49,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:49,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:22:49,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:22:49,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:49" (1/1) ... [2021-11-07 01:22:49,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:49" (1/1) ... [2021-11-07 01:22:49,626 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:49,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:22:49,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:22:49,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:22:49,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:49" (1/1) ... [2021-11-07 01:22:49,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:49" (1/1) ... [2021-11-07 01:22:49,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:49" (1/1) ... [2021-11-07 01:22:49,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:49" (1/1) ... [2021-11-07 01:22:49,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:49" (1/1) ... [2021-11-07 01:22:49,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:49" (1/1) ... [2021-11-07 01:22:49,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:49" (1/1) ... [2021-11-07 01:22:49,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:22:49,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:22:49,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:22:49,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:22:49,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:49" (1/1) ... [2021-11-07 01:22:49,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:49,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:22:49,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:22:49,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:22:49,953 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:22:49,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:22:49,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:22:49,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:22:49,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:22:55,634 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:22:55,635 INFO L299 CfgBuilder]: Removed 497 assume(true) statements. [2021-11-07 01:22:55,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:55 BoogieIcfgContainer [2021-11-07 01:22:55,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:22:55,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:22:55,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:22:55,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:22:55,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:22:48" (1/3) ... [2021-11-07 01:22:55,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bcb2488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:55, skipping insertion in model container [2021-11-07 01:22:55,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:49" (2/3) ... [2021-11-07 01:22:55,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bcb2488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:55, skipping insertion in model container [2021-11-07 01:22:55,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:55" (3/3) ... [2021-11-07 01:22:55,649 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product17.cil.c [2021-11-07 01:22:55,655 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:22:55,655 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-07 01:22:55,723 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:22:55,729 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 01:22:55,730 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-07 01:22:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 836 states, 823 states have (on average 1.7727825030376672) internal successors, (1459), 835 states have internal predecessors, (1459), 0 states have call successors, (0), 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 01:22:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:22:55,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:55,808 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] [2021-11-07 01:22:55,810 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:22:55,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:55,819 INFO L85 PathProgramCache]: Analyzing trace with hash 51713010, now seen corresponding path program 1 times [2021-11-07 01:22:55,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:55,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624022590] [2021-11-07 01:22:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:55,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:55,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:55,839 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:55,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:22:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:56,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:22:56,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:56,589 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 01:22:56,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:56,731 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 01:22:56,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:56,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624022590] [2021-11-07 01:22:56,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624022590] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:56,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:56,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:22:56,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380424437] [2021-11-07 01:22:56,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:22:56,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:56,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:22:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:22:56,766 INFO L87 Difference]: Start difference. First operand has 836 states, 823 states have (on average 1.7727825030376672) internal successors, (1459), 835 states have internal predecessors, (1459), 0 states have call successors, (0), 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 24.5) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 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 01:22:56,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:56,862 INFO L93 Difference]: Finished difference Result 1391 states and 2402 transitions. [2021-11-07 01:22:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:22:56,864 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-07 01:22:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:56,891 INFO L225 Difference]: With dead ends: 1391 [2021-11-07 01:22:56,892 INFO L226 Difference]: Without dead ends: 768 [2021-11-07 01:22:56,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:22:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-11-07 01:22:57,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 768. [2021-11-07 01:22:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 756 states have (on average 1.753968253968254) internal successors, (1326), 767 states have internal predecessors, (1326), 0 states have call successors, (0), 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 01:22:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1326 transitions. [2021-11-07 01:22:57,019 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1326 transitions. Word has length 49 [2021-11-07 01:22:57,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:57,020 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1326 transitions. [2021-11-07 01:22:57,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 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 01:22:57,021 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1326 transitions. [2021-11-07 01:22:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:22:57,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:57,033 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:57,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:22:57,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:57,255 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:22:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1215639707, now seen corresponding path program 1 times [2021-11-07 01:22:57,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:57,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577210014] [2021-11-07 01:22:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:57,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:57,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:57,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:57,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:22:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:22:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:57,986 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 01:22:57,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:58,154 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 01:22:58,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:58,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577210014] [2021-11-07 01:22:58,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577210014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:58,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:58,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:22:58,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137438874] [2021-11-07 01:22:58,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:58,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:58,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:58,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:58,165 INFO L87 Difference]: Start difference. First operand 768 states and 1326 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:58,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:58,311 INFO L93 Difference]: Finished difference Result 2274 states and 3930 transitions. [2021-11-07 01:22:58,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:58,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:22:58,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:58,326 INFO L225 Difference]: With dead ends: 2274 [2021-11-07 01:22:58,326 INFO L226 Difference]: Without dead ends: 1521 [2021-11-07 01:22:58,329 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:58,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-11-07 01:22:58,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 767. [2021-11-07 01:22:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 755 states have (on average 1.7496688741721855) internal successors, (1321), 766 states have internal predecessors, (1321), 0 states have call successors, (0), 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 01:22:58,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1321 transitions. [2021-11-07 01:22:58,391 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1321 transitions. Word has length 50 [2021-11-07 01:22:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:58,392 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 1321 transitions. [2021-11-07 01:22:58,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1321 transitions. [2021-11-07 01:22:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:22:58,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:58,402 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] [2021-11-07 01:22:58,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:58,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:58,615 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:22:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:58,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2024499009, now seen corresponding path program 1 times [2021-11-07 01:22:58,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:58,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998115833] [2021-11-07 01:22:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:58,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:58,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:58,620 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:58,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:22:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:59,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:22:59,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:59,263 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 01:22:59,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:59,443 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 01:22:59,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:59,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998115833] [2021-11-07 01:22:59,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998115833] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:59,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:59,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:22:59,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352160916] [2021-11-07 01:22:59,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:22:59,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:59,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:22:59,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:22:59,447 INFO L87 Difference]: Start difference. First operand 767 states and 1321 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:59,783 INFO L93 Difference]: Finished difference Result 2985 states and 5146 transitions. [2021-11-07 01:22:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:22:59,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:22:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:59,798 INFO L225 Difference]: With dead ends: 2985 [2021-11-07 01:22:59,798 INFO L226 Difference]: Without dead ends: 2236 [2021-11-07 01:22:59,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 98 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 01:22:59,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-11-07 01:22:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 766. [2021-11-07 01:22:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 754 states have (on average 1.746684350132626) internal successors, (1317), 765 states have internal predecessors, (1317), 0 states have call successors, (0), 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 01:22:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1317 transitions. [2021-11-07 01:22:59,855 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1317 transitions. Word has length 52 [2021-11-07 01:22:59,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:59,856 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 1317 transitions. [2021-11-07 01:22:59,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1317 transitions. [2021-11-07 01:22:59,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:22:59,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:59,858 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:59,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:00,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:00,075 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:00,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:00,076 INFO L85 PathProgramCache]: Analyzing trace with hash 979326860, now seen corresponding path program 1 times [2021-11-07 01:23:00,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:00,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776461254] [2021-11-07 01:23:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:00,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:00,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:00,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:00,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:23:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:00,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:23:00,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:00,692 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 01:23:00,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:00,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:00,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776461254] [2021-11-07 01:23:00,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776461254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:00,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:00,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:23:00,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427784319] [2021-11-07 01:23:00,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:23:00,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:00,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:23:00,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:23:00,885 INFO L87 Difference]: Start difference. First operand 766 states and 1317 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 01:23:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:01,011 INFO L93 Difference]: Finished difference Result 1529 states and 2631 transitions. [2021-11-07 01:23:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:23:01,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:23:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:01,018 INFO L225 Difference]: With dead ends: 1529 [2021-11-07 01:23:01,019 INFO L226 Difference]: Without dead ends: 771 [2021-11-07 01:23:01,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 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 01:23:01,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-11-07 01:23:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 766. [2021-11-07 01:23:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 754 states have (on average 1.742705570291777) internal successors, (1314), 765 states have internal predecessors, (1314), 0 states have call successors, (0), 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 01:23:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1314 transitions. [2021-11-07 01:23:01,079 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1314 transitions. Word has length 53 [2021-11-07 01:23:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:01,080 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 1314 transitions. [2021-11-07 01:23:01,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 01:23:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1314 transitions. [2021-11-07 01:23:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:23:01,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:01,082 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:01,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:01,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:01,296 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:01,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1013024041, now seen corresponding path program 1 times [2021-11-07 01:23:01,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:01,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124349349] [2021-11-07 01:23:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:01,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:01,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:01,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:01,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:23:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:01,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:23:01,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:02,084 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 01:23:02,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:02,289 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 01:23:02,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:02,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124349349] [2021-11-07 01:23:02,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124349349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:02,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:02,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:23:02,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96622507] [2021-11-07 01:23:02,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:23:02,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:02,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:23:02,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:23:02,292 INFO L87 Difference]: Start difference. First operand 766 states and 1314 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:02,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:02,730 INFO L93 Difference]: Finished difference Result 2972 states and 5122 transitions. [2021-11-07 01:23:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:23:02,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:23:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:02,749 INFO L225 Difference]: With dead ends: 2972 [2021-11-07 01:23:02,749 INFO L226 Difference]: Without dead ends: 2232 [2021-11-07 01:23:02,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 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 01:23:02,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-11-07 01:23:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 766. [2021-11-07 01:23:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 754 states have (on average 1.7387267904509285) internal successors, (1311), 765 states have internal predecessors, (1311), 0 states have call successors, (0), 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 01:23:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1311 transitions. [2021-11-07 01:23:02,837 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1311 transitions. Word has length 54 [2021-11-07 01:23:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:02,837 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 1311 transitions. [2021-11-07 01:23:02,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:02,838 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1311 transitions. [2021-11-07 01:23:02,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:23:02,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:02,840 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 01:23:02,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:03,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:03,058 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:03,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:03,058 INFO L85 PathProgramCache]: Analyzing trace with hash -222983876, now seen corresponding path program 1 times [2021-11-07 01:23:03,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:03,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409463966] [2021-11-07 01:23:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:03,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:03,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:03,061 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:03,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:23:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:03,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:03,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:03,718 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 01:23:03,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:03,858 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 01:23:03,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:03,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409463966] [2021-11-07 01:23:03,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409463966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:03,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:03,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:23:03,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74425610] [2021-11-07 01:23:03,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:23:03,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:03,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:23:03,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:23:03,862 INFO L87 Difference]: Start difference. First operand 766 states and 1311 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 01:23:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:04,027 INFO L93 Difference]: Finished difference Result 1993 states and 3405 transitions. [2021-11-07 01:23:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:23:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 01:23:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:04,038 INFO L225 Difference]: With dead ends: 1993 [2021-11-07 01:23:04,038 INFO L226 Difference]: Without dead ends: 1506 [2021-11-07 01:23:04,039 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 01:23:04,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-07 01:23:04,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1019. [2021-11-07 01:23:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1007 states have (on average 1.7646474677259185) internal successors, (1777), 1018 states have internal predecessors, (1777), 0 states have call successors, (0), 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 01:23:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1777 transitions. [2021-11-07 01:23:04,120 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1777 transitions. Word has length 56 [2021-11-07 01:23:04,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:04,120 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 1777 transitions. [2021-11-07 01:23:04,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 01:23:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1777 transitions. [2021-11-07 01:23:04,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:23:04,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:04,123 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] [2021-11-07 01:23:04,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:04,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:04,337 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:04,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:04,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1900173781, now seen corresponding path program 1 times [2021-11-07 01:23:04,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:04,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592092401] [2021-11-07 01:23:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:04,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:04,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:04,340 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:04,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:23:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:04,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:04,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:04,983 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 01:23:04,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:05,172 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 01:23:05,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:05,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592092401] [2021-11-07 01:23:05,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592092401] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:05,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:05,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:23:05,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305842663] [2021-11-07 01:23:05,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:05,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:05,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:05,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:05,174 INFO L87 Difference]: Start difference. First operand 1019 states and 1777 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 01:23:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:05,331 INFO L93 Difference]: Finished difference Result 2642 states and 4604 transitions. [2021-11-07 01:23:05,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:05,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:23:05,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:05,346 INFO L225 Difference]: With dead ends: 2642 [2021-11-07 01:23:05,346 INFO L226 Difference]: Without dead ends: 1707 [2021-11-07 01:23:05,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 01:23:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-11-07 01:23:05,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1220. [2021-11-07 01:23:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1208 states have (on average 1.7764900662251655) internal successors, (2146), 1219 states have internal predecessors, (2146), 0 states have call successors, (0), 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 01:23:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 2146 transitions. [2021-11-07 01:23:05,483 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 2146 transitions. Word has length 68 [2021-11-07 01:23:05,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:05,484 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 2146 transitions. [2021-11-07 01:23:05,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 01:23:05,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 2146 transitions. [2021-11-07 01:23:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:23:05,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:05,487 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:05,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:05,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:05,706 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -669311572, now seen corresponding path program 1 times [2021-11-07 01:23:05,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:05,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657279200] [2021-11-07 01:23:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:05,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:05,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:05,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:05,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:23:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:06,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:06,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:06,528 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 01:23:06,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:06,727 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 01:23:06,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:06,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657279200] [2021-11-07 01:23:06,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657279200] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:06,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:06,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:23:06,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693630178] [2021-11-07 01:23:06,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:06,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:06,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:06,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:06,730 INFO L87 Difference]: Start difference. First operand 1220 states and 2146 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:06,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:06,932 INFO L93 Difference]: Finished difference Result 3289 states and 5797 transitions. [2021-11-07 01:23:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:06,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:23:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:06,949 INFO L225 Difference]: With dead ends: 3289 [2021-11-07 01:23:06,949 INFO L226 Difference]: Without dead ends: 2157 [2021-11-07 01:23:06,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-11-07 01:23:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1670. [2021-11-07 01:23:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1658 states have (on average 1.7937273823884199) internal successors, (2974), 1669 states have internal predecessors, (2974), 0 states have call successors, (0), 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 01:23:07,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2974 transitions. [2021-11-07 01:23:07,109 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2974 transitions. Word has length 69 [2021-11-07 01:23:07,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:07,109 INFO L470 AbstractCegarLoop]: Abstraction has 1670 states and 2974 transitions. [2021-11-07 01:23:07,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:07,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2974 transitions. [2021-11-07 01:23:07,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:23:07,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:07,114 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:23:07,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:07,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:07,328 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:07,329 INFO L85 PathProgramCache]: Analyzing trace with hash 93515740, now seen corresponding path program 1 times [2021-11-07 01:23:07,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:07,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628952282] [2021-11-07 01:23:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:07,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:07,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:07,332 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:07,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:23:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:07,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:07,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:08,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:08,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:08,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628952282] [2021-11-07 01:23:08,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628952282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:08,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:08,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:23:08,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279133495] [2021-11-07 01:23:08,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:23:08,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:08,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:23:08,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:23:08,297 INFO L87 Difference]: Start difference. First operand 1670 states and 2974 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 01:23:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:08,456 INFO L93 Difference]: Finished difference Result 3542 states and 6260 transitions. [2021-11-07 01:23:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:08,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 70 [2021-11-07 01:23:08,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:08,470 INFO L225 Difference]: With dead ends: 3542 [2021-11-07 01:23:08,470 INFO L226 Difference]: Without dead ends: 2157 [2021-11-07 01:23:08,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 136 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 01:23:08,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-11-07 01:23:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1670. [2021-11-07 01:23:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1658 states have (on average 1.7925211097708083) internal successors, (2972), 1669 states have internal predecessors, (2972), 0 states have call successors, (0), 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 01:23:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2972 transitions. [2021-11-07 01:23:08,601 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2972 transitions. Word has length 70 [2021-11-07 01:23:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:08,601 INFO L470 AbstractCegarLoop]: Abstraction has 1670 states and 2972 transitions. [2021-11-07 01:23:08,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 01:23:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2972 transitions. [2021-11-07 01:23:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:23:08,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:08,605 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:08,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:08,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:08,820 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:08,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1216387395, now seen corresponding path program 1 times [2021-11-07 01:23:08,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:08,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483636822] [2021-11-07 01:23:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:08,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:08,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:08,822 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:08,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:23:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:09,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:09,482 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 01:23:09,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:09,618 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 01:23:09,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:09,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483636822] [2021-11-07 01:23:09,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483636822] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:09,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:09,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:23:09,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246603396] [2021-11-07 01:23:09,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:09,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:09,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:09,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:09,621 INFO L87 Difference]: Start difference. First operand 1670 states and 2972 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:09,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:09,890 INFO L93 Difference]: Finished difference Result 4611 states and 8230 transitions. [2021-11-07 01:23:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:09,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:23:09,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:09,915 INFO L225 Difference]: With dead ends: 4611 [2021-11-07 01:23:09,915 INFO L226 Difference]: Without dead ends: 3037 [2021-11-07 01:23:09,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-11-07 01:23:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2550. [2021-11-07 01:23:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2538 states have (on average 1.8089046493301812) internal successors, (4591), 2549 states have internal predecessors, (4591), 0 states have call successors, (0), 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 01:23:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 4591 transitions. [2021-11-07 01:23:10,159 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 4591 transitions. Word has length 70 [2021-11-07 01:23:10,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:10,159 INFO L470 AbstractCegarLoop]: Abstraction has 2550 states and 4591 transitions. [2021-11-07 01:23:10,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:10,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 4591 transitions. [2021-11-07 01:23:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:23:10,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:10,169 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:10,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:10,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:10,384 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:10,385 INFO L85 PathProgramCache]: Analyzing trace with hash 812927018, now seen corresponding path program 1 times [2021-11-07 01:23:10,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:10,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683026818] [2021-11-07 01:23:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:10,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:10,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:10,387 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:10,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:23:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:11,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:11,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:11,241 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 01:23:11,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:11,450 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 01:23:11,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:11,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683026818] [2021-11-07 01:23:11,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683026818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:11,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:11,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:23:11,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379465100] [2021-11-07 01:23:11,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:11,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:11,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:11,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:11,461 INFO L87 Difference]: Start difference. First operand 2550 states and 4591 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:11,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:11,782 INFO L93 Difference]: Finished difference Result 6987 states and 12606 transitions. [2021-11-07 01:23:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:11,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:23:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:11,843 INFO L225 Difference]: With dead ends: 6987 [2021-11-07 01:23:11,844 INFO L226 Difference]: Without dead ends: 4567 [2021-11-07 01:23:11,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2021-11-07 01:23:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 4080. [2021-11-07 01:23:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4080 states, 4068 states have (on average 1.8200589970501475) internal successors, (7404), 4079 states have internal predecessors, (7404), 0 states have call successors, (0), 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 01:23:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4080 states to 4080 states and 7404 transitions. [2021-11-07 01:23:12,180 INFO L78 Accepts]: Start accepts. Automaton has 4080 states and 7404 transitions. Word has length 71 [2021-11-07 01:23:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:12,182 INFO L470 AbstractCegarLoop]: Abstraction has 4080 states and 7404 transitions. [2021-11-07 01:23:12,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4080 states and 7404 transitions. [2021-11-07 01:23:12,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:23:12,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:12,192 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:12,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:12,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:12,412 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:12,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:12,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1632823500, now seen corresponding path program 1 times [2021-11-07 01:23:12,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:12,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457875048] [2021-11-07 01:23:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:12,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:12,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:12,415 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:12,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:23:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:12,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:12,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:13,130 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 01:23:13,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:13,295 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 01:23:13,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:13,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457875048] [2021-11-07 01:23:13,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457875048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:13,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:13,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:23:13,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687567358] [2021-11-07 01:23:13,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:13,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:13,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:13,297 INFO L87 Difference]: Start difference. First operand 4080 states and 7404 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:13,697 INFO L93 Difference]: Finished difference Result 11293 states and 20528 transitions. [2021-11-07 01:23:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:13,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:23:13,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:13,723 INFO L225 Difference]: With dead ends: 11293 [2021-11-07 01:23:13,723 INFO L226 Difference]: Without dead ends: 7377 [2021-11-07 01:23:13,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7377 states. [2021-11-07 01:23:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7377 to 6890. [2021-11-07 01:23:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6890 states, 6878 states have (on average 1.8268391974411167) internal successors, (12565), 6889 states have internal predecessors, (12565), 0 states have call successors, (0), 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 01:23:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6890 states to 6890 states and 12565 transitions. [2021-11-07 01:23:14,217 INFO L78 Accepts]: Start accepts. Automaton has 6890 states and 12565 transitions. Word has length 72 [2021-11-07 01:23:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:14,217 INFO L470 AbstractCegarLoop]: Abstraction has 6890 states and 12565 transitions. [2021-11-07 01:23:14,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:14,218 INFO L276 IsEmpty]: Start isEmpty. Operand 6890 states and 12565 transitions. [2021-11-07 01:23:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:23:14,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:14,225 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] [2021-11-07 01:23:14,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:14,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:14,440 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:14,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:14,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1423771400, now seen corresponding path program 1 times [2021-11-07 01:23:14,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:14,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526952497] [2021-11-07 01:23:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:14,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:14,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:14,444 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:14,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:23:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:15,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:23:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:15,317 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 01:23:15,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:15,555 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 01:23:15,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:15,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526952497] [2021-11-07 01:23:15,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526952497] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:15,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:15,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:23:15,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160842719] [2021-11-07 01:23:15,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:23:15,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:15,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:23:15,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:23:15,557 INFO L87 Difference]: Start difference. First operand 6890 states and 12565 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 01:23:18,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:18,740 INFO L93 Difference]: Finished difference Result 26083 states and 47616 transitions. [2021-11-07 01:23:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:23:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:23:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:18,812 INFO L225 Difference]: With dead ends: 26083 [2021-11-07 01:23:18,813 INFO L226 Difference]: Without dead ends: 19476 [2021-11-07 01:23:18,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 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 01:23:18,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19476 states. [2021-11-07 01:23:19,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19476 to 6840. [2021-11-07 01:23:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6828 states have (on average 1.8109256004686585) internal successors, (12365), 6839 states have internal predecessors, (12365), 0 states have call successors, (0), 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 01:23:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 12365 transitions. [2021-11-07 01:23:19,528 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 12365 transitions. Word has length 73 [2021-11-07 01:23:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:19,529 INFO L470 AbstractCegarLoop]: Abstraction has 6840 states and 12365 transitions. [2021-11-07 01:23:19,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 01:23:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 12365 transitions. [2021-11-07 01:23:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:23:19,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:19,539 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:19,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:19,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:19,752 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:19,753 INFO L85 PathProgramCache]: Analyzing trace with hash -601427943, now seen corresponding path program 1 times [2021-11-07 01:23:19,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:19,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776513229] [2021-11-07 01:23:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:19,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:19,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:19,755 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:19,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:23:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:20,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:20,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:20,669 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 01:23:20,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:20,826 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 01:23:20,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:20,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776513229] [2021-11-07 01:23:20,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776513229] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:20,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:20,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:23:20,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584197877] [2021-11-07 01:23:20,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:20,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:20,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:20,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:20,828 INFO L87 Difference]: Start difference. First operand 6840 states and 12365 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:21,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:21,383 INFO L93 Difference]: Finished difference Result 20034 states and 36265 transitions. [2021-11-07 01:23:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:21,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:23:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:21,414 INFO L225 Difference]: With dead ends: 20034 [2021-11-07 01:23:21,414 INFO L226 Difference]: Without dead ends: 13361 [2021-11-07 01:23:21,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:21,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13361 states. [2021-11-07 01:23:22,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13361 to 12874. [2021-11-07 01:23:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12874 states, 12862 states have (on average 1.8135593220338984) internal successors, (23326), 12873 states have internal predecessors, (23326), 0 states have call successors, (0), 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 01:23:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12874 states to 12874 states and 23326 transitions. [2021-11-07 01:23:22,126 INFO L78 Accepts]: Start accepts. Automaton has 12874 states and 23326 transitions. Word has length 73 [2021-11-07 01:23:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:22,127 INFO L470 AbstractCegarLoop]: Abstraction has 12874 states and 23326 transitions. [2021-11-07 01:23:22,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 12874 states and 23326 transitions. [2021-11-07 01:23:22,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:23:22,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:22,139 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] [2021-11-07 01:23:22,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:22,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:22,362 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:22,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:22,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1982042259, now seen corresponding path program 1 times [2021-11-07 01:23:22,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:22,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693870255] [2021-11-07 01:23:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:22,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:22,365 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:22,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:23:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:23,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:23:23,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:23,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:23,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:23,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693870255] [2021-11-07 01:23:23,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693870255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:23:23,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1576450447] [2021-11-07 01:23:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:23,631 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:23,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:23:23,636 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:23:23,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:23:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:24,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:23:24,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:23:24,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:23:25,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1576450447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:25,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:23:25,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:23:25,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086400349] [2021-11-07 01:23:25,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:23:25,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:25,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:23:25,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:23:25,233 INFO L87 Difference]: Start difference. First operand 12874 states and 23326 transitions. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 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 01:23:31,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:31,336 INFO L93 Difference]: Finished difference Result 79554 states and 144275 transitions. [2021-11-07 01:23:31,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:23:31,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 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 01:23:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:31,541 INFO L225 Difference]: With dead ends: 79554 [2021-11-07 01:23:31,541 INFO L226 Difference]: Without dead ends: 79085 [2021-11-07 01:23:31,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:23:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79085 states. [2021-11-07 01:23:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79085 to 25524. [2021-11-07 01:23:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25524 states, 25512 states have (on average 1.8145970523675132) internal successors, (46294), 25523 states have internal predecessors, (46294), 0 states have call successors, (0), 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 01:23:33,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25524 states to 25524 states and 46294 transitions. [2021-11-07 01:23:33,679 INFO L78 Accepts]: Start accepts. Automaton has 25524 states and 46294 transitions. Word has length 74 [2021-11-07 01:23:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:33,679 INFO L470 AbstractCegarLoop]: Abstraction has 25524 states and 46294 transitions. [2021-11-07 01:23:33,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 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 01:23:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 25524 states and 46294 transitions. [2021-11-07 01:23:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:23:33,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:33,706 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] [2021-11-07 01:23:33,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:33,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 01:23:34,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:34,120 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:34,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:34,121 INFO L85 PathProgramCache]: Analyzing trace with hash -153990134, now seen corresponding path program 1 times [2021-11-07 01:23:34,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:34,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779975238] [2021-11-07 01:23:34,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:34,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:34,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:34,123 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:34,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:23:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:35,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:23:35,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:35,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:35,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:35,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779975238] [2021-11-07 01:23:35,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779975238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:23:35,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [989456222] [2021-11-07 01:23:35,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:35,532 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:35,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:23:35,533 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:23:35,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:23:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:36,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:23:36,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:23:36,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:23:36,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [989456222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:36,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:23:36,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:23:36,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14637908] [2021-11-07 01:23:36,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:23:36,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:36,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:23:36,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:23:36,865 INFO L87 Difference]: Start difference. First operand 25524 states and 46294 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:40,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:40,362 INFO L93 Difference]: Finished difference Result 26462 states and 47873 transitions. [2021-11-07 01:23:40,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:23:40,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:23:40,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:40,404 INFO L225 Difference]: With dead ends: 26462 [2021-11-07 01:23:40,405 INFO L226 Difference]: Without dead ends: 25720 [2021-11-07 01:23:40,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:23:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25720 states. [2021-11-07 01:23:41,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25720 to 25518. [2021-11-07 01:23:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25518 states, 25506 states have (on average 1.8145142319454246) internal successors, (46281), 25517 states have internal predecessors, (46281), 0 states have call successors, (0), 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 01:23:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25518 states to 25518 states and 46281 transitions. [2021-11-07 01:23:41,955 INFO L78 Accepts]: Start accepts. Automaton has 25518 states and 46281 transitions. Word has length 75 [2021-11-07 01:23:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:41,955 INFO L470 AbstractCegarLoop]: Abstraction has 25518 states and 46281 transitions. [2021-11-07 01:23:41,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 25518 states and 46281 transitions. [2021-11-07 01:23:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:23:41,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:41,973 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] [2021-11-07 01:23:41,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:42,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:42,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:42,378 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:42,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:42,379 INFO L85 PathProgramCache]: Analyzing trace with hash -385151142, now seen corresponding path program 1 times [2021-11-07 01:23:42,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:42,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619993903] [2021-11-07 01:23:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:42,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:42,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:42,381 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:42,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:23:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:43,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:23:43,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:23:43,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:23:43,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:43,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619993903] [2021-11-07 01:23:43,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619993903] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:43,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:43,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:23:43,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075177430] [2021-11-07 01:23:43,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:23:43,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:43,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:23:43,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:23:43,614 INFO L87 Difference]: Start difference. First operand 25518 states and 46281 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:44,844 INFO L93 Difference]: Finished difference Result 50210 states and 91265 transitions. [2021-11-07 01:23:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:23:44,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:23:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:44,878 INFO L225 Difference]: With dead ends: 50210 [2021-11-07 01:23:44,878 INFO L226 Difference]: Without dead ends: 24978 [2021-11-07 01:23:44,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:23:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24978 states. [2021-11-07 01:23:45,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24978 to 12872. [2021-11-07 01:23:45,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12872 states, 12860 states have (on average 1.8131415241057542) internal successors, (23317), 12871 states have internal predecessors, (23317), 0 states have call successors, (0), 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 01:23:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12872 states to 12872 states and 23317 transitions. [2021-11-07 01:23:45,785 INFO L78 Accepts]: Start accepts. Automaton has 12872 states and 23317 transitions. Word has length 75 [2021-11-07 01:23:45,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:45,785 INFO L470 AbstractCegarLoop]: Abstraction has 12872 states and 23317 transitions. [2021-11-07 01:23:45,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 12872 states and 23317 transitions. [2021-11-07 01:23:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:23:45,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:45,795 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:45,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:46,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:46,015 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:23:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:46,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1696223068, now seen corresponding path program 1 times [2021-11-07 01:23:46,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:46,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198824203] [2021-11-07 01:23:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:46,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:46,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:46,017 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:46,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:23:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:46,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:23:46,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:47,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:47,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:47,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198824203] [2021-11-07 01:23:47,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198824203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:23:47,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1354563406] [2021-11-07 01:23:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:47,286 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:47,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:23:47,288 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:23:47,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:23:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:48,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:23:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:23:49,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:23:49,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1354563406] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:49,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:23:49,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:23:49,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497362527] [2021-11-07 01:23:49,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:23:49,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:49,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:23:49,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:23:49,774 INFO L87 Difference]: Start difference. First operand 12872 states and 23317 transitions. Second operand has 18 states, 18 states have (on average 7.722222222222222) internal successors, (139), 17 states have internal predecessors, (139), 0 states have call successors, (0), 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 01:24:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:18,753 INFO L93 Difference]: Finished difference Result 42766 states and 76585 transitions. [2021-11-07 01:24:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 01:24:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.722222222222222) internal successors, (139), 17 states have internal predecessors, (139), 0 states have call successors, (0), 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 01:24:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:18,823 INFO L225 Difference]: With dead ends: 42766 [2021-11-07 01:24:18,823 INFO L226 Difference]: Without dead ends: 42375 [2021-11-07 01:24:18,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=767, Invalid=2655, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 01:24:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42375 states. [2021-11-07 01:24:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42375 to 26061. [2021-11-07 01:24:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26061 states, 26049 states have (on average 1.8119313601289877) internal successors, (47199), 26060 states have internal predecessors, (47199), 0 states have call successors, (0), 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 01:24:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26061 states to 26061 states and 47199 transitions. [2021-11-07 01:24:20,889 INFO L78 Accepts]: Start accepts. Automaton has 26061 states and 47199 transitions. Word has length 77 [2021-11-07 01:24:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:20,889 INFO L470 AbstractCegarLoop]: Abstraction has 26061 states and 47199 transitions. [2021-11-07 01:24:20,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.722222222222222) internal successors, (139), 17 states have internal predecessors, (139), 0 states have call successors, (0), 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 01:24:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 26061 states and 47199 transitions. [2021-11-07 01:24:20,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:24:20,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:20,905 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:20,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:21,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:21,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:21,321 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:24:21,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:21,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1408961721, now seen corresponding path program 1 times [2021-11-07 01:24:21,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:21,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866053859] [2021-11-07 01:24:21,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:21,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:21,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:21,323 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:21,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:24:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:22,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:24:22,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:22,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:22,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:22,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866053859] [2021-11-07 01:24:22,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866053859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:24:22,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [730807440] [2021-11-07 01:24:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:22,742 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:22,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:24:22,744 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:24:22,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:24:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:23,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:24:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:24:24,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:24:24,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [730807440] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:24,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:24:24,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 15 [2021-11-07 01:24:24,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753363075] [2021-11-07 01:24:24,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:24:24,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:24,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:24:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:24:24,474 INFO L87 Difference]: Start difference. First operand 26061 states and 47199 transitions. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:32,516 INFO L93 Difference]: Finished difference Result 34073 states and 60455 transitions. [2021-11-07 01:24:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 01:24:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:24:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:32,566 INFO L225 Difference]: With dead ends: 34073 [2021-11-07 01:24:32,566 INFO L226 Difference]: Without dead ends: 32986 [2021-11-07 01:24:32,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:24:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32986 states. [2021-11-07 01:24:34,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32986 to 27360. [2021-11-07 01:24:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27360 states, 27348 states have (on average 1.806201550387597) internal successors, (49396), 27359 states have internal predecessors, (49396), 0 states have call successors, (0), 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 01:24:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27360 states to 27360 states and 49396 transitions. [2021-11-07 01:24:34,336 INFO L78 Accepts]: Start accepts. Automaton has 27360 states and 49396 transitions. Word has length 78 [2021-11-07 01:24:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:34,336 INFO L470 AbstractCegarLoop]: Abstraction has 27360 states and 49396 transitions. [2021-11-07 01:24:34,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 27360 states and 49396 transitions. [2021-11-07 01:24:34,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:24:34,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:34,353 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:34,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:34,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-07 01:24:34,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:34,754 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:24:34,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:34,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1397164485, now seen corresponding path program 1 times [2021-11-07 01:24:34,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:34,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895427038] [2021-11-07 01:24:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:34,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:34,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:34,755 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:34,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:24:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:35,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:24:35,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:36,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:36,260 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:36,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895427038] [2021-11-07 01:24:36,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895427038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:24:36,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [62571203] [2021-11-07 01:24:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:36,262 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:36,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:24:36,278 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:24:36,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:24:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:37,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:24:37,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:24:38,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:24:39,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [62571203] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:39,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:24:39,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:24:39,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295480980] [2021-11-07 01:24:39,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:24:39,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:24:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:24:39,219 INFO L87 Difference]: Start difference. First operand 27360 states and 49396 transitions. Second operand has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 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 01:25:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:07,529 INFO L93 Difference]: Finished difference Result 82670 states and 146897 transitions. [2021-11-07 01:25:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 01:25:07,530 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 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 01:25:07,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:07,666 INFO L225 Difference]: With dead ends: 82670 [2021-11-07 01:25:07,666 INFO L226 Difference]: Without dead ends: 80804 [2021-11-07 01:25:07,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=767, Invalid=2655, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 01:25:07,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80804 states. [2021-11-07 01:25:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80804 to 55124. [2021-11-07 01:25:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55124 states, 55112 states have (on average 1.80501524168965) internal successors, (99478), 55123 states have internal predecessors, (99478), 0 states have call successors, (0), 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 01:25:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55124 states to 55124 states and 99478 transitions. [2021-11-07 01:25:11,691 INFO L78 Accepts]: Start accepts. Automaton has 55124 states and 99478 transitions. Word has length 78 [2021-11-07 01:25:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:11,691 INFO L470 AbstractCegarLoop]: Abstraction has 55124 states and 99478 transitions. [2021-11-07 01:25:11,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 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 01:25:11,692 INFO L276 IsEmpty]: Start isEmpty. Operand 55124 states and 99478 transitions. [2021-11-07 01:25:11,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:25:11,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:11,719 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] [2021-11-07 01:25:11,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:12,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:12,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 01:25:12,120 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:25:12,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:12,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2028079439, now seen corresponding path program 1 times [2021-11-07 01:25:12,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:12,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749084453] [2021-11-07 01:25:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:12,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:12,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:12,123 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:12,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:25:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:13,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:25:13,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:13,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:13,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:13,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749084453] [2021-11-07 01:25:13,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749084453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:25:13,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [600472394] [2021-11-07 01:25:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:13,766 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:13,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:25:13,767 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:25:13,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:25:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:15,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:25:15,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:25:15,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:25:15,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [600472394] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:15,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:25:15,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:25:15,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44305585] [2021-11-07 01:25:15,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:25:15,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:15,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:25:15,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:25:15,754 INFO L87 Difference]: Start difference. First operand 55124 states and 99478 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:19,445 INFO L93 Difference]: Finished difference Result 59434 states and 106734 transitions. [2021-11-07 01:25:19,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:25:19,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:25:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:19,548 INFO L225 Difference]: With dead ends: 59434 [2021-11-07 01:25:19,548 INFO L226 Difference]: Without dead ends: 56507 [2021-11-07 01:25:19,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:25:19,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56507 states. [2021-11-07 01:25:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56507 to 54492. [2021-11-07 01:25:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54492 states, 54480 states have (on average 1.806057268722467) internal successors, (98394), 54491 states have internal predecessors, (98394), 0 states have call successors, (0), 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 01:25:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54492 states to 54492 states and 98394 transitions. [2021-11-07 01:25:23,593 INFO L78 Accepts]: Start accepts. Automaton has 54492 states and 98394 transitions. Word has length 79 [2021-11-07 01:25:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:23,593 INFO L470 AbstractCegarLoop]: Abstraction has 54492 states and 98394 transitions. [2021-11-07 01:25:23,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 54492 states and 98394 transitions. [2021-11-07 01:25:23,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:25:23,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:23,613 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] [2021-11-07 01:25:23,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:23,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:24,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:24,014 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:25:24,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:24,014 INFO L85 PathProgramCache]: Analyzing trace with hash 363706519, now seen corresponding path program 1 times [2021-11-07 01:25:24,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:24,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563683721] [2021-11-07 01:25:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:24,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:24,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:24,017 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:24,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:25:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:25,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:25:25,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:25,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:25,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:25,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563683721] [2021-11-07 01:25:25,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563683721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:25:25,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1141150986] [2021-11-07 01:25:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:25,606 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:25,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:25:25,607 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:25:25,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:25:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:27,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:25:27,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:27,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:27,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1141150986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:25:27,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270909691] [2021-11-07 01:25:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:27,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:27,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:27,723 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:25:27,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff153ad2-b8e9-4df2-b835-391973b3a64c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 01:25:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:28,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:25:28,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:29,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:29,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270909691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:25:29,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:25:29,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-07 01:25:29,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056778205] [2021-11-07 01:25:29,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:25:29,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:25:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:25:29,362 INFO L87 Difference]: Start difference. First operand 54492 states and 98394 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 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 01:25:36,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:36,323 INFO L93 Difference]: Finished difference Result 96750 states and 172620 transitions. [2021-11-07 01:25:36,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:25:36,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 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 01:25:36,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:36,465 INFO L225 Difference]: With dead ends: 96750 [2021-11-07 01:25:36,465 INFO L226 Difference]: Without dead ends: 91380 [2021-11-07 01:25:36,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:25:36,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91380 states.