./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product23.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_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/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_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/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_ef9edf62-7621-4391-b5c9-b9a31a33abaf/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 c32d742da56eb7f975371d3819f8188d43c88569b223fcc4a7217dc4d57efe24 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:00:50,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:00:50,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:00:50,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:00:50,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:00:50,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:00:50,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:00:50,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:00:50,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:00:50,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:00:50,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:00:50,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:00:50,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:00:50,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:00:50,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:00:50,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:00:50,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:00:50,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:00:50,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:00:50,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:00:50,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:00:50,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:00:50,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:00:50,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:00:50,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:00:50,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:00:50,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:00:50,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:00:50,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:00:50,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:00:50,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:00:50,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:00:50,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:00:50,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:00:50,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:00:50,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:00:50,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:00:50,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:00:50,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:00:50,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:00:50,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:00:50,721 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:00:50,777 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:00:50,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:00:50,779 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:00:50,779 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:00:50,780 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:00:50,780 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:00:50,780 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:00:50,781 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:00:50,781 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:00:50,781 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:00:50,790 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:00:50,790 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:00:50,791 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:00:50,791 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:00:50,791 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:00:50,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:00:50,793 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:00:50,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:00:50,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:00:50,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:00:50,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:00:50,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:00:50,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:00:50,795 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:00:50,795 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:00:50,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:00:50,796 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:00:50,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:00:50,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:00:50,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:00:50,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:50,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:00:50,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:00:50,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:00:50,798 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:00:50,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:00:50,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:00:50,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:00:50,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:00:50,800 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_ef9edf62-7621-4391-b5c9-b9a31a33abaf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c32d742da56eb7f975371d3819f8188d43c88569b223fcc4a7217dc4d57efe24 [2021-11-07 02:00:51,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:00:51,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:00:51,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:00:51,200 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:00:51,201 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:00:51,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product23.cil.c [2021-11-07 02:00:51,287 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/data/0b003dd9b/603deea87a09472187191086282b529e/FLAGf333d7a3c [2021-11-07 02:00:52,160 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:00:52,162 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/sv-benchmarks/c/product-lines/email_spec3_product23.cil.c [2021-11-07 02:00:52,208 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/data/0b003dd9b/603deea87a09472187191086282b529e/FLAGf333d7a3c [2021-11-07 02:00:52,305 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/data/0b003dd9b/603deea87a09472187191086282b529e [2021-11-07 02:00:52,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:00:52,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:00:52,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:52,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:00:52,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:00:52,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:52" (1/1) ... [2021-11-07 02:00:52,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@727e4f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:52, skipping insertion in model container [2021-11-07 02:00:52,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:52" (1/1) ... [2021-11-07 02:00:52,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:00:52,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:00:52,863 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_ef9edf62-7621-4391-b5c9-b9a31a33abaf/sv-benchmarks/c/product-lines/email_spec3_product23.cil.c[22258,22271] [2021-11-07 02:00:53,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:53,191 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 02:00:53,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e99a807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:53, skipping insertion in model container [2021-11-07 02:00:53,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:53,193 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:00:53,196 INFO L168 Benchmark]: Toolchain (without parser) took 883.95 ms. Allocated memory is still 111.1 MB. Free memory was 79.1 MB in the beginning and 73.4 MB in the end (delta: 5.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:00:53,198 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 111.1 MB. Free memory is still 66.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:00:53,200 INFO L168 Benchmark]: CACSL2BoogieTranslator took 880.57 ms. Allocated memory is still 111.1 MB. Free memory was 78.8 MB in the beginning and 73.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:00:53,202 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 111.1 MB. Free memory is still 66.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 880.57 ms. Allocated memory is still 111.1 MB. Free memory was 78.8 MB in the beginning and 73.4 MB in the end (delta: 5.4 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: 628]: 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_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/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_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/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_ef9edf62-7621-4391-b5c9-b9a31a33abaf/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 c32d742da56eb7f975371d3819f8188d43c88569b223fcc4a7217dc4d57efe24 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:00:56,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:00:56,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:00:56,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:00:56,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:00:56,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:00:56,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:00:56,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:00:56,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:00:56,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:00:56,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:00:56,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:00:56,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:00:56,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:00:56,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:00:56,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:00:56,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:00:56,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:00:56,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:00:56,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:00:56,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:00:56,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:00:56,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:00:56,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:00:56,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:00:56,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:00:56,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:00:56,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:00:56,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:00:56,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:00:56,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:00:56,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:00:56,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:00:56,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:00:56,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:00:56,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:00:56,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:00:56,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:00:56,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:00:56,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:00:56,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:00:56,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:00:56,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:00:56,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:00:56,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:00:56,267 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:00:56,267 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:00:56,267 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:00:56,268 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:00:56,268 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:00:56,268 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:00:56,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:00:56,270 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:00:56,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:00:56,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:00:56,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:00:56,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:00:56,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:00:56,272 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:00:56,272 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:00:56,272 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:00:56,272 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:00:56,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:00:56,273 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:00:56,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:00:56,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:00:56,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:00:56,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:00:56,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:56,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:00:56,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:00:56,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:00:56,276 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:00:56,276 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:00:56,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:00:56,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:00:56,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:00:56,278 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_ef9edf62-7621-4391-b5c9-b9a31a33abaf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c32d742da56eb7f975371d3819f8188d43c88569b223fcc4a7217dc4d57efe24 [2021-11-07 02:00:56,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:00:56,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:00:56,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:00:56,760 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:00:56,761 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:00:56,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product23.cil.c [2021-11-07 02:00:56,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/data/6b3c49b53/dfac795129bc4a31a79a68dd00c44644/FLAG396ede941 [2021-11-07 02:00:57,643 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:00:57,644 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/sv-benchmarks/c/product-lines/email_spec3_product23.cil.c [2021-11-07 02:00:57,671 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/data/6b3c49b53/dfac795129bc4a31a79a68dd00c44644/FLAG396ede941 [2021-11-07 02:00:57,758 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/data/6b3c49b53/dfac795129bc4a31a79a68dd00c44644 [2021-11-07 02:00:57,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:00:57,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:00:57,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:57,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:00:57,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:00:57,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:57" (1/1) ... [2021-11-07 02:00:57,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51deebdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:57, skipping insertion in model container [2021-11-07 02:00:57,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:57" (1/1) ... [2021-11-07 02:00:57,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:00:57,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:00:58,471 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_ef9edf62-7621-4391-b5c9-b9a31a33abaf/sv-benchmarks/c/product-lines/email_spec3_product23.cil.c[22258,22271] [2021-11-07 02:00:58,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:58,830 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:00:58,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:00:58,924 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_ef9edf62-7621-4391-b5c9-b9a31a33abaf/sv-benchmarks/c/product-lines/email_spec3_product23.cil.c[22258,22271] [2021-11-07 02:00:58,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:58,989 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:00:59,037 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/sv-benchmarks/c/product-lines/email_spec3_product23.cil.c[22258,22271] [2021-11-07 02:00:59,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:59,156 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:00:59,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:59 WrapperNode [2021-11-07 02:00:59,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:59,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:00:59,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:00:59,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:00:59,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:59" (1/1) ... [2021-11-07 02:00:59,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:59" (1/1) ... [2021-11-07 02:00:59,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:00:59,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:00:59,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:00:59,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:00:59,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:59" (1/1) ... [2021-11-07 02:00:59,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:59" (1/1) ... [2021-11-07 02:00:59,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:59" (1/1) ... [2021-11-07 02:00:59,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:59" (1/1) ... [2021-11-07 02:00:59,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:59" (1/1) ... [2021-11-07 02:00:59,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:59" (1/1) ... [2021-11-07 02:00:59,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:59" (1/1) ... [2021-11-07 02:00:59,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:00:59,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:00:59,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:00:59,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:00:59,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:59" (1/1) ... [2021-11-07 02:00:59,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:59,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:00:59,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:00:59,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:00:59,740 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:00:59,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:00:59,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:00:59,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:00:59,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:01:05,982 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:01:05,982 INFO L299 CfgBuilder]: Removed 573 assume(true) statements. [2021-11-07 02:01:05,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:01:05 BoogieIcfgContainer [2021-11-07 02:01:05,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:01:05,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:01:05,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:01:05,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:01:05,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:00:57" (1/3) ... [2021-11-07 02:01:05,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495e2580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:01:05, skipping insertion in model container [2021-11-07 02:01:05,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:59" (2/3) ... [2021-11-07 02:01:05,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495e2580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:01:05, skipping insertion in model container [2021-11-07 02:01:05,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:01:05" (3/3) ... [2021-11-07 02:01:05,998 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product23.cil.c [2021-11-07 02:01:06,005 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:01:06,006 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-07 02:01:06,091 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:01:06,102 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 02:01:06,103 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-07 02:01:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 912 states, 899 states have (on average 1.764182424916574) internal successors, (1586), 911 states have internal predecessors, (1586), 0 states have call successors, (0), 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 02:01:06,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 02:01:06,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:06,194 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 02:01:06,195 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 02:01:06,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:06,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2089636803, now seen corresponding path program 1 times [2021-11-07 02:01:06,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:06,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256824503] [2021-11-07 02:01:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:06,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:06,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:06,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:06,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:01:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:01:06,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:07,038 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 02:01:07,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:07,256 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 02:01:07,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:07,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256824503] [2021-11-07 02:01:07,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256824503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:07,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:07,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:01:07,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935803941] [2021-11-07 02:01:07,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:01:07,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:07,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:01:07,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:01:07,298 INFO L87 Difference]: Start difference. First operand has 912 states, 899 states have (on average 1.764182424916574) internal successors, (1586), 911 states have internal predecessors, (1586), 0 states have call successors, (0), 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 02:01:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:07,419 INFO L93 Difference]: Finished difference Result 1539 states and 2649 transitions. [2021-11-07 02:01:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:01:07,421 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 02:01:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:07,454 INFO L225 Difference]: With dead ends: 1539 [2021-11-07 02:01:07,454 INFO L226 Difference]: Without dead ends: 820 [2021-11-07 02:01:07,465 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 02:01:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-11-07 02:01:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 820. [2021-11-07 02:01:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 808 states have (on average 1.7487623762376239) internal successors, (1413), 819 states have internal predecessors, (1413), 0 states have call successors, (0), 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 02:01:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1413 transitions. [2021-11-07 02:01:07,594 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1413 transitions. Word has length 49 [2021-11-07 02:01:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:07,595 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1413 transitions. [2021-11-07 02:01:07,595 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 02:01:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1413 transitions. [2021-11-07 02:01:07,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:01:07,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:07,608 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 02:01:07,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:07,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:07,822 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 02:01:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:07,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1662488581, now seen corresponding path program 1 times [2021-11-07 02:01:07,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:07,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129483145] [2021-11-07 02:01:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:07,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:07,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:07,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:07,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:01:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:08,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:01:08,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:08,525 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 02:01:08,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:08,689 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 02:01:08,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:08,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129483145] [2021-11-07 02:01:08,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129483145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:08,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:08,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:01:08,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078892835] [2021-11-07 02:01:08,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:08,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:08,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:08,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:08,698 INFO L87 Difference]: Start difference. First operand 820 states and 1413 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 02:01:08,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:08,910 INFO L93 Difference]: Finished difference Result 2430 states and 4191 transitions. [2021-11-07 02:01:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:08,911 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 02:01:08,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:08,929 INFO L225 Difference]: With dead ends: 2430 [2021-11-07 02:01:08,930 INFO L226 Difference]: Without dead ends: 1625 [2021-11-07 02:01:08,933 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 02:01:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2021-11-07 02:01:08,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 819. [2021-11-07 02:01:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 807 states have (on average 1.744733581164808) internal successors, (1408), 818 states have internal predecessors, (1408), 0 states have call successors, (0), 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 02:01:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1408 transitions. [2021-11-07 02:01:08,999 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1408 transitions. Word has length 50 [2021-11-07 02:01:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:09,001 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1408 transitions. [2021-11-07 02:01:09,002 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 02:01:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1408 transitions. [2021-11-07 02:01:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:01:09,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:09,016 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 02:01:09,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:09,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:09,232 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 02:01:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:09,233 INFO L85 PathProgramCache]: Analyzing trace with hash 853629279, now seen corresponding path program 1 times [2021-11-07 02:01:09,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:09,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737900644] [2021-11-07 02:01:09,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:09,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:09,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:09,243 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:09,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:01:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:01:09,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:09,951 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 02:01:09,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:10,212 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 02:01:10,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:10,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737900644] [2021-11-07 02:01:10,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737900644] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:10,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:10,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:01:10,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928009471] [2021-11-07 02:01:10,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:10,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:10,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:10,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:01:10,224 INFO L87 Difference]: Start difference. First operand 819 states and 1408 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 02:01:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:10,683 INFO L93 Difference]: Finished difference Result 3193 states and 5494 transitions. [2021-11-07 02:01:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:01:10,684 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 02:01:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:10,703 INFO L225 Difference]: With dead ends: 3193 [2021-11-07 02:01:10,703 INFO L226 Difference]: Without dead ends: 2392 [2021-11-07 02:01:10,706 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 02:01:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-11-07 02:01:10,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 818. [2021-11-07 02:01:10,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 806 states have (on average 1.7419354838709677) internal successors, (1404), 817 states have internal predecessors, (1404), 0 states have call successors, (0), 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 02:01:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1404 transitions. [2021-11-07 02:01:10,792 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1404 transitions. Word has length 52 [2021-11-07 02:01:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:10,792 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1404 transitions. [2021-11-07 02:01:10,794 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 02:01:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1404 transitions. [2021-11-07 02:01:10,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:01:10,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:10,798 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:10,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:11,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:11,022 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 02:01:11,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:11,022 INFO L85 PathProgramCache]: Analyzing trace with hash -437512148, now seen corresponding path program 1 times [2021-11-07 02:01:11,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:11,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38242633] [2021-11-07 02:01:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:11,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:11,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:11,029 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:11,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:01:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:11,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:01:11,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:11,786 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 02:01:11,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:11,956 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 02:01:11,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:11,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38242633] [2021-11-07 02:01:11,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38242633] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:11,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:11,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:01:11,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614452093] [2021-11-07 02:01:11,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:11,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:11,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:11,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:11,961 INFO L87 Difference]: Start difference. First operand 818 states and 1404 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 02:01:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:12,080 INFO L93 Difference]: Finished difference Result 1633 states and 2805 transitions. [2021-11-07 02:01:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:12,080 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 02:01:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:12,091 INFO L225 Difference]: With dead ends: 1633 [2021-11-07 02:01:12,091 INFO L226 Difference]: Without dead ends: 823 [2021-11-07 02:01:12,093 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 02:01:12,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-11-07 02:01:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 818. [2021-11-07 02:01:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 806 states have (on average 1.7382133995037221) internal successors, (1401), 817 states have internal predecessors, (1401), 0 states have call successors, (0), 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 02:01:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1401 transitions. [2021-11-07 02:01:12,159 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1401 transitions. Word has length 53 [2021-11-07 02:01:12,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:12,161 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1401 transitions. [2021-11-07 02:01:12,162 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 02:01:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1401 transitions. [2021-11-07 02:01:12,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:01:12,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:12,165 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 02:01:12,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:12,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:12,383 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 02:01:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1865104247, now seen corresponding path program 1 times [2021-11-07 02:01:12,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:12,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929302269] [2021-11-07 02:01:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:12,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:12,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:12,387 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:12,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:01:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:01:13,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:13,269 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 02:01:13,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:13,470 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 02:01:13,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:13,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929302269] [2021-11-07 02:01:13,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929302269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:13,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:13,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:01:13,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224042851] [2021-11-07 02:01:13,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:13,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:01:13,473 INFO L87 Difference]: Start difference. First operand 818 states and 1401 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 02:01:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:13,852 INFO L93 Difference]: Finished difference Result 3180 states and 5470 transitions. [2021-11-07 02:01:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:01:13,853 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 02:01:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:13,872 INFO L225 Difference]: With dead ends: 3180 [2021-11-07 02:01:13,872 INFO L226 Difference]: Without dead ends: 2388 [2021-11-07 02:01:13,875 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 02:01:13,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-11-07 02:01:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 818. [2021-11-07 02:01:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 806 states have (on average 1.7344913151364765) internal successors, (1398), 817 states have internal predecessors, (1398), 0 states have call successors, (0), 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 02:01:13,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1398 transitions. [2021-11-07 02:01:13,985 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1398 transitions. Word has length 54 [2021-11-07 02:01:13,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:13,986 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1398 transitions. [2021-11-07 02:01:13,986 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 02:01:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1398 transitions. [2021-11-07 02:01:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:01:13,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:13,989 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 02:01:14,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:14,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:14,207 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 02:01:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:14,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1639822884, now seen corresponding path program 1 times [2021-11-07 02:01:14,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:14,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519636472] [2021-11-07 02:01:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:14,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:14,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:14,213 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:14,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:01:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:14,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:15,019 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 02:01:15,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:15,193 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 02:01:15,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:15,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519636472] [2021-11-07 02:01:15,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519636472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:15,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:15,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:01:15,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769250379] [2021-11-07 02:01:15,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:15,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:15,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:15,196 INFO L87 Difference]: Start difference. First operand 818 states and 1398 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 02:01:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:15,390 INFO L93 Difference]: Finished difference Result 2145 states and 3659 transitions. [2021-11-07 02:01:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:15,391 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 02:01:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:15,404 INFO L225 Difference]: With dead ends: 2145 [2021-11-07 02:01:15,404 INFO L226 Difference]: Without dead ends: 1610 [2021-11-07 02:01:15,409 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 02:01:15,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-11-07 02:01:15,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1075. [2021-11-07 02:01:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1063 states have (on average 1.760112888052681) internal successors, (1871), 1074 states have internal predecessors, (1871), 0 states have call successors, (0), 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 02:01:15,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1871 transitions. [2021-11-07 02:01:15,561 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1871 transitions. Word has length 56 [2021-11-07 02:01:15,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:15,561 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 1871 transitions. [2021-11-07 02:01:15,562 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 02:01:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1871 transitions. [2021-11-07 02:01:15,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:01:15,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:15,565 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 02:01:15,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:15,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:15,783 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 02:01:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash 388856491, now seen corresponding path program 1 times [2021-11-07 02:01:15,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:15,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205336431] [2021-11-07 02:01:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:15,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:15,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:15,786 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:15,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:01:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:16,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:16,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:16,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:16,849 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 02:01:16,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:16,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205336431] [2021-11-07 02:01:16,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205336431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:16,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:16,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:16,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064069781] [2021-11-07 02:01:16,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:16,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:16,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:16,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:16,852 INFO L87 Difference]: Start difference. First operand 1075 states and 1871 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 02:01:17,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:17,037 INFO L93 Difference]: Finished difference Result 2806 states and 4879 transitions. [2021-11-07 02:01:17,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:17,038 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 02:01:17,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:17,051 INFO L225 Difference]: With dead ends: 2806 [2021-11-07 02:01:17,052 INFO L226 Difference]: Without dead ends: 1815 [2021-11-07 02:01:17,054 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 02:01:17,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-11-07 02:01:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1280. [2021-11-07 02:01:17,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1268 states have (on average 1.7720820189274449) internal successors, (2247), 1279 states have internal predecessors, (2247), 0 states have call successors, (0), 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 02:01:17,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 2247 transitions. [2021-11-07 02:01:17,176 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 2247 transitions. Word has length 68 [2021-11-07 02:01:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:17,176 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 2247 transitions. [2021-11-07 02:01:17,177 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 02:01:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 2247 transitions. [2021-11-07 02:01:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:01:17,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:17,180 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 02:01:17,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:17,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:17,381 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 02:01:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1619718700, now seen corresponding path program 1 times [2021-11-07 02:01:17,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:17,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468702826] [2021-11-07 02:01:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:17,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:17,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:17,384 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:17,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:01:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:17,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:17,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:18,173 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 02:01:18,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:18,393 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 02:01:18,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:18,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468702826] [2021-11-07 02:01:18,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468702826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:18,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:18,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:18,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580206421] [2021-11-07 02:01:18,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:18,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:18,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:18,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:18,396 INFO L87 Difference]: Start difference. First operand 1280 states and 2247 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 02:01:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:18,612 INFO L93 Difference]: Finished difference Result 3453 states and 6072 transitions. [2021-11-07 02:01:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:18,612 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 02:01:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:18,630 INFO L225 Difference]: With dead ends: 3453 [2021-11-07 02:01:18,630 INFO L226 Difference]: Without dead ends: 2265 [2021-11-07 02:01:18,635 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 02:01:18,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-11-07 02:01:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1730. [2021-11-07 02:01:18,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1718 states have (on average 1.789871944121071) internal successors, (3075), 1729 states have internal predecessors, (3075), 0 states have call successors, (0), 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 02:01:18,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 3075 transitions. [2021-11-07 02:01:18,801 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 3075 transitions. Word has length 69 [2021-11-07 02:01:18,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:18,802 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 3075 transitions. [2021-11-07 02:01:18,802 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 02:01:18,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 3075 transitions. [2021-11-07 02:01:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:01:18,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:18,807 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 02:01:18,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:19,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:19,031 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 02:01:19,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:19,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1072642877, now seen corresponding path program 1 times [2021-11-07 02:01:19,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:19,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267080359] [2021-11-07 02:01:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:19,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:19,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:19,035 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:19,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:01:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:19,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:19,968 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 02:01:19,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:20,181 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 02:01:20,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:20,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267080359] [2021-11-07 02:01:20,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267080359] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:20,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:20,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:20,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173934940] [2021-11-07 02:01:20,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:20,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:20,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:20,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:20,184 INFO L87 Difference]: Start difference. First operand 1730 states and 3075 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 02:01:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:20,426 INFO L93 Difference]: Finished difference Result 4783 states and 8525 transitions. [2021-11-07 02:01:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:20,427 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 02:01:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:20,451 INFO L225 Difference]: With dead ends: 4783 [2021-11-07 02:01:20,451 INFO L226 Difference]: Without dead ends: 3153 [2021-11-07 02:01:20,455 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 02:01:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3153 states. [2021-11-07 02:01:20,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3153 to 2618. [2021-11-07 02:01:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2606 states have (on average 1.807367613200307) internal successors, (4710), 2617 states have internal predecessors, (4710), 0 states have call successors, (0), 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 02:01:20,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 4710 transitions. [2021-11-07 02:01:20,711 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 4710 transitions. Word has length 70 [2021-11-07 02:01:20,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:20,712 INFO L470 AbstractCegarLoop]: Abstraction has 2618 states and 4710 transitions. [2021-11-07 02:01:20,712 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 02:01:20,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 4710 transitions. [2021-11-07 02:01:20,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:01:20,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:20,725 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 02:01:20,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:20,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:20,943 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 02:01:20,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:20,943 INFO L85 PathProgramCache]: Analyzing trace with hash 684150205, now seen corresponding path program 1 times [2021-11-07 02:01:20,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:20,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530792376] [2021-11-07 02:01:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:20,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:20,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:20,945 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:20,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:01:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:21,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:21,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:21,762 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 02:01:21,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:21,967 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 02:01:21,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:21,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530792376] [2021-11-07 02:01:21,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530792376] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:21,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:21,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:21,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637095465] [2021-11-07 02:01:21,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:21,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:21,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:21,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:21,969 INFO L87 Difference]: Start difference. First operand 2618 states and 4710 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 02:01:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:22,322 INFO L93 Difference]: Finished difference Result 7183 states and 12949 transitions. [2021-11-07 02:01:22,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:22,323 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 02:01:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:22,360 INFO L225 Difference]: With dead ends: 7183 [2021-11-07 02:01:22,361 INFO L226 Difference]: Without dead ends: 4699 [2021-11-07 02:01:22,366 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 02:01:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4699 states. [2021-11-07 02:01:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4699 to 4164. [2021-11-07 02:01:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4164 states, 4152 states have (on average 1.8196050096339114) internal successors, (7555), 4163 states have internal predecessors, (7555), 0 states have call successors, (0), 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 02:01:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4164 states to 4164 states and 7555 transitions. [2021-11-07 02:01:22,732 INFO L78 Accepts]: Start accepts. Automaton has 4164 states and 7555 transitions. Word has length 71 [2021-11-07 02:01:22,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:22,733 INFO L470 AbstractCegarLoop]: Abstraction has 4164 states and 7555 transitions. [2021-11-07 02:01:22,733 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 02:01:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4164 states and 7555 transitions. [2021-11-07 02:01:22,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:01:22,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:22,741 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 02:01:22,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:22,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:22,956 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 02:01:22,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash -433528916, now seen corresponding path program 1 times [2021-11-07 02:01:22,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:22,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38828871] [2021-11-07 02:01:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:22,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:22,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:22,958 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:22,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:01:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:23,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:23,814 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 02:01:23,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:24,042 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 02:01:24,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:24,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38828871] [2021-11-07 02:01:24,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38828871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:24,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:24,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:24,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862717043] [2021-11-07 02:01:24,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:24,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:24,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:24,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:24,044 INFO L87 Difference]: Start difference. First operand 4164 states and 7555 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 02:01:24,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:24,568 INFO L93 Difference]: Finished difference Result 11537 states and 20967 transitions. [2021-11-07 02:01:24,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:24,568 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 02:01:24,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:24,623 INFO L225 Difference]: With dead ends: 11537 [2021-11-07 02:01:24,624 INFO L226 Difference]: Without dead ends: 7541 [2021-11-07 02:01:24,630 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 02:01:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7541 states. [2021-11-07 02:01:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7541 to 7006. [2021-11-07 02:01:25,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7006 states, 6994 states have (on average 1.8272805261652845) internal successors, (12780), 7005 states have internal predecessors, (12780), 0 states have call successors, (0), 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 02:01:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7006 states to 7006 states and 12780 transitions. [2021-11-07 02:01:25,214 INFO L78 Accepts]: Start accepts. Automaton has 7006 states and 12780 transitions. Word has length 72 [2021-11-07 02:01:25,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:25,216 INFO L470 AbstractCegarLoop]: Abstraction has 7006 states and 12780 transitions. [2021-11-07 02:01:25,217 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 02:01:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 7006 states and 12780 transitions. [2021-11-07 02:01:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:01:25,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:25,229 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 02:01:25,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:25,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:25,447 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 02:01:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:25,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1691885388, now seen corresponding path program 1 times [2021-11-07 02:01:25,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:25,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840386389] [2021-11-07 02:01:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:25,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:25,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:25,449 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:25,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:01:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:26,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:26,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:26,325 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 02:01:26,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:26,549 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 02:01:26,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:26,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840386389] [2021-11-07 02:01:26,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840386389] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:26,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:26,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:26,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433623404] [2021-11-07 02:01:26,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:26,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:26,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:26,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:26,551 INFO L87 Difference]: Start difference. First operand 7006 states and 12780 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 02:01:27,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:27,398 INFO L93 Difference]: Finished difference Result 20521 states and 37484 transitions. [2021-11-07 02:01:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:27,399 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 02:01:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:27,446 INFO L225 Difference]: With dead ends: 20521 [2021-11-07 02:01:27,446 INFO L226 Difference]: Without dead ends: 13687 [2021-11-07 02:01:27,457 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 02:01:27,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13687 states. [2021-11-07 02:01:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13687 to 13152. [2021-11-07 02:01:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13152 states, 13140 states have (on average 1.8311263318112634) internal successors, (24061), 13151 states have internal predecessors, (24061), 0 states have call successors, (0), 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 02:01:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13152 states to 13152 states and 24061 transitions. [2021-11-07 02:01:28,423 INFO L78 Accepts]: Start accepts. Automaton has 13152 states and 24061 transitions. Word has length 73 [2021-11-07 02:01:28,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:28,423 INFO L470 AbstractCegarLoop]: Abstraction has 13152 states and 24061 transitions. [2021-11-07 02:01:28,423 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 02:01:28,424 INFO L276 IsEmpty]: Start isEmpty. Operand 13152 states and 24061 transitions. [2021-11-07 02:01:28,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:01:28,435 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:28,435 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:28,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:28,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:28,653 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 02:01:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:28,654 INFO L85 PathProgramCache]: Analyzing trace with hash -758003908, now seen corresponding path program 1 times [2021-11-07 02:01:28,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:28,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474351896] [2021-11-07 02:01:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:28,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:28,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:28,657 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:28,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:01:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:29,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:01:29,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:29,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:01:30,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:30,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474351896] [2021-11-07 02:01:30,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474351896] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:30,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:30,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:01:30,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496740901] [2021-11-07 02:01:30,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:30,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:30,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:30,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:01:30,040 INFO L87 Difference]: Start difference. First operand 13152 states and 24061 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 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 02:01:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:33,655 INFO L93 Difference]: Finished difference Result 32625 states and 59674 transitions. [2021-11-07 02:01:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:01:33,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 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 02:01:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:33,726 INFO L225 Difference]: With dead ends: 32625 [2021-11-07 02:01:33,726 INFO L226 Difference]: Without dead ends: 19766 [2021-11-07 02:01:33,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:01:33,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19766 states. [2021-11-07 02:01:34,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19766 to 13119. [2021-11-07 02:01:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13119 states, 13107 states have (on average 1.8256656748302433) internal successors, (23929), 13118 states have internal predecessors, (23929), 0 states have call successors, (0), 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 02:01:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13119 states to 13119 states and 23929 transitions. [2021-11-07 02:01:34,817 INFO L78 Accepts]: Start accepts. Automaton has 13119 states and 23929 transitions. Word has length 74 [2021-11-07 02:01:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:34,817 INFO L470 AbstractCegarLoop]: Abstraction has 13119 states and 23929 transitions. [2021-11-07 02:01:34,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 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 02:01:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 13119 states and 23929 transitions. [2021-11-07 02:01:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:01:34,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:34,830 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:34,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:35,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:35,044 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 02:01:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:35,045 INFO L85 PathProgramCache]: Analyzing trace with hash 323587613, now seen corresponding path program 1 times [2021-11-07 02:01:35,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:35,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955456549] [2021-11-07 02:01:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:35,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:35,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:35,048 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:35,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:01:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:35,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:35,996 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 02:01:35,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:36,212 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 02:01:36,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:36,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955456549] [2021-11-07 02:01:36,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955456549] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:36,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:36,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:36,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105370234] [2021-11-07 02:01:36,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:36,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:36,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:36,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:36,215 INFO L87 Difference]: Start difference. First operand 13119 states and 23929 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:37,596 INFO L93 Difference]: Finished difference Result 38564 states and 70414 transitions. [2021-11-07 02:01:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:37,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:01:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:37,692 INFO L225 Difference]: With dead ends: 38564 [2021-11-07 02:01:37,692 INFO L226 Difference]: Without dead ends: 25624 [2021-11-07 02:01:37,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:37,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25624 states. [2021-11-07 02:01:39,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25624 to 25089. [2021-11-07 02:01:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25089 states, 25077 states have (on average 1.827092554930813) internal successors, (45818), 25088 states have internal predecessors, (45818), 0 states have call successors, (0), 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 02:01:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25089 states to 25089 states and 45818 transitions. [2021-11-07 02:01:39,158 INFO L78 Accepts]: Start accepts. Automaton has 25089 states and 45818 transitions. Word has length 74 [2021-11-07 02:01:39,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:39,158 INFO L470 AbstractCegarLoop]: Abstraction has 25089 states and 45818 transitions. [2021-11-07 02:01:39,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 25089 states and 45818 transitions. [2021-11-07 02:01:39,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:01:39,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:39,175 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:39,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:39,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:39,396 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 02:01:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash -915087158, now seen corresponding path program 1 times [2021-11-07 02:01:39,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:39,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281899195] [2021-11-07 02:01:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:39,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:39,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:39,400 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:39,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:01:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:40,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:40,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:40,454 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 02:01:40,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:40,646 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 02:01:40,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:40,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281899195] [2021-11-07 02:01:40,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281899195] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:40,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:40,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:01:40,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982098597] [2021-11-07 02:01:40,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:40,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:40,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:40,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:40,649 INFO L87 Difference]: Start difference. First operand 25089 states and 45818 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:42,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:42,914 INFO L93 Difference]: Finished difference Result 69113 states and 125817 transitions. [2021-11-07 02:01:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:42,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:01:42,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:43,043 INFO L225 Difference]: With dead ends: 69113 [2021-11-07 02:01:43,044 INFO L226 Difference]: Without dead ends: 44250 [2021-11-07 02:01:43,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44250 states. [2021-11-07 02:01:46,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44250 to 43715. [2021-11-07 02:01:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43715 states, 43703 states have (on average 1.8157792371233097) internal successors, (79355), 43714 states have internal predecessors, (79355), 0 states have call successors, (0), 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 02:01:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43715 states to 43715 states and 79355 transitions. [2021-11-07 02:01:46,178 INFO L78 Accepts]: Start accepts. Automaton has 43715 states and 79355 transitions. Word has length 75 [2021-11-07 02:01:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:46,178 INFO L470 AbstractCegarLoop]: Abstraction has 43715 states and 79355 transitions. [2021-11-07 02:01:46,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 43715 states and 79355 transitions. [2021-11-07 02:01:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:01:46,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:46,190 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] [2021-11-07 02:01:46,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:46,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:46,404 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 02:01:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:46,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1828611530, now seen corresponding path program 1 times [2021-11-07 02:01:46,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:46,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829902797] [2021-11-07 02:01:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:46,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:46,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:46,408 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:46,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:01:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:47,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:01:47,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:47,574 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 02:01:47,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:47,843 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 02:01:47,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:47,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829902797] [2021-11-07 02:01:47,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829902797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:47,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:47,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:01:47,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379870977] [2021-11-07 02:01:47,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:47,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:47,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:47,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:01:47,846 INFO L87 Difference]: Start difference. First operand 43715 states and 79355 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 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 02:01:56,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:56,168 INFO L93 Difference]: Finished difference Result 170140 states and 308742 transitions. [2021-11-07 02:01:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:01:56,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 02:01:56,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:56,728 INFO L225 Difference]: With dead ends: 170140 [2021-11-07 02:01:56,729 INFO L226 Difference]: Without dead ends: 126717 [2021-11-07 02:01:56,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:01:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126717 states. [2021-11-07 02:02:00,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126717 to 43457. [2021-11-07 02:02:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43457 states, 43445 states have (on average 1.8028081482333986) internal successors, (78323), 43456 states have internal predecessors, (78323), 0 states have call successors, (0), 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 02:02:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43457 states to 43457 states and 78323 transitions. [2021-11-07 02:02:01,006 INFO L78 Accepts]: Start accepts. Automaton has 43457 states and 78323 transitions. Word has length 76 [2021-11-07 02:02:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:01,007 INFO L470 AbstractCegarLoop]: Abstraction has 43457 states and 78323 transitions. [2021-11-07 02:02:01,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 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 02:02:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 43457 states and 78323 transitions. [2021-11-07 02:02:01,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:02:01,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:01,018 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:01,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:01,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:01,219 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 02:02:01,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:01,219 INFO L85 PathProgramCache]: Analyzing trace with hash -452528040, now seen corresponding path program 1 times [2021-11-07 02:02:01,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:01,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910764832] [2021-11-07 02:02:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:01,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:01,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:01,221 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:01,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:02:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:01,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:01,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:02,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:02,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:02,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910764832] [2021-11-07 02:02:02,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910764832] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:02,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:02,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:02:02,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554971698] [2021-11-07 02:02:02,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:02:02,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:02,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:02:02,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:02,402 INFO L87 Difference]: Start difference. First operand 43457 states and 78323 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 02:02:04,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:04,660 INFO L93 Difference]: Finished difference Result 87151 states and 157037 transitions. [2021-11-07 02:02:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:04,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 02:02:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:04,741 INFO L225 Difference]: With dead ends: 87151 [2021-11-07 02:02:04,741 INFO L226 Difference]: Without dead ends: 43992 [2021-11-07 02:02:04,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 148 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 02:02:04,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43992 states. [2021-11-07 02:02:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43992 to 43457. [2021-11-07 02:02:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43457 states, 43445 states have (on average 1.799861894349177) internal successors, (78195), 43456 states have internal predecessors, (78195), 0 states have call successors, (0), 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 02:02:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43457 states to 43457 states and 78195 transitions. [2021-11-07 02:02:07,798 INFO L78 Accepts]: Start accepts. Automaton has 43457 states and 78195 transitions. Word has length 76 [2021-11-07 02:02:07,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:07,799 INFO L470 AbstractCegarLoop]: Abstraction has 43457 states and 78195 transitions. [2021-11-07 02:02:07,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 02:02:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand 43457 states and 78195 transitions. [2021-11-07 02:02:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:02:07,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:07,808 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, 1, 1, 1, 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 02:02:07,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:08,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:08,009 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 02:02:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1473511413, now seen corresponding path program 1 times [2021-11-07 02:02:08,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:08,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286832034] [2021-11-07 02:02:08,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:08,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:08,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:08,011 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:08,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9edf62-7621-4391-b5c9-b9a31a33abaf/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:02:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:08,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:08,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:09,151 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 02:02:09,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:09,341 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 02:02:09,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:09,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286832034] [2021-11-07 02:02:09,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286832034] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:09,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:09,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:02:09,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984805158] [2021-11-07 02:02:09,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:09,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:09,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:09,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:09,343 INFO L87 Difference]: Start difference. First operand 43457 states and 78195 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)