./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product24.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_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/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_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/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_815b8a66-2a8f-4659-9108-65f2af42df8b/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 51fa488e776e831bac86701b44da2398387b953b2cee791cda39a1547c039fcd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:08:48,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:08:48,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:08:48,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:08:48,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:08:48,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:08:48,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:08:48,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:08:48,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:08:48,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:08:48,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:08:48,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:08:48,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:08:48,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:08:48,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:08:48,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:08:48,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:08:48,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:08:48,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:08:48,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:08:48,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:08:48,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:08:48,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:08:48,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:08:48,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:08:48,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:08:48,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:08:48,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:08:48,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:08:48,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:08:48,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:08:48,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:08:48,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:08:48,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:08:48,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:08:48,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:08:48,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:08:48,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:08:48,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:08:48,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:08:48,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:08:48,788 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:08:48,830 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:08:48,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:08:48,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:08:48,832 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:08:48,832 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:08:48,832 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:08:48,833 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:08:48,833 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:08:48,839 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:08:48,839 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:08:48,840 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:08:48,841 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:08:48,841 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:08:48,841 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:08:48,841 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:08:48,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:08:48,843 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:08:48,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:08:48,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:08:48,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:08:48,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:08:48,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:08:48,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:08:48,845 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:08:48,845 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:08:48,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:08:48,845 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:08:48,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:08:48,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:08:48,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:08:48,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:08:48,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:08:48,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:08:48,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:08:48,849 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:08:48,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:08:48,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:08:48,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:08:48,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:08:48,850 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_815b8a66-2a8f-4659-9108-65f2af42df8b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51fa488e776e831bac86701b44da2398387b953b2cee791cda39a1547c039fcd [2021-11-07 02:08:49,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:08:49,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:08:49,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:08:49,141 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:08:49,142 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:08:49,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product24.cil.c [2021-11-07 02:08:49,211 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/data/2ed91202a/57d8b222e00044f89bf31c33a84f92d3/FLAG037dcf64f [2021-11-07 02:08:49,815 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:08:49,816 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/sv-benchmarks/c/product-lines/email_spec11_product24.cil.c [2021-11-07 02:08:49,848 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/data/2ed91202a/57d8b222e00044f89bf31c33a84f92d3/FLAG037dcf64f [2021-11-07 02:08:50,036 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/data/2ed91202a/57d8b222e00044f89bf31c33a84f92d3 [2021-11-07 02:08:50,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:08:50,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:08:50,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:50,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:08:50,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:08:50,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:50" (1/1) ... [2021-11-07 02:08:50,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cff8b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:50, skipping insertion in model container [2021-11-07 02:08:50,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:50" (1/1) ... [2021-11-07 02:08:50,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:08:50,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:08:50,523 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_815b8a66-2a8f-4659-9108-65f2af42df8b/sv-benchmarks/c/product-lines/email_spec11_product24.cil.c[16887,16900] [2021-11-07 02:08:50,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:50,795 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 02:08:50,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@60136a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:50, skipping insertion in model container [2021-11-07 02:08:50,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:50,797 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:08:50,799 INFO L168 Benchmark]: Toolchain (without parser) took 757.71 ms. Allocated memory is still 104.9 MB. Free memory was 60.6 MB in the beginning and 65.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:08:50,801 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 104.9 MB. Free memory is still 79.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:08:50,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 750.35 ms. Allocated memory is still 104.9 MB. Free memory was 60.4 MB in the beginning and 65.9 MB in the end (delta: -5.5 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:08:50,804 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 104.9 MB. Free memory is still 79.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 750.35 ms. Allocated memory is still 104.9 MB. Free memory was 60.4 MB in the beginning and 65.9 MB in the end (delta: -5.5 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 404]: 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_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/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_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/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_815b8a66-2a8f-4659-9108-65f2af42df8b/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 51fa488e776e831bac86701b44da2398387b953b2cee791cda39a1547c039fcd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:08:53,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:08:53,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:08:53,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:08:53,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:08:53,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:08:53,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:08:53,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:08:53,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:08:53,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:08:53,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:08:53,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:08:53,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:08:53,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:08:53,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:08:53,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:08:53,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:08:53,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:08:53,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:08:53,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:08:53,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:08:53,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:08:53,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:08:53,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:08:53,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:08:53,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:08:53,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:08:53,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:08:53,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:08:53,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:08:53,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:08:53,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:08:53,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:08:53,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:08:53,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:08:53,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:08:53,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:08:53,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:08:53,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:08:53,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:08:53,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:08:53,239 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:08:53,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:08:53,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:08:53,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:08:53,279 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:08:53,279 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:08:53,280 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:08:53,280 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:08:53,280 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:08:53,280 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:08:53,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:08:53,282 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:08:53,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:08:53,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:08:53,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:08:53,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:08:53,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:08:53,284 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:08:53,284 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:08:53,284 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:08:53,284 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:08:53,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:08:53,284 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:08:53,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:08:53,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:08:53,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:08:53,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:08:53,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:08:53,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:08:53,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:08:53,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:08:53,286 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:08:53,286 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:53,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:08:53,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:08:53,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:08:53,288 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_815b8a66-2a8f-4659-9108-65f2af42df8b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51fa488e776e831bac86701b44da2398387b953b2cee791cda39a1547c039fcd [2021-11-07 02:08:53,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:08:53,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:08:53,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:08:53,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:08:53,729 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:08:53,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product24.cil.c [2021-11-07 02:08:53,802 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/data/485731a31/483688355e344753a7053d0f3a7dd1f8/FLAGfc75faf84 [2021-11-07 02:08:54,515 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:08:54,522 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/sv-benchmarks/c/product-lines/email_spec11_product24.cil.c [2021-11-07 02:08:54,558 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/data/485731a31/483688355e344753a7053d0f3a7dd1f8/FLAGfc75faf84 [2021-11-07 02:08:54,672 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/data/485731a31/483688355e344753a7053d0f3a7dd1f8 [2021-11-07 02:08:54,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:08:54,679 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:08:54,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:54,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:08:54,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:08:54,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:54" (1/1) ... [2021-11-07 02:08:54,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fbe48a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:54, skipping insertion in model container [2021-11-07 02:08:54,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:54" (1/1) ... [2021-11-07 02:08:54,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:08:54,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:08:55,094 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_815b8a66-2a8f-4659-9108-65f2af42df8b/sv-benchmarks/c/product-lines/email_spec11_product24.cil.c[16887,16900] [2021-11-07 02:08:55,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:55,280 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:08:55,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:08:55,341 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_815b8a66-2a8f-4659-9108-65f2af42df8b/sv-benchmarks/c/product-lines/email_spec11_product24.cil.c[16887,16900] [2021-11-07 02:08:55,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:55,413 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:08:55,451 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_815b8a66-2a8f-4659-9108-65f2af42df8b/sv-benchmarks/c/product-lines/email_spec11_product24.cil.c[16887,16900] [2021-11-07 02:08:55,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:08:55,558 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:08:55,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:55 WrapperNode [2021-11-07 02:08:55,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:08:55,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:08:55,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:08:55,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:08:55,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:55" (1/1) ... [2021-11-07 02:08:55,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:55" (1/1) ... [2021-11-07 02:08:55,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:08:55,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:08:55,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:08:55,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:08:55,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:55" (1/1) ... [2021-11-07 02:08:55,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:55" (1/1) ... [2021-11-07 02:08:55,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:55" (1/1) ... [2021-11-07 02:08:55,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:55" (1/1) ... [2021-11-07 02:08:55,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:55" (1/1) ... [2021-11-07 02:08:55,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:55" (1/1) ... [2021-11-07 02:08:55,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:55" (1/1) ... [2021-11-07 02:08:55,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:08:55,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:08:55,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:08:55,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:08:55,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:55" (1/1) ... [2021-11-07 02:08:55,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:08:55,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:55,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:08:55,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:08:55,915 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:08:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:08:55,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:08:55,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:08:55,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:09:00,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:09:00,259 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-07 02:09:00,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:00 BoogieIcfgContainer [2021-11-07 02:09:00,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:09:00,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:09:00,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:09:00,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:09:00,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:08:54" (1/3) ... [2021-11-07 02:09:00,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8274db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:00, skipping insertion in model container [2021-11-07 02:09:00,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:55" (2/3) ... [2021-11-07 02:09:00,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8274db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:00, skipping insertion in model container [2021-11-07 02:09:00,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:00" (3/3) ... [2021-11-07 02:09:00,271 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product24.cil.c [2021-11-07 02:09:00,276 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:09:00,276 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:09:00,326 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:09:00,332 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 02:09:00,333 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:09:00,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 463 states, 460 states have (on average 1.7369565217391305) internal successors, (799), 462 states have internal predecessors, (799), 0 states have call successors, (0), 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 02:09:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:09:00,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:00,372 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] [2021-11-07 02:09:00,372 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:00,378 INFO L85 PathProgramCache]: Analyzing trace with hash 783021100, now seen corresponding path program 1 times [2021-11-07 02:09:00,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:00,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469780670] [2021-11-07 02:09:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:00,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:00,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:00,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:00,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:09:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:00,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:09:00,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:01,061 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 02:09:01,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:01,217 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 02:09:01,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:01,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469780670] [2021-11-07 02:09:01,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469780670] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:01,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:01,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:09:01,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272690638] [2021-11-07 02:09:01,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:09:01,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:01,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:09:01,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:09:01,250 INFO L87 Difference]: Start difference. First operand has 463 states, 460 states have (on average 1.7369565217391305) internal successors, (799), 462 states have internal predecessors, (799), 0 states have call successors, (0), 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 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 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 02:09:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:01,321 INFO L93 Difference]: Finished difference Result 680 states and 1150 transitions. [2021-11-07 02:09:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:09:01,323 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 02:09:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:01,339 INFO L225 Difference]: With dead ends: 680 [2021-11-07 02:09:01,339 INFO L226 Difference]: Without dead ends: 421 [2021-11-07 02:09:01,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 88 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 02:09:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-07 02:09:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2021-11-07 02:09:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 419 states have (on average 1.7374701670644392) internal successors, (728), 420 states have internal predecessors, (728), 0 states have call successors, (0), 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 02:09:01,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 728 transitions. [2021-11-07 02:09:01,437 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 728 transitions. Word has length 45 [2021-11-07 02:09:01,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:01,438 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 728 transitions. [2021-11-07 02:09:01,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 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 02:09:01,438 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 728 transitions. [2021-11-07 02:09:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:09:01,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:01,443 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] [2021-11-07 02:09:01,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:01,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:01,657 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:01,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:01,658 INFO L85 PathProgramCache]: Analyzing trace with hash 827810079, now seen corresponding path program 1 times [2021-11-07 02:09:01,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:01,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171089064] [2021-11-07 02:09:01,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:01,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:01,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:01,661 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:01,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:09:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:02,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:09:02,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:02,179 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 02:09:02,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:02,307 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 02:09:02,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:02,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171089064] [2021-11-07 02:09:02,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171089064] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:02,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:02,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:09:02,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87454151] [2021-11-07 02:09:02,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:09:02,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:02,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:09:02,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:09:02,316 INFO L87 Difference]: Start difference. First operand 421 states and 728 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:02,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:02,439 INFO L93 Difference]: Finished difference Result 1233 states and 2136 transitions. [2021-11-07 02:09:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:09:02,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 02:09:02,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:02,447 INFO L225 Difference]: With dead ends: 1233 [2021-11-07 02:09:02,447 INFO L226 Difference]: Without dead ends: 827 [2021-11-07 02:09:02,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 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 02:09:02,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-11-07 02:09:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 420. [2021-11-07 02:09:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 418 states have (on average 1.729665071770335) internal successors, (723), 419 states have internal predecessors, (723), 0 states have call successors, (0), 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 02:09:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 723 transitions. [2021-11-07 02:09:02,500 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 723 transitions. Word has length 46 [2021-11-07 02:09:02,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:02,500 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 723 transitions. [2021-11-07 02:09:02,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:02,500 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 723 transitions. [2021-11-07 02:09:02,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:09:02,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:02,503 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] [2021-11-07 02:09:02,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:02,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:02,716 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash 534767481, now seen corresponding path program 1 times [2021-11-07 02:09:02,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:02,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786965681] [2021-11-07 02:09:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:02,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:02,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:02,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:02,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:09:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:03,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:03,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:03,268 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 02:09:03,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:03,418 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 02:09:03,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:03,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786965681] [2021-11-07 02:09:03,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786965681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:03,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:03,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:09:03,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199520420] [2021-11-07 02:09:03,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:09:03,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:03,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:09:03,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:09:03,422 INFO L87 Difference]: Start difference. First operand 420 states and 723 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:03,661 INFO L93 Difference]: Finished difference Result 1597 states and 2754 transitions. [2021-11-07 02:09:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:09:03,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 02:09:03,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:03,671 INFO L225 Difference]: With dead ends: 1597 [2021-11-07 02:09:03,671 INFO L226 Difference]: Without dead ends: 1195 [2021-11-07 02:09:03,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 02:09:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-11-07 02:09:03,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 419. [2021-11-07 02:09:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 417 states have (on average 1.724220623501199) internal successors, (719), 418 states have internal predecessors, (719), 0 states have call successors, (0), 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 02:09:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 719 transitions. [2021-11-07 02:09:03,706 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 719 transitions. Word has length 48 [2021-11-07 02:09:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:03,707 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 719 transitions. [2021-11-07 02:09:03,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 719 transitions. [2021-11-07 02:09:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 02:09:03,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:03,713 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 02:09:03,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:03,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:03,928 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:03,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1970531130, now seen corresponding path program 1 times [2021-11-07 02:09:03,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:03,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327053749] [2021-11-07 02:09:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:03,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:03,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:03,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:03,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:09:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:04,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:09:04,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:04,485 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 02:09:04,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:04,606 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 02:09:04,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:04,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327053749] [2021-11-07 02:09:04,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327053749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:04,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:04,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:09:04,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378379059] [2021-11-07 02:09:04,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:09:04,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:04,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:09:04,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:09:04,610 INFO L87 Difference]: Start difference. First operand 419 states and 719 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 02:09:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:04,681 INFO L93 Difference]: Finished difference Result 835 states and 1435 transitions. [2021-11-07 02:09:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:09:04,682 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 49 [2021-11-07 02:09:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:04,685 INFO L225 Difference]: With dead ends: 835 [2021-11-07 02:09:04,685 INFO L226 Difference]: Without dead ends: 424 [2021-11-07 02:09:04,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 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 02:09:04,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-07 02:09:04,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 419. [2021-11-07 02:09:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 417 states have (on average 1.7170263788968825) internal successors, (716), 418 states have internal predecessors, (716), 0 states have call successors, (0), 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 02:09:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 716 transitions. [2021-11-07 02:09:04,714 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 716 transitions. Word has length 49 [2021-11-07 02:09:04,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:04,715 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 716 transitions. [2021-11-07 02:09:04,715 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 02:09:04,715 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 716 transitions. [2021-11-07 02:09:04,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:09:04,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:04,717 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 02:09:04,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:04,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:04,935 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:04,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:04,935 INFO L85 PathProgramCache]: Analyzing trace with hash -169962095, now seen corresponding path program 1 times [2021-11-07 02:09:04,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:04,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249635363] [2021-11-07 02:09:04,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:04,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:04,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:04,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:04,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:09:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:05,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:05,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:05,518 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 02:09:05,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:05,655 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 02:09:05,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:05,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249635363] [2021-11-07 02:09:05,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249635363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:05,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:05,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:09:05,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679237653] [2021-11-07 02:09:05,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:09:05,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:05,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:09:05,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:09:05,658 INFO L87 Difference]: Start difference. First operand 419 states and 716 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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 02:09:05,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:05,877 INFO L93 Difference]: Finished difference Result 1584 states and 2730 transitions. [2021-11-07 02:09:05,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:09:05,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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 50 [2021-11-07 02:09:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:05,884 INFO L225 Difference]: With dead ends: 1584 [2021-11-07 02:09:05,884 INFO L226 Difference]: Without dead ends: 1191 [2021-11-07 02:09:05,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 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 02:09:05,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-11-07 02:09:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 419. [2021-11-07 02:09:05,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 417 states have (on average 1.709832134292566) internal successors, (713), 418 states have internal predecessors, (713), 0 states have call successors, (0), 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 02:09:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 713 transitions. [2021-11-07 02:09:05,922 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 713 transitions. Word has length 50 [2021-11-07 02:09:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:05,922 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 713 transitions. [2021-11-07 02:09:05,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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 02:09:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 713 transitions. [2021-11-07 02:09:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:09:05,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:05,924 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 02:09:05,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:06,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:06,139 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2019647882, now seen corresponding path program 1 times [2021-11-07 02:09:06,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:06,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169908958] [2021-11-07 02:09:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:06,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:06,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:06,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:06,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:09:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:09:06,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:06,679 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 02:09:06,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:06,802 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 02:09:06,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:06,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169908958] [2021-11-07 02:09:06,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169908958] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:06,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:06,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:09:06,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088412993] [2021-11-07 02:09:06,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:09:06,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:06,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:09:06,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:09:06,805 INFO L87 Difference]: Start difference. First operand 419 states and 713 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:06,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:06,888 INFO L93 Difference]: Finished difference Result 987 states and 1679 transitions. [2021-11-07 02:09:06,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:09:06,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:09:06,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:06,895 INFO L225 Difference]: With dead ends: 987 [2021-11-07 02:09:06,895 INFO L226 Difference]: Without dead ends: 812 [2021-11-07 02:09:06,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 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 02:09:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-07 02:09:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 637. [2021-11-07 02:09:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 635 states have (on average 1.7496062992125985) internal successors, (1111), 636 states have internal predecessors, (1111), 0 states have call successors, (0), 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 02:09:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1111 transitions. [2021-11-07 02:09:06,951 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1111 transitions. Word has length 52 [2021-11-07 02:09:06,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:06,952 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1111 transitions. [2021-11-07 02:09:06,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:06,952 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1111 transitions. [2021-11-07 02:09:06,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:09:06,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:06,954 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] [2021-11-07 02:09:06,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:07,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:07,169 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:07,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:07,169 INFO L85 PathProgramCache]: Analyzing trace with hash 198051749, now seen corresponding path program 1 times [2021-11-07 02:09:07,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:07,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307393359] [2021-11-07 02:09:07,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:07,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:07,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:07,171 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:07,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:09:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:07,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:09:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:07,784 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 02:09:07,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:07,943 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 02:09:07,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:07,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307393359] [2021-11-07 02:09:07,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307393359] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:07,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:07,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:09:07,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296699873] [2021-11-07 02:09:07,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:09:07,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:07,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:09:07,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:09:07,946 INFO L87 Difference]: Start difference. First operand 637 states and 1111 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:08,046 INFO L93 Difference]: Finished difference Result 1531 states and 2674 transitions. [2021-11-07 02:09:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:09:08,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:09:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:08,053 INFO L225 Difference]: With dead ends: 1531 [2021-11-07 02:09:08,054 INFO L226 Difference]: Without dead ends: 978 [2021-11-07 02:09:08,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 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 02:09:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-11-07 02:09:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 803. [2021-11-07 02:09:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 801 states have (on average 1.7627965043695382) internal successors, (1412), 802 states have internal predecessors, (1412), 0 states have call successors, (0), 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 02:09:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1412 transitions. [2021-11-07 02:09:08,130 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1412 transitions. Word has length 64 [2021-11-07 02:09:08,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:08,132 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1412 transitions. [2021-11-07 02:09:08,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:08,133 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1412 transitions. [2021-11-07 02:09:08,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:09:08,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:08,135 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] [2021-11-07 02:09:08,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:08,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:08,351 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:08,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:08,351 INFO L85 PathProgramCache]: Analyzing trace with hash 600663974, now seen corresponding path program 1 times [2021-11-07 02:09:08,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:08,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792373511] [2021-11-07 02:09:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:08,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:08,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:08,362 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:08,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:09:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:08,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:09:08,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:09,028 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 02:09:09,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:09,207 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 02:09:09,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:09,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792373511] [2021-11-07 02:09:09,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792373511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:09,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:09,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:09:09,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991816234] [2021-11-07 02:09:09,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:09:09,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:09,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:09:09,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:09:09,210 INFO L87 Difference]: Start difference. First operand 803 states and 1412 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:09,325 INFO L93 Difference]: Finished difference Result 2061 states and 3642 transitions. [2021-11-07 02:09:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:09:09,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:09:09,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:09,335 INFO L225 Difference]: With dead ends: 2061 [2021-11-07 02:09:09,335 INFO L226 Difference]: Without dead ends: 1350 [2021-11-07 02:09:09,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 02:09:09,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-11-07 02:09:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1175. [2021-11-07 02:09:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1173 states have (on average 1.7817561807331628) internal successors, (2090), 1174 states have internal predecessors, (2090), 0 states have call successors, (0), 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 02:09:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 2090 transitions. [2021-11-07 02:09:09,442 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 2090 transitions. Word has length 65 [2021-11-07 02:09:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:09,442 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 2090 transitions. [2021-11-07 02:09:09,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 2090 transitions. [2021-11-07 02:09:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:09:09,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:09,445 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] [2021-11-07 02:09:09,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:09,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:09,660 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:09,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:09,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2137333449, now seen corresponding path program 1 times [2021-11-07 02:09:09,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:09,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154678775] [2021-11-07 02:09:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:09,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:09,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:09,666 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:09,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:09:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:10,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:09:10,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:10,446 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 02:09:10,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:10,621 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 02:09:10,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:10,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154678775] [2021-11-07 02:09:10,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154678775] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:10,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:10,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:09:10,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835261726] [2021-11-07 02:09:10,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:09:10,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:10,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:09:10,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:09:10,626 INFO L87 Difference]: Start difference. First operand 1175 states and 2090 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:10,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:10,800 INFO L93 Difference]: Finished difference Result 3157 states and 5645 transitions. [2021-11-07 02:09:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:09:10,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:09:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:10,814 INFO L225 Difference]: With dead ends: 3157 [2021-11-07 02:09:10,815 INFO L226 Difference]: Without dead ends: 2082 [2021-11-07 02:09:10,819 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 02:09:10,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-11-07 02:09:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1907. [2021-11-07 02:09:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1905 states have (on average 1.7979002624671916) internal successors, (3425), 1906 states have internal predecessors, (3425), 0 states have call successors, (0), 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 02:09:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 3425 transitions. [2021-11-07 02:09:10,972 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 3425 transitions. Word has length 66 [2021-11-07 02:09:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:10,972 INFO L470 AbstractCegarLoop]: Abstraction has 1907 states and 3425 transitions. [2021-11-07 02:09:10,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 3425 transitions. [2021-11-07 02:09:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:09:10,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:10,976 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] [2021-11-07 02:09:10,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:11,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:11,193 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:11,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:11,193 INFO L85 PathProgramCache]: Analyzing trace with hash -916442185, now seen corresponding path program 1 times [2021-11-07 02:09:11,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:11,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462433724] [2021-11-07 02:09:11,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:11,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:11,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:11,195 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:11,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:09:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:11,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:09:11,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:11,877 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 02:09:11,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:12,042 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 02:09:12,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:12,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462433724] [2021-11-07 02:09:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462433724] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:12,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:12,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:09:12,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181139371] [2021-11-07 02:09:12,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:09:12,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:12,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:09:12,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:09:12,045 INFO L87 Difference]: Start difference. First operand 1907 states and 3425 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 02:09:12,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:12,273 INFO L93 Difference]: Finished difference Result 5089 states and 9169 transitions. [2021-11-07 02:09:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:09:12,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-07 02:09:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:12,296 INFO L225 Difference]: With dead ends: 5089 [2021-11-07 02:09:12,296 INFO L226 Difference]: Without dead ends: 3316 [2021-11-07 02:09:12,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 02:09:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-11-07 02:09:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 3141. [2021-11-07 02:09:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3141 states, 3139 states have (on average 1.8063077413188913) internal successors, (5670), 3140 states have internal predecessors, (5670), 0 states have call successors, (0), 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 02:09:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 5670 transitions. [2021-11-07 02:09:12,597 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 5670 transitions. Word has length 67 [2021-11-07 02:09:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:12,598 INFO L470 AbstractCegarLoop]: Abstraction has 3141 states and 5670 transitions. [2021-11-07 02:09:12,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 02:09:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 5670 transitions. [2021-11-07 02:09:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:09:12,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:12,608 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:12,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:12,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:12,823 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash -193063642, now seen corresponding path program 1 times [2021-11-07 02:09:12,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:12,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430342247] [2021-11-07 02:09:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:12,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:12,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:12,826 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:12,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:09:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:13,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:09:13,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:13,626 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 02:09:13,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:13,779 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 02:09:13,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:13,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430342247] [2021-11-07 02:09:13,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430342247] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:13,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:13,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:09:13,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885496488] [2021-11-07 02:09:13,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:09:13,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:13,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:09:13,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:09:13,781 INFO L87 Difference]: Start difference. First operand 3141 states and 5670 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 02:09:14,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:14,164 INFO L93 Difference]: Finished difference Result 8507 states and 15387 transitions. [2021-11-07 02:09:14,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:09:14,165 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 02:09:14,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:14,201 INFO L225 Difference]: With dead ends: 8507 [2021-11-07 02:09:14,201 INFO L226 Difference]: Without dead ends: 5534 [2021-11-07 02:09:14,205 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 02:09:14,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5534 states. [2021-11-07 02:09:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5534 to 5359. [2021-11-07 02:09:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 5357 states have (on average 1.8097815941758446) internal successors, (9695), 5358 states have internal predecessors, (9695), 0 states have call successors, (0), 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 02:09:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 9695 transitions. [2021-11-07 02:09:14,689 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 9695 transitions. Word has length 68 [2021-11-07 02:09:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:14,691 INFO L470 AbstractCegarLoop]: Abstraction has 5359 states and 9695 transitions. [2021-11-07 02:09:14,691 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 02:09:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 9695 transitions. [2021-11-07 02:09:14,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:09:14,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:14,696 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 02:09:14,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:14,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:14,912 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:14,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:14,912 INFO L85 PathProgramCache]: Analyzing trace with hash -687987514, now seen corresponding path program 1 times [2021-11-07 02:09:14,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:14,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165825251] [2021-11-07 02:09:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:14,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:14,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:14,916 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:14,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:09:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:15,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:09:15,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:15,732 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 02:09:15,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:15,909 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 02:09:15,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:15,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165825251] [2021-11-07 02:09:15,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165825251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:15,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:15,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:09:15,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222600273] [2021-11-07 02:09:15,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:09:15,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:15,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:09:15,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:09:15,912 INFO L87 Difference]: Start difference. First operand 5359 states and 9695 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 02:09:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:16,524 INFO L93 Difference]: Finished difference Result 15487 states and 28073 transitions. [2021-11-07 02:09:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:09:16,525 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 02:09:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:16,596 INFO L225 Difference]: With dead ends: 15487 [2021-11-07 02:09:16,596 INFO L226 Difference]: Without dead ends: 10304 [2021-11-07 02:09:16,609 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 02:09:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10304 states. [2021-11-07 02:09:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10304 to 10129. [2021-11-07 02:09:17,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10129 states, 10127 states have (on average 1.8121852473585465) internal successors, (18352), 10128 states have internal predecessors, (18352), 0 states have call successors, (0), 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 02:09:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10129 states to 10129 states and 18352 transitions. [2021-11-07 02:09:17,419 INFO L78 Accepts]: Start accepts. Automaton has 10129 states and 18352 transitions. Word has length 69 [2021-11-07 02:09:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:17,419 INFO L470 AbstractCegarLoop]: Abstraction has 10129 states and 18352 transitions. [2021-11-07 02:09:17,420 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 02:09:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 10129 states and 18352 transitions. [2021-11-07 02:09:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:09:17,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:17,427 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] [2021-11-07 02:09:17,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:17,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:17,646 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1757164586, now seen corresponding path program 1 times [2021-11-07 02:09:17,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:17,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302164096] [2021-11-07 02:09:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:17,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:17,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:17,650 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:17,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:09:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:18,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:09:18,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:18,510 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 02:09:18,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:18,731 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 02:09:18,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:18,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302164096] [2021-11-07 02:09:18,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302164096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:18,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:18,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:09:18,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262747539] [2021-11-07 02:09:18,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:09:18,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:18,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:09:18,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:09:18,734 INFO L87 Difference]: Start difference. First operand 10129 states and 18352 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 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 02:09:21,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:21,608 INFO L93 Difference]: Finished difference Result 24946 states and 45209 transitions. [2021-11-07 02:09:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:09:21,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 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 02:09:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:21,658 INFO L225 Difference]: With dead ends: 24946 [2021-11-07 02:09:21,659 INFO L226 Difference]: Without dead ends: 15071 [2021-11-07 02:09:21,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 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 02:09:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15071 states. [2021-11-07 02:09:22,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15071 to 10096. [2021-11-07 02:09:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10096 states, 10094 states have (on average 1.805032692688726) internal successors, (18220), 10095 states have internal predecessors, (18220), 0 states have call successors, (0), 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 02:09:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10096 states to 10096 states and 18220 transitions. [2021-11-07 02:09:22,455 INFO L78 Accepts]: Start accepts. Automaton has 10096 states and 18220 transitions. Word has length 70 [2021-11-07 02:09:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:22,456 INFO L470 AbstractCegarLoop]: Abstraction has 10096 states and 18220 transitions. [2021-11-07 02:09:22,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 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 02:09:22,456 INFO L276 IsEmpty]: Start isEmpty. Operand 10096 states and 18220 transitions. [2021-11-07 02:09:22,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:09:22,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:22,464 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 02:09:22,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:22,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:22,680 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:22,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:22,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1529764841, now seen corresponding path program 1 times [2021-11-07 02:09:22,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:22,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875485374] [2021-11-07 02:09:22,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:22,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:22,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:22,682 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:22,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:09:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:23,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:09:23,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:23,691 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 02:09:23,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:23,874 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 02:09:23,875 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:23,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875485374] [2021-11-07 02:09:23,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875485374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:23,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:23,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:09:23,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243045407] [2021-11-07 02:09:23,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:09:23,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:09:23,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:09:23,877 INFO L87 Difference]: Start difference. First operand 10096 states and 18220 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 02:09:24,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:24,529 INFO L93 Difference]: Finished difference Result 29530 states and 53355 transitions. [2021-11-07 02:09:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:09:24,530 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 02:09:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:24,581 INFO L225 Difference]: With dead ends: 29530 [2021-11-07 02:09:24,581 INFO L226 Difference]: Without dead ends: 19617 [2021-11-07 02:09:24,598 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 02:09:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19617 states. [2021-11-07 02:09:25,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19617 to 19442. [2021-11-07 02:09:25,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19442 states, 19440 states have (on average 1.804783950617284) internal successors, (35085), 19441 states have internal predecessors, (35085), 0 states have call successors, (0), 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 02:09:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19442 states to 19442 states and 35085 transitions. [2021-11-07 02:09:26,007 INFO L78 Accepts]: Start accepts. Automaton has 19442 states and 35085 transitions. Word has length 70 [2021-11-07 02:09:26,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:26,007 INFO L470 AbstractCegarLoop]: Abstraction has 19442 states and 35085 transitions. [2021-11-07 02:09:26,008 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 02:09:26,008 INFO L276 IsEmpty]: Start isEmpty. Operand 19442 states and 35085 transitions. [2021-11-07 02:09:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:09:26,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:26,017 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 02:09:26,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:26,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:26,232 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1371949399, now seen corresponding path program 1 times [2021-11-07 02:09:26,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:26,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149200189] [2021-11-07 02:09:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:26,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:26,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:26,234 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:26,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:09:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:26,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:09:26,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:26,993 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 02:09:26,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:27,171 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 02:09:27,171 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:27,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149200189] [2021-11-07 02:09:27,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149200189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:27,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:27,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:09:27,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028888160] [2021-11-07 02:09:27,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:09:27,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:27,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:09:27,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:09:27,173 INFO L87 Difference]: Start difference. First operand 19442 states and 35085 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 02:09:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:28,642 INFO L93 Difference]: Finished difference Result 57754 states and 104264 transitions. [2021-11-07 02:09:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:09:28,643 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 02:09:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:28,746 INFO L225 Difference]: With dead ends: 57754 [2021-11-07 02:09:28,746 INFO L226 Difference]: Without dead ends: 38499 [2021-11-07 02:09:28,774 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 02:09:28,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38499 states. [2021-11-07 02:09:30,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38499 to 38324. [2021-11-07 02:09:30,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38324 states, 38322 states have (on average 1.802358958300715) internal successors, (69070), 38323 states have internal predecessors, (69070), 0 states have call successors, (0), 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 02:09:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38324 states to 38324 states and 69070 transitions. [2021-11-07 02:09:30,874 INFO L78 Accepts]: Start accepts. Automaton has 38324 states and 69070 transitions. Word has length 71 [2021-11-07 02:09:30,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:30,874 INFO L470 AbstractCegarLoop]: Abstraction has 38324 states and 69070 transitions. [2021-11-07 02:09:30,874 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 02:09:30,875 INFO L276 IsEmpty]: Start isEmpty. Operand 38324 states and 69070 transitions. [2021-11-07 02:09:30,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:09:30,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:30,883 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] [2021-11-07 02:09:30,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 02:09:31,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:31,098 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:31,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:31,098 INFO L85 PathProgramCache]: Analyzing trace with hash 150481872, now seen corresponding path program 1 times [2021-11-07 02:09:31,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:31,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695344752] [2021-11-07 02:09:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:31,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:31,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:31,100 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:31,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:09:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:31,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:09:31,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:31,952 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 02:09:31,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:32,164 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 02:09:32,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:32,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695344752] [2021-11-07 02:09:32,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695344752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:32,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:32,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:09:32,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335883780] [2021-11-07 02:09:32,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:09:32,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:32,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:09:32,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:09:32,167 INFO L87 Difference]: Start difference. First operand 38324 states and 69070 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 02:09:38,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:38,851 INFO L93 Difference]: Finished difference Result 148693 states and 267827 transitions. [2021-11-07 02:09:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:09:38,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 02:09:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:39,261 INFO L225 Difference]: With dead ends: 148693 [2021-11-07 02:09:39,262 INFO L226 Difference]: Without dead ends: 110622 [2021-11-07 02:09:39,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 138 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 02:09:39,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110622 states. [2021-11-07 02:09:42,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110622 to 38066. [2021-11-07 02:09:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38066 states, 38064 states have (on average 1.7874632198402691) internal successors, (68038), 38065 states have internal predecessors, (68038), 0 states have call successors, (0), 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 02:09:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38066 states to 38066 states and 68038 transitions. [2021-11-07 02:09:42,118 INFO L78 Accepts]: Start accepts. Automaton has 38066 states and 68038 transitions. Word has length 72 [2021-11-07 02:09:42,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:42,119 INFO L470 AbstractCegarLoop]: Abstraction has 38066 states and 68038 transitions. [2021-11-07 02:09:42,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 02:09:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 38066 states and 68038 transitions. [2021-11-07 02:09:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:09:42,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:42,129 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] [2021-11-07 02:09:42,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 02:09:42,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:42,339 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:42,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:42,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1407849742, now seen corresponding path program 1 times [2021-11-07 02:09:42,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:42,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44635545] [2021-11-07 02:09:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:42,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:42,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:42,341 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:42,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:09:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:43,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:09:43,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:43,171 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 02:09:43,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:43,354 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 02:09:43,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:43,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44635545] [2021-11-07 02:09:43,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44635545] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:43,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:43,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:09:43,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187095543] [2021-11-07 02:09:43,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:09:43,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:43,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:09:43,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:09:43,361 INFO L87 Difference]: Start difference. First operand 38066 states and 68038 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:45,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:45,230 INFO L93 Difference]: Finished difference Result 76048 states and 135932 transitions. [2021-11-07 02:09:45,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:09:45,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:09:45,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:45,287 INFO L225 Difference]: With dead ends: 76048 [2021-11-07 02:09:45,287 INFO L226 Difference]: Without dead ends: 38241 [2021-11-07 02:09:45,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 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 02:09:45,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38241 states. [2021-11-07 02:09:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38241 to 38066. [2021-11-07 02:09:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38066 states, 38064 states have (on average 1.784100462379151) internal successors, (67910), 38065 states have internal predecessors, (67910), 0 states have call successors, (0), 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 02:09:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38066 states to 38066 states and 67910 transitions. [2021-11-07 02:09:47,411 INFO L78 Accepts]: Start accepts. Automaton has 38066 states and 67910 transitions. Word has length 72 [2021-11-07 02:09:47,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:47,411 INFO L470 AbstractCegarLoop]: Abstraction has 38066 states and 67910 transitions. [2021-11-07 02:09:47,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:47,411 INFO L276 IsEmpty]: Start isEmpty. Operand 38066 states and 67910 transitions. [2021-11-07 02:09:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:09:47,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:47,419 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 02:09:47,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:47,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:47,622 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:47,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1190871195, now seen corresponding path program 1 times [2021-11-07 02:09:47,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:47,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392677924] [2021-11-07 02:09:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:47,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:47,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:47,623 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:47,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_815b8a66-2a8f-4659-9108-65f2af42df8b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:09:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:48,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:09:48,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:48,464 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 02:09:48,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:48,623 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 02:09:48,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:48,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392677924] [2021-11-07 02:09:48,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392677924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:48,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:48,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:09:48,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567865499] [2021-11-07 02:09:48,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:09:48,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:48,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:09:48,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:09:48,628 INFO L87 Difference]: Start difference. First operand 38066 states and 67910 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 02:09:51,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:51,798 INFO L93 Difference]: Finished difference Result 105786 states and 188358 transitions. [2021-11-07 02:09:51,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:09:51,799 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 02:09:51,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:52,040 INFO L225 Difference]: With dead ends: 105786 [2021-11-07 02:09:52,040 INFO L226 Difference]: Without dead ends: 67939 [2021-11-07 02:09:52,060 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 02:09:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67939 states. [2021-11-07 02:09:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67939 to 67764.