./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product27.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_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/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_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/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_f123cf3a-ff58-4895-8206-b2ce6f790d11/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 d732923830fb3a71ab6990fcf85b09499ea996afd0bf98e12e19d094dda2a9f7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:11:04,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:11:04,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:11:04,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:11:04,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:11:04,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:11:04,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:11:04,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:11:04,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:11:04,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:11:04,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:11:04,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:11:04,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:11:04,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:11:04,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:11:04,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:11:04,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:11:04,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:11:04,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:11:04,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:11:04,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:11:04,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:11:04,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:11:04,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:11:04,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:11:04,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:11:04,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:11:04,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:11:04,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:11:04,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:11:04,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:11:04,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:11:04,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:11:04,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:11:04,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:11:04,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:11:04,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:11:04,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:11:04,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:11:04,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:11:04,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:11:04,688 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:11:04,736 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:11:04,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:11:04,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:11:04,738 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:11:04,738 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:11:04,738 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:11:04,738 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:11:04,739 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:11:04,739 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:11:04,739 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:11:04,740 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:11:04,740 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:11:04,740 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:11:04,741 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:11:04,741 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:11:04,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:11:04,742 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:11:04,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:11:04,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:11:04,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:11:04,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:11:04,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:11:04,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:11:04,743 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:11:04,743 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:11:04,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:11:04,744 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:11:04,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:11:04,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:11:04,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:11:04,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:04,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:11:04,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:11:04,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:11:04,746 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:11:04,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:11:04,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:11:04,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:11:04,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:11:04,747 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_f123cf3a-ff58-4895-8206-b2ce6f790d11/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d732923830fb3a71ab6990fcf85b09499ea996afd0bf98e12e19d094dda2a9f7 [2021-11-07 01:11:05,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:11:05,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:11:05,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:11:05,046 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:11:05,047 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:11:05,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product27.cil.c [2021-11-07 01:11:05,135 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/data/aa7aa3c3b/dc6452fddb2047ecae4e416aa18e0aef/FLAGdfc5168d0 [2021-11-07 01:11:05,803 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:11:05,803 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/sv-benchmarks/c/product-lines/email_spec0_product27.cil.c [2021-11-07 01:11:05,834 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/data/aa7aa3c3b/dc6452fddb2047ecae4e416aa18e0aef/FLAGdfc5168d0 [2021-11-07 01:11:05,979 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/data/aa7aa3c3b/dc6452fddb2047ecae4e416aa18e0aef [2021-11-07 01:11:05,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:11:05,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:11:05,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:05,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:11:05,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:11:05,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:05" (1/1) ... [2021-11-07 01:11:05,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa1c04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:05, skipping insertion in model container [2021-11-07 01:11:05,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:05" (1/1) ... [2021-11-07 01:11:06,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:11:06,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:06,503 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_f123cf3a-ff58-4895-8206-b2ce6f790d11/sv-benchmarks/c/product-lines/email_spec0_product27.cil.c[28349,28362] [2021-11-07 01:11:06,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:06,691 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:11:06,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@47d113fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:06, skipping insertion in model container [2021-11-07 01:11:06,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:06,692 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:11:06,695 INFO L168 Benchmark]: Toolchain (without parser) took 707.56 ms. Allocated memory is still 102.8 MB. Free memory was 65.9 MB in the beginning and 62.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:06,695 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 102.8 MB. Free memory is still 53.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:11:06,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 703.05 ms. Allocated memory is still 102.8 MB. Free memory was 65.7 MB in the beginning and 62.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:06,698 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 102.8 MB. Free memory is still 53.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 703.05 ms. Allocated memory is still 102.8 MB. Free memory was 65.7 MB in the beginning and 62.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 399]: 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_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/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_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/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_f123cf3a-ff58-4895-8206-b2ce6f790d11/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 d732923830fb3a71ab6990fcf85b09499ea996afd0bf98e12e19d094dda2a9f7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:11:08,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:11:08,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:11:08,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:11:08,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:11:08,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:11:08,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:11:08,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:11:08,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:11:08,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:11:08,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:11:08,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:11:08,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:11:08,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:11:08,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:11:08,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:11:08,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:11:08,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:11:08,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:11:08,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:11:08,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:11:08,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:11:08,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:11:08,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:11:08,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:11:08,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:11:08,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:11:08,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:11:08,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:11:08,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:11:08,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:11:08,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:11:08,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:11:09,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:11:09,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:11:09,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:11:09,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:11:09,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:11:09,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:11:09,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:11:09,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:11:09,010 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:11:09,057 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:11:09,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:11:09,058 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:11:09,059 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:11:09,059 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:11:09,059 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:11:09,059 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:11:09,060 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:11:09,060 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:11:09,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:11:09,063 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:11:09,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:11:09,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:11:09,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:11:09,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:11:09,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:11:09,064 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:11:09,064 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:11:09,064 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:11:09,065 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:11:09,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:11:09,065 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:11:09,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:11:09,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:11:09,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:11:09,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:11:09,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:09,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:11:09,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:11:09,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:11:09,067 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:11:09,067 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:09,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:11:09,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:11:09,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:11:09,068 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_f123cf3a-ff58-4895-8206-b2ce6f790d11/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d732923830fb3a71ab6990fcf85b09499ea996afd0bf98e12e19d094dda2a9f7 [2021-11-07 01:11:09,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:11:09,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:11:09,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:11:09,471 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:11:09,472 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:11:09,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product27.cil.c [2021-11-07 01:11:09,551 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/data/66a66e6d3/97242dcf89d14d92b974013bd08ec78d/FLAG11b2730f8 [2021-11-07 01:11:10,243 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:11:10,245 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/sv-benchmarks/c/product-lines/email_spec0_product27.cil.c [2021-11-07 01:11:10,271 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/data/66a66e6d3/97242dcf89d14d92b974013bd08ec78d/FLAG11b2730f8 [2021-11-07 01:11:10,468 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/data/66a66e6d3/97242dcf89d14d92b974013bd08ec78d [2021-11-07 01:11:10,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:11:10,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:11:10,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:10,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:11:10,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:11:10,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:10" (1/1) ... [2021-11-07 01:11:10,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74ac93f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10, skipping insertion in model container [2021-11-07 01:11:10,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:10" (1/1) ... [2021-11-07 01:11:10,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:11:10,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:11,017 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_f123cf3a-ff58-4895-8206-b2ce6f790d11/sv-benchmarks/c/product-lines/email_spec0_product27.cil.c[28349,28362] [2021-11-07 01:11:11,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:11,270 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:11:11,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:11,368 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_f123cf3a-ff58-4895-8206-b2ce6f790d11/sv-benchmarks/c/product-lines/email_spec0_product27.cil.c[28349,28362] [2021-11-07 01:11:11,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:11,448 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:11:11,523 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_f123cf3a-ff58-4895-8206-b2ce6f790d11/sv-benchmarks/c/product-lines/email_spec0_product27.cil.c[28349,28362] [2021-11-07 01:11:11,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:11,623 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:11:11,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:11 WrapperNode [2021-11-07 01:11:11,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:11,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:11:11,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:11:11,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:11:11,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:11" (1/1) ... [2021-11-07 01:11:11,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:11" (1/1) ... [2021-11-07 01:11:11,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:11:11,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:11:11,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:11:11,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:11:11,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:11" (1/1) ... [2021-11-07 01:11:11,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:11" (1/1) ... [2021-11-07 01:11:11,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:11" (1/1) ... [2021-11-07 01:11:11,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:11" (1/1) ... [2021-11-07 01:11:11,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:11" (1/1) ... [2021-11-07 01:11:11,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:11" (1/1) ... [2021-11-07 01:11:11,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:11" (1/1) ... [2021-11-07 01:11:12,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:11:12,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:11:12,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:11:12,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:11:12,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:11" (1/1) ... [2021-11-07 01:11:12,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:12,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:11:12,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:11:12,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:11:12,097 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:11:12,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:11:12,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:11:12,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:11:12,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:11:17,503 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:11:17,503 INFO L299 CfgBuilder]: Removed 685 assume(true) statements. [2021-11-07 01:11:17,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:17 BoogieIcfgContainer [2021-11-07 01:11:17,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:11:17,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:11:17,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:11:17,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:11:17,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:11:10" (1/3) ... [2021-11-07 01:11:17,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76299e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:17, skipping insertion in model container [2021-11-07 01:11:17,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:11" (2/3) ... [2021-11-07 01:11:17,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76299e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:17, skipping insertion in model container [2021-11-07 01:11:17,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:17" (3/3) ... [2021-11-07 01:11:17,515 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product27.cil.c [2021-11-07 01:11:17,521 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:11:17,521 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:11:17,575 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:11:17,582 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:11:17,582 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:11:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 946 states, 939 states have (on average 1.7220447284345048) internal successors, (1617), 945 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:17,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:11:17,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:17,636 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:17,637 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1412971387, now seen corresponding path program 1 times [2021-11-07 01:11:17,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:17,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20063164] [2021-11-07 01:11:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:17,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:17,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:17,665 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:17,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:11:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:18,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:11:18,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:18,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:18,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:18,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20063164] [2021-11-07 01:11:18,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20063164] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:18,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:18,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:11:18,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743290791] [2021-11-07 01:11:18,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:11:18,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:18,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:11:18,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:11:18,623 INFO L87 Difference]: Start difference. First operand has 946 states, 939 states have (on average 1.7220447284345048) internal successors, (1617), 945 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:18,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:18,732 INFO L93 Difference]: Finished difference Result 1603 states and 2704 transitions. [2021-11-07 01:11:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:11:18,734 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:11:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:18,758 INFO L225 Difference]: With dead ends: 1603 [2021-11-07 01:11:18,758 INFO L226 Difference]: Without dead ends: 896 [2021-11-07 01:11:18,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:11:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-11-07 01:11:18,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2021-11-07 01:11:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 890 states have (on average 1.7191011235955056) internal successors, (1530), 895 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1530 transitions. [2021-11-07 01:11:18,886 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1530 transitions. Word has length 54 [2021-11-07 01:11:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:18,887 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1530 transitions. [2021-11-07 01:11:18,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1530 transitions. [2021-11-07 01:11:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:11:18,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:18,893 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:18,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:19,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:19,109 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:19,110 INFO L85 PathProgramCache]: Analyzing trace with hash 55627440, now seen corresponding path program 1 times [2021-11-07 01:11:19,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:19,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311995604] [2021-11-07 01:11:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:19,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:19,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:19,113 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:19,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:11:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:19,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:11:19,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:19,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:20,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:20,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311995604] [2021-11-07 01:11:20,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311995604] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:20,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:20,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:20,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326671264] [2021-11-07 01:11:20,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:20,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:20,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:20,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:20,043 INFO L87 Difference]: Start difference. First operand 896 states and 1530 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:20,212 INFO L93 Difference]: Finished difference Result 2658 states and 4542 transitions. [2021-11-07 01:11:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:20,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:11:20,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:20,231 INFO L225 Difference]: With dead ends: 2658 [2021-11-07 01:11:20,231 INFO L226 Difference]: Without dead ends: 1777 [2021-11-07 01:11:20,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-11-07 01:11:20,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 895. [2021-11-07 01:11:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 889 states have (on average 1.7154105736782903) internal successors, (1525), 894 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:20,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1525 transitions. [2021-11-07 01:11:20,342 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1525 transitions. Word has length 55 [2021-11-07 01:11:20,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:20,345 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1525 transitions. [2021-11-07 01:11:20,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1525 transitions. [2021-11-07 01:11:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:11:20,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:20,359 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:20,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:20,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:20,583 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:20,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:20,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1087425942, now seen corresponding path program 1 times [2021-11-07 01:11:20,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:20,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657076026] [2021-11-07 01:11:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:20,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:20,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:20,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:20,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:11:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:21,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:11:21,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:21,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:21,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:21,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657076026] [2021-11-07 01:11:21,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657076026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:21,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:21,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:21,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469176570] [2021-11-07 01:11:21,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:21,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:21,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:21,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:21,450 INFO L87 Difference]: Start difference. First operand 895 states and 1525 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:21,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:21,783 INFO L93 Difference]: Finished difference Result 3497 states and 5962 transitions. [2021-11-07 01:11:21,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:11:21,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:11:21,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:21,802 INFO L225 Difference]: With dead ends: 3497 [2021-11-07 01:11:21,802 INFO L226 Difference]: Without dead ends: 2620 [2021-11-07 01:11:21,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:11:21,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2021-11-07 01:11:21,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 894. [2021-11-07 01:11:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 888 states have (on average 1.712837837837838) internal successors, (1521), 893 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1521 transitions. [2021-11-07 01:11:21,878 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1521 transitions. Word has length 57 [2021-11-07 01:11:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:21,878 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1521 transitions. [2021-11-07 01:11:21,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1521 transitions. [2021-11-07 01:11:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:11:21,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:21,881 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:21,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:22,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:22,099 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2057193193, now seen corresponding path program 1 times [2021-11-07 01:11:22,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:22,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600544240] [2021-11-07 01:11:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:22,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:22,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:22,103 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:22,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:11:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:22,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:11:22,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:22,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:22,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:22,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600544240] [2021-11-07 01:11:22,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600544240] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:22,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:22,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:22,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631288095] [2021-11-07 01:11:22,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:22,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:22,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:22,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:22,891 INFO L87 Difference]: Start difference. First operand 894 states and 1521 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:22,992 INFO L93 Difference]: Finished difference Result 1785 states and 3039 transitions. [2021-11-07 01:11:22,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:22,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:11:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:22,999 INFO L225 Difference]: With dead ends: 1785 [2021-11-07 01:11:22,999 INFO L226 Difference]: Without dead ends: 899 [2021-11-07 01:11:23,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-11-07 01:11:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 894. [2021-11-07 01:11:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 888 states have (on average 1.7094594594594594) internal successors, (1518), 893 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1518 transitions. [2021-11-07 01:11:23,068 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1518 transitions. Word has length 58 [2021-11-07 01:11:23,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:23,068 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1518 transitions. [2021-11-07 01:11:23,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1518 transitions. [2021-11-07 01:11:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:11:23,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:23,071 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:23,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:23,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:23,293 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash 442006142, now seen corresponding path program 1 times [2021-11-07 01:11:23,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:23,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200543641] [2021-11-07 01:11:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:23,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:23,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:23,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:23,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:11:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:23,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:11:23,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:24,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:24,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:24,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200543641] [2021-11-07 01:11:24,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200543641] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:24,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:24,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:24,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052286114] [2021-11-07 01:11:24,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:24,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:24,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:24,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:24,247 INFO L87 Difference]: Start difference. First operand 894 states and 1518 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:24,736 INFO L93 Difference]: Finished difference Result 3484 states and 5938 transitions. [2021-11-07 01:11:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:11:24,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 59 [2021-11-07 01:11:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:24,753 INFO L225 Difference]: With dead ends: 3484 [2021-11-07 01:11:24,753 INFO L226 Difference]: Without dead ends: 2616 [2021-11-07 01:11:24,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:11:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-11-07 01:11:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 894. [2021-11-07 01:11:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 888 states have (on average 1.7060810810810811) internal successors, (1515), 893 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1515 transitions. [2021-11-07 01:11:24,892 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1515 transitions. Word has length 59 [2021-11-07 01:11:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:24,893 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1515 transitions. [2021-11-07 01:11:24,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1515 transitions. [2021-11-07 01:11:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:11:24,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:24,896 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] [2021-11-07 01:11:24,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:25,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:25,119 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:25,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:25,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1372824377, now seen corresponding path program 1 times [2021-11-07 01:11:25,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:25,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967829648] [2021-11-07 01:11:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:25,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:25,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:25,122 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:25,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:11:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:25,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:25,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:25,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:25,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967829648] [2021-11-07 01:11:25,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967829648] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:25,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:25,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:25,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388165880] [2021-11-07 01:11:25,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:25,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:25,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:25,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:25,910 INFO L87 Difference]: Start difference. First operand 894 states and 1515 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 01:11:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:26,082 INFO L93 Difference]: Finished difference Result 2369 states and 4003 transitions. [2021-11-07 01:11:26,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:26,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 61 [2021-11-07 01:11:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:26,093 INFO L225 Difference]: With dead ends: 2369 [2021-11-07 01:11:26,093 INFO L226 Difference]: Without dead ends: 1762 [2021-11-07 01:11:26,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2021-11-07 01:11:26,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1155. [2021-11-07 01:11:26,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1149 states have (on average 1.7362924281984333) internal successors, (1995), 1154 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:26,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1995 transitions. [2021-11-07 01:11:26,184 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1995 transitions. Word has length 61 [2021-11-07 01:11:26,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:26,185 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 1995 transitions. [2021-11-07 01:11:26,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 01:11:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1995 transitions. [2021-11-07 01:11:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:11:26,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:26,187 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:26,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:26,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:26,403 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:26,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:26,403 INFO L85 PathProgramCache]: Analyzing trace with hash 521636010, now seen corresponding path program 1 times [2021-11-07 01:11:26,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:26,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706730617] [2021-11-07 01:11:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:26,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:26,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:26,408 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:26,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:11:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:26,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:26,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:27,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:27,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:27,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706730617] [2021-11-07 01:11:27,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706730617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:27,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:27,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:27,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808462134] [2021-11-07 01:11:27,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:27,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:27,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:27,264 INFO L87 Difference]: Start difference. First operand 1155 states and 1995 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:27,419 INFO L93 Difference]: Finished difference Result 3042 states and 5244 transitions. [2021-11-07 01:11:27,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:27,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:11:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:27,432 INFO L225 Difference]: With dead ends: 3042 [2021-11-07 01:11:27,432 INFO L226 Difference]: Without dead ends: 1971 [2021-11-07 01:11:27,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-11-07 01:11:27,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1364. [2021-11-07 01:11:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1358 states have (on average 1.7511045655375552) internal successors, (2378), 1363 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 2378 transitions. [2021-11-07 01:11:27,538 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 2378 transitions. Word has length 73 [2021-11-07 01:11:27,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:27,538 INFO L470 AbstractCegarLoop]: Abstraction has 1364 states and 2378 transitions. [2021-11-07 01:11:27,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:27,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 2378 transitions. [2021-11-07 01:11:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:11:27,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:27,542 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:27,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:27,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:27,756 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:27,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash 346921417, now seen corresponding path program 1 times [2021-11-07 01:11:27,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:27,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22119286] [2021-11-07 01:11:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:27,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:27,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:27,759 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:27,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:11:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:28,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:28,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:28,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:28,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:28,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22119286] [2021-11-07 01:11:28,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22119286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:28,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:28,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:28,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166933963] [2021-11-07 01:11:28,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:28,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:28,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:28,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:28,609 INFO L87 Difference]: Start difference. First operand 1364 states and 2378 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:28,774 INFO L93 Difference]: Finished difference Result 3701 states and 6458 transitions. [2021-11-07 01:11:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:11:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:28,789 INFO L225 Difference]: With dead ends: 3701 [2021-11-07 01:11:28,789 INFO L226 Difference]: Without dead ends: 2429 [2021-11-07 01:11:28,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-11-07 01:11:28,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1822. [2021-11-07 01:11:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1816 states have (on average 1.7731277533039647) internal successors, (3220), 1821 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 3220 transitions. [2021-11-07 01:11:28,934 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 3220 transitions. Word has length 74 [2021-11-07 01:11:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:28,934 INFO L470 AbstractCegarLoop]: Abstraction has 1822 states and 3220 transitions. [2021-11-07 01:11:28,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:28,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 3220 transitions. [2021-11-07 01:11:28,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:11:28,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:28,939 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:28,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:29,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:29,153 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:29,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:29,154 INFO L85 PathProgramCache]: Analyzing trace with hash -493792424, now seen corresponding path program 1 times [2021-11-07 01:11:29,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:29,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819771265] [2021-11-07 01:11:29,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:29,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:29,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:29,156 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:29,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:11:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:29,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:29,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:29,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:30,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:30,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819771265] [2021-11-07 01:11:30,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819771265] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:30,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:30,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:30,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245815782] [2021-11-07 01:11:30,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:30,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:30,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:30,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:30,087 INFO L87 Difference]: Start difference. First operand 1822 states and 3220 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:30,300 INFO L93 Difference]: Finished difference Result 5055 states and 8953 transitions. [2021-11-07 01:11:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:11:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:30,321 INFO L225 Difference]: With dead ends: 5055 [2021-11-07 01:11:30,321 INFO L226 Difference]: Without dead ends: 3333 [2021-11-07 01:11:30,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:30,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2021-11-07 01:11:30,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 2726. [2021-11-07 01:11:30,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2726 states, 2720 states have (on average 1.795220588235294) internal successors, (4883), 2725 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2726 states to 2726 states and 4883 transitions. [2021-11-07 01:11:30,544 INFO L78 Accepts]: Start accepts. Automaton has 2726 states and 4883 transitions. Word has length 75 [2021-11-07 01:11:30,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:30,545 INFO L470 AbstractCegarLoop]: Abstraction has 2726 states and 4883 transitions. [2021-11-07 01:11:30,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:30,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2726 states and 4883 transitions. [2021-11-07 01:11:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:11:30,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:30,551 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:30,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:30,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:30,766 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:30,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:30,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1382076632, now seen corresponding path program 1 times [2021-11-07 01:11:30,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:30,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987849579] [2021-11-07 01:11:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:30,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:30,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:30,768 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:30,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:11:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:31,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:31,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:31,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:31,606 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 01:11:31,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:31,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987849579] [2021-11-07 01:11:31,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987849579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:31,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:31,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:31,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191364343] [2021-11-07 01:11:31,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:31,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:31,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:31,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:31,608 INFO L87 Difference]: Start difference. First operand 2726 states and 4883 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:31,869 INFO L93 Difference]: Finished difference Result 7503 states and 13461 transitions. [2021-11-07 01:11:31,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:31,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:11:31,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:31,920 INFO L225 Difference]: With dead ends: 7503 [2021-11-07 01:11:31,920 INFO L226 Difference]: Without dead ends: 4911 [2021-11-07 01:11:31,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2021-11-07 01:11:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 4304. [2021-11-07 01:11:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 4298 states have (on average 1.8110749185667752) internal successors, (7784), 4303 states have internal predecessors, (7784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 7784 transitions. [2021-11-07 01:11:32,219 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 7784 transitions. Word has length 76 [2021-11-07 01:11:32,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:32,219 INFO L470 AbstractCegarLoop]: Abstraction has 4304 states and 7784 transitions. [2021-11-07 01:11:32,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:32,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 7784 transitions. [2021-11-07 01:11:32,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:11:32,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:32,227 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:32,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:32,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:32,442 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:32,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:32,443 INFO L85 PathProgramCache]: Analyzing trace with hash -802677687, now seen corresponding path program 1 times [2021-11-07 01:11:32,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:32,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807440457] [2021-11-07 01:11:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:32,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:32,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:32,444 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:32,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:11:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:33,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:33,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:33,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:33,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:33,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807440457] [2021-11-07 01:11:33,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807440457] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:33,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:33,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:33,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539711851] [2021-11-07 01:11:33,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:33,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:33,366 INFO L87 Difference]: Start difference. First operand 4304 states and 7784 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:33,847 INFO L93 Difference]: Finished difference Result 11953 states and 21647 transitions. [2021-11-07 01:11:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:11:33,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:33,881 INFO L225 Difference]: With dead ends: 11953 [2021-11-07 01:11:33,881 INFO L226 Difference]: Without dead ends: 7817 [2021-11-07 01:11:33,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:33,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7817 states. [2021-11-07 01:11:34,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7817 to 7210. [2021-11-07 01:11:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7210 states, 7204 states have (on average 1.8213492504164353) internal successors, (13121), 7209 states have internal predecessors, (13121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7210 states to 7210 states and 13121 transitions. [2021-11-07 01:11:34,378 INFO L78 Accepts]: Start accepts. Automaton has 7210 states and 13121 transitions. Word has length 77 [2021-11-07 01:11:34,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:34,379 INFO L470 AbstractCegarLoop]: Abstraction has 7210 states and 13121 transitions. [2021-11-07 01:11:34,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:34,380 INFO L276 IsEmpty]: Start isEmpty. Operand 7210 states and 13121 transitions. [2021-11-07 01:11:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:11:34,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:34,390 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:34,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:34,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:34,605 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:34,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1188061015, now seen corresponding path program 1 times [2021-11-07 01:11:34,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:34,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297196140] [2021-11-07 01:11:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:34,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:34,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:34,607 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:34,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:11:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:35,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:35,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:35,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:35,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297196140] [2021-11-07 01:11:35,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297196140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:35,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:35,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:35,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368429450] [2021-11-07 01:11:35,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:35,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:35,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:35,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:35,554 INFO L87 Difference]: Start difference. First operand 7210 states and 13121 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:36,046 INFO L93 Difference]: Finished difference Result 20997 states and 38269 transitions. [2021-11-07 01:11:36,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:36,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:11:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:36,085 INFO L225 Difference]: With dead ends: 20997 [2021-11-07 01:11:36,085 INFO L226 Difference]: Without dead ends: 13963 [2021-11-07 01:11:36,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13963 states. [2021-11-07 01:11:36,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13963 to 13356. [2021-11-07 01:11:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13356 states, 13350 states have (on average 1.827865168539326) internal successors, (24402), 13355 states have internal predecessors, (24402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13356 states to 13356 states and 24402 transitions. [2021-11-07 01:11:36,784 INFO L78 Accepts]: Start accepts. Automaton has 13356 states and 24402 transitions. Word has length 78 [2021-11-07 01:11:36,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:36,784 INFO L470 AbstractCegarLoop]: Abstraction has 13356 states and 24402 transitions. [2021-11-07 01:11:36,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 13356 states and 24402 transitions. [2021-11-07 01:11:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:11:36,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:36,796 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:36,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:37,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:37,012 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:37,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:37,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1875148327, now seen corresponding path program 1 times [2021-11-07 01:11:37,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:37,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801342026] [2021-11-07 01:11:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:37,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:37,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:37,014 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:37,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:11:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:37,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:37,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:11:37,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:11:38,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:38,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801342026] [2021-11-07 01:11:38,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801342026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:38,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:38,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:38,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190194920] [2021-11-07 01:11:38,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:38,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:38,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:38,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:38,097 INFO L87 Difference]: Start difference. First operand 13356 states and 24402 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:41,081 INFO L93 Difference]: Finished difference Result 33165 states and 60571 transitions. [2021-11-07 01:11:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:11:41,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:11:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:41,175 INFO L225 Difference]: With dead ends: 33165 [2021-11-07 01:11:41,175 INFO L226 Difference]: Without dead ends: 20106 [2021-11-07 01:11:41,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:11:41,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20106 states. [2021-11-07 01:11:41,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20106 to 13323. [2021-11-07 01:11:41,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13323 states, 13317 states have (on average 1.8224825411128633) internal successors, (24270), 13322 states have internal predecessors, (24270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13323 states to 13323 states and 24270 transitions. [2021-11-07 01:11:41,865 INFO L78 Accepts]: Start accepts. Automaton has 13323 states and 24270 transitions. Word has length 79 [2021-11-07 01:11:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:41,866 INFO L470 AbstractCegarLoop]: Abstraction has 13323 states and 24270 transitions. [2021-11-07 01:11:41,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand 13323 states and 24270 transitions. [2021-11-07 01:11:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:11:41,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:41,877 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:41,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:42,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:42,092 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2095592328, now seen corresponding path program 1 times [2021-11-07 01:11:42,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:42,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547005965] [2021-11-07 01:11:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:42,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:42,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:42,094 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:42,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:11:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:42,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:42,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:42,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:43,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:43,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547005965] [2021-11-07 01:11:43,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547005965] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:43,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:43,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:43,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48737221] [2021-11-07 01:11:43,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:43,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:43,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:43,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:43,109 INFO L87 Difference]: Start difference. First operand 13323 states and 24270 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:43,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:43,970 INFO L93 Difference]: Finished difference Result 39168 states and 71423 transitions. [2021-11-07 01:11:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:43,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:11:43,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:44,027 INFO L225 Difference]: With dead ends: 39168 [2021-11-07 01:11:44,027 INFO L226 Difference]: Without dead ends: 26028 [2021-11-07 01:11:44,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:44,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26028 states. [2021-11-07 01:11:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26028 to 25421. [2021-11-07 01:11:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25421 states, 25415 states have (on average 1.82502459177651) internal successors, (46383), 25420 states have internal predecessors, (46383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25421 states to 25421 states and 46383 transitions. [2021-11-07 01:11:45,657 INFO L78 Accepts]: Start accepts. Automaton has 25421 states and 46383 transitions. Word has length 79 [2021-11-07 01:11:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:45,658 INFO L470 AbstractCegarLoop]: Abstraction has 25421 states and 46383 transitions. [2021-11-07 01:11:45,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 25421 states and 46383 transitions. [2021-11-07 01:11:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:11:45,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:45,673 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:45,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:45,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:45,888 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:45,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1863774408, now seen corresponding path program 1 times [2021-11-07 01:11:45,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:45,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836264169] [2021-11-07 01:11:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:45,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:45,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:45,889 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:45,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:11:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:46,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:46,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:46,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:46,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:46,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836264169] [2021-11-07 01:11:46,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836264169] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:46,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:46,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:46,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233788836] [2021-11-07 01:11:46,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:46,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:46,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:46,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:46,934 INFO L87 Difference]: Start difference. First operand 25421 states and 46383 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:48,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:48,621 INFO L93 Difference]: Finished difference Result 70101 states and 127498 transitions. [2021-11-07 01:11:48,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:48,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 01:11:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:48,696 INFO L225 Difference]: With dead ends: 70101 [2021-11-07 01:11:48,696 INFO L226 Difference]: Without dead ends: 44910 [2021-11-07 01:11:48,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:48,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44910 states. [2021-11-07 01:11:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44910 to 44303. [2021-11-07 01:11:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44303 states, 44297 states have (on average 1.8142989367225772) internal successors, (80368), 44302 states have internal predecessors, (80368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44303 states to 44303 states and 80368 transitions. [2021-11-07 01:11:51,061 INFO L78 Accepts]: Start accepts. Automaton has 44303 states and 80368 transitions. Word has length 80 [2021-11-07 01:11:51,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:51,061 INFO L470 AbstractCegarLoop]: Abstraction has 44303 states and 80368 transitions. [2021-11-07 01:11:51,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 44303 states and 80368 transitions. [2021-11-07 01:11:51,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:11:51,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:51,077 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:51,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:51,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:51,279 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:51,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:51,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1715832033, now seen corresponding path program 1 times [2021-11-07 01:11:51,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:51,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244601327] [2021-11-07 01:11:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:51,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:51,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:51,282 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:51,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:11:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:52,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:52,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:11:52,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:11:52,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:52,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244601327] [2021-11-07 01:11:52,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244601327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:52,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:52,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:52,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437276026] [2021-11-07 01:11:52,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:52,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:52,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:52,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:52,483 INFO L87 Difference]: Start difference. First operand 44303 states and 80368 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:59,799 INFO L93 Difference]: Finished difference Result 172480 states and 312773 transitions. [2021-11-07 01:11:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:11:59,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:11:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:00,040 INFO L225 Difference]: With dead ends: 172480 [2021-11-07 01:12:00,040 INFO L226 Difference]: Without dead ends: 128473 [2021-11-07 01:12:00,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:12:00,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128473 states. [2021-11-07 01:12:03,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128473 to 44045. [2021-11-07 01:12:03,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44045 states, 44039 states have (on average 1.8014941302027747) internal successors, (79336), 44044 states have internal predecessors, (79336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:03,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44045 states to 44045 states and 79336 transitions. [2021-11-07 01:12:03,220 INFO L78 Accepts]: Start accepts. Automaton has 44045 states and 79336 transitions. Word has length 81 [2021-11-07 01:12:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:03,221 INFO L470 AbstractCegarLoop]: Abstraction has 44045 states and 79336 transitions. [2021-11-07 01:12:03,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 44045 states and 79336 transitions. [2021-11-07 01:12:03,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:12:03,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:03,230 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:03,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:03,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:03,431 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:12:03,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:03,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1684316733, now seen corresponding path program 1 times [2021-11-07 01:12:03,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:03,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143449002] [2021-11-07 01:12:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:03,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:03,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:03,433 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:03,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:12:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:04,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:12:04,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:04,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:04,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:04,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143449002] [2021-11-07 01:12:04,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143449002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:04,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:04,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:12:04,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129386239] [2021-11-07 01:12:04,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:12:04,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:04,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:12:04,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:12:04,580 INFO L87 Difference]: Start difference. First operand 44045 states and 79336 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:06,690 INFO L93 Difference]: Finished difference Result 88395 states and 159166 transitions. [2021-11-07 01:12:06,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:06,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:12:06,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:06,764 INFO L225 Difference]: With dead ends: 88395 [2021-11-07 01:12:06,765 INFO L226 Difference]: Without dead ends: 44652 [2021-11-07 01:12:06,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:12:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44652 states. [2021-11-07 01:12:08,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44652 to 44045. [2021-11-07 01:12:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44045 states, 44039 states have (on average 1.798587615522605) internal successors, (79208), 44044 states have internal predecessors, (79208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:08,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44045 states to 44045 states and 79208 transitions. [2021-11-07 01:12:08,914 INFO L78 Accepts]: Start accepts. Automaton has 44045 states and 79208 transitions. Word has length 81 [2021-11-07 01:12:08,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:08,914 INFO L470 AbstractCegarLoop]: Abstraction has 44045 states and 79208 transitions. [2021-11-07 01:12:08,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 44045 states and 79208 transitions. [2021-11-07 01:12:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:12:08,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:08,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:08,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:09,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:09,125 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:12:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1517057814, now seen corresponding path program 1 times [2021-11-07 01:12:09,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:09,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487135120] [2021-11-07 01:12:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:09,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:09,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:09,126 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:09,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f123cf3a-ff58-4895-8206-b2ce6f790d11/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:12:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:09,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:12:09,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:10,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:10,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:10,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487135120] [2021-11-07 01:12:10,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487135120] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:10,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:10,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:12:10,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769886229] [2021-11-07 01:12:10,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:10,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:10,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:10,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:10,244 INFO L87 Difference]: Start difference. First operand 44045 states and 79208 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:13,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:13,766 INFO L93 Difference]: Finished difference Result 123637 states and 222088 transitions. [2021-11-07 01:12:13,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:13,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:12:13,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:13,894 INFO L225 Difference]: With dead ends: 123637 [2021-11-07 01:12:13,894 INFO L226 Difference]: Without dead ends: 79854 [2021-11-07 01:12:13,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79854 states.