./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product19.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_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/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_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/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_6118e278-7123-45e2-b7b2-2794f300d122/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 f3a1dbda837d8ce3c466139238aee66f09284cf7efb22d92a7aae56a5f98c665 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:47:21,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:47:21,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:47:21,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:47:21,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:47:21,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:47:21,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:47:21,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:47:21,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:47:21,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:47:21,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:47:21,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:47:21,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:47:21,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:47:21,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:47:21,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:47:21,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:47:21,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:47:21,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:47:21,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:47:21,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:47:21,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:47:21,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:47:21,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:47:21,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:47:21,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:47:21,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:47:21,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:47:21,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:47:21,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:47:21,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:47:21,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:47:21,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:47:21,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:47:21,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:47:21,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:47:21,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:47:21,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:47:21,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:47:21,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:47:21,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:47:21,766 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:47:21,830 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:47:21,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:47:21,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:47:21,833 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:47:21,833 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:47:21,833 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:47:21,833 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:47:21,834 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:47:21,841 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:47:21,842 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:47:21,843 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:47:21,843 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:47:21,844 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:47:21,844 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:47:21,844 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:47:21,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:47:21,845 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:47:21,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:47:21,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:47:21,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:47:21,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:47:21,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:47:21,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:47:21,847 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:47:21,847 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:47:21,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:47:21,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:47:21,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:47:21,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:47:21,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:47:21,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:47:21,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:47:21,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:47:21,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:47:21,852 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:47:21,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:47:21,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:47:21,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:47:21,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:47:21,853 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_6118e278-7123-45e2-b7b2-2794f300d122/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3a1dbda837d8ce3c466139238aee66f09284cf7efb22d92a7aae56a5f98c665 [2021-11-07 01:47:22,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:47:22,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:47:22,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:47:22,192 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:47:22,193 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:47:22,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product19.cil.c [2021-11-07 01:47:22,270 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/data/2c4a3b23d/50bc4a783ebb41d88de0bc8cabe5d965/FLAG4aa46dc69 [2021-11-07 01:47:23,078 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:47:23,082 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/sv-benchmarks/c/product-lines/email_spec4_product19.cil.c [2021-11-07 01:47:23,115 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/data/2c4a3b23d/50bc4a783ebb41d88de0bc8cabe5d965/FLAG4aa46dc69 [2021-11-07 01:47:23,197 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/data/2c4a3b23d/50bc4a783ebb41d88de0bc8cabe5d965 [2021-11-07 01:47:23,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:47:23,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:47:23,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:47:23,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:47:23,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:47:23,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:47:23" (1/1) ... [2021-11-07 01:47:23,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73cfe30f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:23, skipping insertion in model container [2021-11-07 01:47:23,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:47:23" (1/1) ... [2021-11-07 01:47:23,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:47:23,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:47:23,574 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_6118e278-7123-45e2-b7b2-2794f300d122/sv-benchmarks/c/product-lines/email_spec4_product19.cil.c[1542,1555] [2021-11-07 01:47:24,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:47:24,018 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 01:47:24,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a6a8591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:24, skipping insertion in model container [2021-11-07 01:47:24,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:47:24,030 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:47:24,031 INFO L168 Benchmark]: Toolchain (without parser) took 828.62 ms. Allocated memory is still 102.8 MB. Free memory was 68.5 MB in the beginning and 66.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:47:24,033 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 102.8 MB. Free memory is still 58.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:47:24,035 INFO L168 Benchmark]: CACSL2BoogieTranslator took 823.57 ms. Allocated memory is still 102.8 MB. Free memory was 68.2 MB in the beginning and 66.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:47:24,037 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 102.8 MB. Free memory is still 58.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 823.57 ms. Allocated memory is still 102.8 MB. Free memory was 68.2 MB in the beginning and 66.3 MB in the end (delta: 2.0 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: 165]: 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_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/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_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/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_6118e278-7123-45e2-b7b2-2794f300d122/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 f3a1dbda837d8ce3c466139238aee66f09284cf7efb22d92a7aae56a5f98c665 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:47:26,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:47:26,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:47:26,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:47:26,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:47:26,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:47:26,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:47:26,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:47:26,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:47:26,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:47:26,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:47:26,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:47:26,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:47:26,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:47:26,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:47:26,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:47:26,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:47:26,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:47:26,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:47:26,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:47:26,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:47:26,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:47:26,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:47:26,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:47:26,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:47:26,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:47:26,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:47:26,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:47:26,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:47:26,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:47:26,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:47:26,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:47:26,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:47:26,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:47:26,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:47:26,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:47:26,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:47:26,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:47:26,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:47:26,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:47:26,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:47:26,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:47:26,853 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:47:26,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:47:26,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:47:26,855 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:47:26,855 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:47:26,855 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:47:26,855 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:47:26,856 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:47:26,856 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:47:26,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:47:26,859 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:47:26,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:47:26,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:47:26,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:47:26,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:47:26,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:47:26,860 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:47:26,860 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:47:26,861 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:47:26,861 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:47:26,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:47:26,861 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:47:26,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:47:26,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:47:26,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:47:26,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:47:26,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:47:26,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:47:26,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:47:26,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:47:26,864 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:47:26,864 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:26,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:47:26,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:47:26,865 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:47:26,865 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_6118e278-7123-45e2-b7b2-2794f300d122/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3a1dbda837d8ce3c466139238aee66f09284cf7efb22d92a7aae56a5f98c665 [2021-11-07 01:47:27,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:47:27,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:47:27,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:47:27,339 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:47:27,340 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:47:27,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product19.cil.c [2021-11-07 01:47:27,422 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/data/78480ff33/90d4eafd142e4a2581b4deb489b69864/FLAG87ee2a185 [2021-11-07 01:47:28,324 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:47:28,325 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/sv-benchmarks/c/product-lines/email_spec4_product19.cil.c [2021-11-07 01:47:28,348 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/data/78480ff33/90d4eafd142e4a2581b4deb489b69864/FLAG87ee2a185 [2021-11-07 01:47:28,483 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/data/78480ff33/90d4eafd142e4a2581b4deb489b69864 [2021-11-07 01:47:28,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:47:28,487 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:47:28,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:47:28,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:47:28,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:47:28,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:47:28" (1/1) ... [2021-11-07 01:47:28,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62f414ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:28, skipping insertion in model container [2021-11-07 01:47:28,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:47:28" (1/1) ... [2021-11-07 01:47:28,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:47:28,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:47:28,806 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_6118e278-7123-45e2-b7b2-2794f300d122/sv-benchmarks/c/product-lines/email_spec4_product19.cil.c[1542,1555] [2021-11-07 01:47:29,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:47:29,415 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:47:29,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:47:29,444 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_6118e278-7123-45e2-b7b2-2794f300d122/sv-benchmarks/c/product-lines/email_spec4_product19.cil.c[1542,1555] [2021-11-07 01:47:29,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:47:29,587 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:47:29,603 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_6118e278-7123-45e2-b7b2-2794f300d122/sv-benchmarks/c/product-lines/email_spec4_product19.cil.c[1542,1555] [2021-11-07 01:47:29,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:47:29,779 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:47:29,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:29 WrapperNode [2021-11-07 01:47:29,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:47:29,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:47:29,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:47:29,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:47:29,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:29" (1/1) ... [2021-11-07 01:47:29,864 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:29" (1/1) ... [2021-11-07 01:47:30,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:47:30,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:47:30,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:47:30,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:47:30,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:29" (1/1) ... [2021-11-07 01:47:30,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:29" (1/1) ... [2021-11-07 01:47:30,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:29" (1/1) ... [2021-11-07 01:47:30,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:29" (1/1) ... [2021-11-07 01:47:30,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:29" (1/1) ... [2021-11-07 01:47:30,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:29" (1/1) ... [2021-11-07 01:47:30,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:29" (1/1) ... [2021-11-07 01:47:30,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:47:30,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:47:30,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:47:30,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:47:30,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:29" (1/1) ... [2021-11-07 01:47:30,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:47:30,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:47:30,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:47:30,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:47:30,286 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:47:30,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:47:30,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:47:30,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:47:30,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:47:35,036 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:47:35,036 INFO L299 CfgBuilder]: Removed 299 assume(true) statements. [2021-11-07 01:47:35,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:47:35 BoogieIcfgContainer [2021-11-07 01:47:35,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:47:35,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:47:35,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:47:35,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:47:35,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:47:28" (1/3) ... [2021-11-07 01:47:35,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee567f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:47:35, skipping insertion in model container [2021-11-07 01:47:35,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:29" (2/3) ... [2021-11-07 01:47:35,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee567f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:47:35, skipping insertion in model container [2021-11-07 01:47:35,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:47:35" (3/3) ... [2021-11-07 01:47:35,055 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product19.cil.c [2021-11-07 01:47:35,062 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:47:35,062 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:47:35,129 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:47:35,137 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 01:47:35,137 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:47:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 449 states, 446 states have (on average 1.7443946188340806) internal successors, (778), 448 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:35,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:47:35,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:35,184 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] [2021-11-07 01:47:35,185 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:35,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:35,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1399872387, now seen corresponding path program 1 times [2021-11-07 01:47:35,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:35,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923355297] [2021-11-07 01:47:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:35,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:35,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:35,217 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:35,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:47:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:35,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:47:35,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:35,840 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 01:47:35,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:35,972 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 01:47:35,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:35,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923355297] [2021-11-07 01:47:35,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923355297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:35,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:35,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:47:35,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992129069] [2021-11-07 01:47:35,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:47:35,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:36,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:47:36,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:47:36,012 INFO L87 Difference]: Start difference. First operand has 449 states, 446 states have (on average 1.7443946188340806) internal successors, (778), 448 states have internal predecessors, (778), 0 states have call successors, (0), 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 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:36,110 INFO L93 Difference]: Finished difference Result 656 states and 1115 transitions. [2021-11-07 01:47:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:47:36,112 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-07 01:47:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:36,142 INFO L225 Difference]: With dead ends: 656 [2021-11-07 01:47:36,143 INFO L226 Difference]: Without dead ends: 379 [2021-11-07 01:47:36,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 78 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 01:47:36,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-07 01:47:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2021-11-07 01:47:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 377 states have (on average 1.7453580901856764) internal successors, (658), 378 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 658 transitions. [2021-11-07 01:47:36,270 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 658 transitions. Word has length 40 [2021-11-07 01:47:36,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:36,271 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 658 transitions. [2021-11-07 01:47:36,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:36,272 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 658 transitions. [2021-11-07 01:47:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:47:36,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:36,286 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] [2021-11-07 01:47:36,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:36,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:36,515 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:36,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:36,520 INFO L85 PathProgramCache]: Analyzing trace with hash 710632112, now seen corresponding path program 1 times [2021-11-07 01:47:36,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:36,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198586236] [2021-11-07 01:47:36,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:36,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:36,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:36,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:36,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:47:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:36,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:47:36,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:37,131 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 01:47:37,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:37,261 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 01:47:37,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:37,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198586236] [2021-11-07 01:47:37,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198586236] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:37,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:37,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:47:37,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148761040] [2021-11-07 01:47:37,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:47:37,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:37,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:47:37,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:47:37,267 INFO L87 Difference]: Start difference. First operand 379 states and 658 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:37,369 INFO L93 Difference]: Finished difference Result 1107 states and 1926 transitions. [2021-11-07 01:47:37,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:47:37,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 41 [2021-11-07 01:47:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:37,376 INFO L225 Difference]: With dead ends: 1107 [2021-11-07 01:47:37,377 INFO L226 Difference]: Without dead ends: 743 [2021-11-07 01:47:37,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 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 01:47:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-11-07 01:47:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 378. [2021-11-07 01:47:37,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 376 states have (on average 1.7367021276595744) internal successors, (653), 377 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 653 transitions. [2021-11-07 01:47:37,461 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 653 transitions. Word has length 41 [2021-11-07 01:47:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:37,463 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 653 transitions. [2021-11-07 01:47:37,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 653 transitions. [2021-11-07 01:47:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:47:37,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:37,474 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] [2021-11-07 01:47:37,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:37,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:37,691 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:37,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1776628714, now seen corresponding path program 1 times [2021-11-07 01:47:37,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:37,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887537428] [2021-11-07 01:47:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:37,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:37,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:37,694 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:37,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:47:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:38,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:47:38,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:38,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:38,422 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 01:47:38,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:38,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887537428] [2021-11-07 01:47:38,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887537428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:38,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:38,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:47:38,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601659053] [2021-11-07 01:47:38,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:47:38,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:38,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:47:38,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:47:38,426 INFO L87 Difference]: Start difference. First operand 378 states and 653 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:38,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:38,715 INFO L93 Difference]: Finished difference Result 1429 states and 2474 transitions. [2021-11-07 01:47:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:47:38,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 01:47:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:38,725 INFO L225 Difference]: With dead ends: 1429 [2021-11-07 01:47:38,726 INFO L226 Difference]: Without dead ends: 1069 [2021-11-07 01:47:38,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 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 01:47:38,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-11-07 01:47:38,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 377. [2021-11-07 01:47:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 375 states have (on average 1.7306666666666666) internal successors, (649), 376 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 649 transitions. [2021-11-07 01:47:38,769 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 649 transitions. Word has length 43 [2021-11-07 01:47:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:38,770 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 649 transitions. [2021-11-07 01:47:38,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 649 transitions. [2021-11-07 01:47:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:47:38,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:38,772 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] [2021-11-07 01:47:38,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:38,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:38,989 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:38,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:38,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1886338391, now seen corresponding path program 1 times [2021-11-07 01:47:38,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:38,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168466784] [2021-11-07 01:47:38,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:38,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:38,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:38,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:39,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:47:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:39,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:47:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:39,698 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 01:47:39,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:39,850 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 01:47:39,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:39,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168466784] [2021-11-07 01:47:39,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168466784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:39,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:39,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:47:39,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107494091] [2021-11-07 01:47:39,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:47:39,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:39,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:47:39,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:47:39,856 INFO L87 Difference]: Start difference. First operand 377 states and 649 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:39,959 INFO L93 Difference]: Finished difference Result 751 states and 1295 transitions. [2021-11-07 01:47:39,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:47:39,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 44 [2021-11-07 01:47:39,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:39,963 INFO L225 Difference]: With dead ends: 751 [2021-11-07 01:47:39,964 INFO L226 Difference]: Without dead ends: 382 [2021-11-07 01:47:39,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 84 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 01:47:39,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-07 01:47:39,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 377. [2021-11-07 01:47:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 375 states have (on average 1.7226666666666666) internal successors, (646), 376 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 646 transitions. [2021-11-07 01:47:39,999 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 646 transitions. Word has length 44 [2021-11-07 01:47:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:39,999 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 646 transitions. [2021-11-07 01:47:40,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:40,000 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 646 transitions. [2021-11-07 01:47:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:47:40,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:40,002 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:40,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:40,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:40,223 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:40,224 INFO L85 PathProgramCache]: Analyzing trace with hash 545107710, now seen corresponding path program 1 times [2021-11-07 01:47:40,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:40,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453644623] [2021-11-07 01:47:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:40,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:40,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:40,227 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:40,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:47:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:47:40,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:40,800 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 01:47:40,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:40,961 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 01:47:40,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:40,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453644623] [2021-11-07 01:47:40,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453644623] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:40,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:40,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:47:40,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390970181] [2021-11-07 01:47:40,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:47:40,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:40,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:47:40,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:47:40,965 INFO L87 Difference]: Start difference. First operand 377 states and 646 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:41,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:41,200 INFO L93 Difference]: Finished difference Result 1416 states and 2450 transitions. [2021-11-07 01:47:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:47:41,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:47:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:41,208 INFO L225 Difference]: With dead ends: 1416 [2021-11-07 01:47:41,208 INFO L226 Difference]: Without dead ends: 1065 [2021-11-07 01:47:41,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 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 01:47:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-11-07 01:47:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 377. [2021-11-07 01:47:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 375 states have (on average 1.7146666666666666) internal successors, (643), 376 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 643 transitions. [2021-11-07 01:47:41,245 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 643 transitions. Word has length 45 [2021-11-07 01:47:41,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:41,245 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 643 transitions. [2021-11-07 01:47:41,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:41,246 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 643 transitions. [2021-11-07 01:47:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:47:41,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:41,247 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] [2021-11-07 01:47:41,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:41,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:41,462 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:41,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:41,462 INFO L85 PathProgramCache]: Analyzing trace with hash 52095737, now seen corresponding path program 1 times [2021-11-07 01:47:41,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:41,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740000705] [2021-11-07 01:47:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:41,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:41,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:41,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:41,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:47:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:41,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:47:41,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:42,017 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 01:47:42,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:42,166 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 01:47:42,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:42,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740000705] [2021-11-07 01:47:42,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740000705] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:42,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:42,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:47:42,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330811431] [2021-11-07 01:47:42,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:47:42,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:42,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:47:42,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:47:42,172 INFO L87 Difference]: Start difference. First operand 377 states and 643 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:42,258 INFO L93 Difference]: Finished difference Result 865 states and 1476 transitions. [2021-11-07 01:47:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:47:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 47 [2021-11-07 01:47:42,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:42,264 INFO L225 Difference]: With dead ends: 865 [2021-11-07 01:47:42,265 INFO L226 Difference]: Without dead ends: 728 [2021-11-07 01:47:42,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 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 01:47:42,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-11-07 01:47:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 591. [2021-11-07 01:47:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 589 states have (on average 1.7555178268251272) internal successors, (1034), 590 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:42,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1034 transitions. [2021-11-07 01:47:42,326 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1034 transitions. Word has length 47 [2021-11-07 01:47:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:42,327 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 1034 transitions. [2021-11-07 01:47:42,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:42,327 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1034 transitions. [2021-11-07 01:47:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:47:42,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:42,330 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 01:47:42,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:42,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:42,549 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash 844050506, now seen corresponding path program 1 times [2021-11-07 01:47:42,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:42,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979654440] [2021-11-07 01:47:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:42,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:42,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:42,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:42,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:47:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:43,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:47:43,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:43,209 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 01:47:43,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:43,382 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 01:47:43,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:43,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979654440] [2021-11-07 01:47:43,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979654440] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:43,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:43,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:47:43,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80662712] [2021-11-07 01:47:43,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:47:43,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:43,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:47:43,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:47:43,384 INFO L87 Difference]: Start difference. First operand 591 states and 1034 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:43,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:43,485 INFO L93 Difference]: Finished difference Result 1397 states and 2450 transitions. [2021-11-07 01:47:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:47:43,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:47:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:43,492 INFO L225 Difference]: With dead ends: 1397 [2021-11-07 01:47:43,493 INFO L226 Difference]: Without dead ends: 890 [2021-11-07 01:47:43,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 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 01:47:43,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-11-07 01:47:43,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 753. [2021-11-07 01:47:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 751 states have (on average 1.7683089214380825) internal successors, (1328), 752 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1328 transitions. [2021-11-07 01:47:43,560 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1328 transitions. Word has length 59 [2021-11-07 01:47:43,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:43,561 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 1328 transitions. [2021-11-07 01:47:43,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:43,561 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1328 transitions. [2021-11-07 01:47:43,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:47:43,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:43,563 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:43,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:43,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:43,779 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:43,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1346235479, now seen corresponding path program 1 times [2021-11-07 01:47:43,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:43,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854568463] [2021-11-07 01:47:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:43,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:43,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:43,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:43,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:47:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:44,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:47:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:44,481 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 01:47:44,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:44,619 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 01:47:44,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:44,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854568463] [2021-11-07 01:47:44,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854568463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:44,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:44,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:47:44,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124184979] [2021-11-07 01:47:44,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:47:44,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:44,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:47:44,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:47:44,622 INFO L87 Difference]: Start difference. First operand 753 states and 1328 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:44,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:44,752 INFO L93 Difference]: Finished difference Result 1927 states and 3418 transitions. [2021-11-07 01:47:44,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:47:44,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:47:44,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:44,767 INFO L225 Difference]: With dead ends: 1927 [2021-11-07 01:47:44,767 INFO L226 Difference]: Without dead ends: 1262 [2021-11-07 01:47:44,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 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 01:47:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-11-07 01:47:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1125. [2021-11-07 01:47:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1123 states have (on average 1.786286731967943) internal successors, (2006), 1124 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2006 transitions. [2021-11-07 01:47:44,888 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2006 transitions. Word has length 60 [2021-11-07 01:47:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:44,889 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 2006 transitions. [2021-11-07 01:47:44,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2006 transitions. [2021-11-07 01:47:44,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:47:44,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:44,892 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:44,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:45,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:45,107 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:45,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:45,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1032744871, now seen corresponding path program 1 times [2021-11-07 01:47:45,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:45,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390301298] [2021-11-07 01:47:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:45,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:45,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:45,110 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:45,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:47:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:45,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:47:45,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:45,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:45,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:45,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390301298] [2021-11-07 01:47:45,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390301298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:45,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:45,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:47:45,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80477605] [2021-11-07 01:47:45,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:47:45,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:45,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:47:45,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:47:45,989 INFO L87 Difference]: Start difference. First operand 1125 states and 2006 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:46,137 INFO L93 Difference]: Finished difference Result 2141 states and 3806 transitions. [2021-11-07 01:47:46,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:47:46,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:47:46,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:46,145 INFO L225 Difference]: With dead ends: 2141 [2021-11-07 01:47:46,145 INFO L226 Difference]: Without dead ends: 1262 [2021-11-07 01:47:46,147 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 01:47:46,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-11-07 01:47:46,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1125. [2021-11-07 01:47:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1123 states have (on average 1.7845057880676758) internal successors, (2004), 1124 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2004 transitions. [2021-11-07 01:47:46,242 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2004 transitions. Word has length 61 [2021-11-07 01:47:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:46,243 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 2004 transitions. [2021-11-07 01:47:46,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:46,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2004 transitions. [2021-11-07 01:47:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:47:46,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:46,246 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 01:47:46,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:46,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:46,463 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:46,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:46,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1145119608, now seen corresponding path program 1 times [2021-11-07 01:47:46,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:46,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875169850] [2021-11-07 01:47:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:46,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:46,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:46,465 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:46,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:47:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:47,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:47:47,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:47,185 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 01:47:47,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:47,372 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 01:47:47,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:47,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875169850] [2021-11-07 01:47:47,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875169850] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:47,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:47,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:47:47,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298310768] [2021-11-07 01:47:47,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:47:47,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:47,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:47:47,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:47:47,375 INFO L87 Difference]: Start difference. First operand 1125 states and 2004 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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 01:47:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:47,530 INFO L93 Difference]: Finished difference Result 3015 states and 5401 transitions. [2021-11-07 01:47:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:47:47,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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 61 [2021-11-07 01:47:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:47,545 INFO L225 Difference]: With dead ends: 3015 [2021-11-07 01:47:47,545 INFO L226 Difference]: Without dead ends: 1986 [2021-11-07 01:47:47,550 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 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 01:47:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-11-07 01:47:47,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1849. [2021-11-07 01:47:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1847 states have (on average 1.7991337303735788) internal successors, (3323), 1848 states have internal predecessors, (3323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 3323 transitions. [2021-11-07 01:47:47,712 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 3323 transitions. Word has length 61 [2021-11-07 01:47:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:47,713 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 3323 transitions. [2021-11-07 01:47:47,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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 01:47:47,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 3323 transitions. [2021-11-07 01:47:47,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:47:47,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:47,717 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:47,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:47,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:47,935 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:47,936 INFO L85 PathProgramCache]: Analyzing trace with hash 293438315, now seen corresponding path program 1 times [2021-11-07 01:47:47,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:47,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759705740] [2021-11-07 01:47:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:47,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:47,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:47,938 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:47,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:47:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:48,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:47:48,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:48,644 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 01:47:48,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:48,822 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 01:47:48,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:48,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759705740] [2021-11-07 01:47:48,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759705740] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:48,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:48,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:47:48,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737531117] [2021-11-07 01:47:48,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:47:48,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:48,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:47:48,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:47:48,824 INFO L87 Difference]: Start difference. First operand 1849 states and 3323 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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 01:47:49,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:49,120 INFO L93 Difference]: Finished difference Result 4923 states and 8877 transitions. [2021-11-07 01:47:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:47:49,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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 62 [2021-11-07 01:47:49,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:49,148 INFO L225 Difference]: With dead ends: 4923 [2021-11-07 01:47:49,148 INFO L226 Difference]: Without dead ends: 3204 [2021-11-07 01:47:49,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 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 01:47:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-11-07 01:47:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3067. [2021-11-07 01:47:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3067 states, 3065 states have (on average 1.806199021207178) internal successors, (5536), 3066 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 5536 transitions. [2021-11-07 01:47:49,459 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 5536 transitions. Word has length 62 [2021-11-07 01:47:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:49,459 INFO L470 AbstractCegarLoop]: Abstraction has 3067 states and 5536 transitions. [2021-11-07 01:47:49,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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 01:47:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 5536 transitions. [2021-11-07 01:47:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:47:49,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:49,464 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:49,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:49,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:49,685 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:49,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:49,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1457306487, now seen corresponding path program 1 times [2021-11-07 01:47:49,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:49,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892517158] [2021-11-07 01:47:49,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:49,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:49,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:49,688 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:49,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:47:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:50,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:47:50,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:50,402 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 01:47:50,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:50,539 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 01:47:50,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:50,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892517158] [2021-11-07 01:47:50,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892517158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:50,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:50,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:47:50,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225649789] [2021-11-07 01:47:50,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:47:50,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:50,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:47:50,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:47:50,541 INFO L87 Difference]: Start difference. First operand 3067 states and 5536 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:50,933 INFO L93 Difference]: Finished difference Result 8293 states and 14999 transitions. [2021-11-07 01:47:50,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:47:50,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:47:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:50,967 INFO L225 Difference]: With dead ends: 8293 [2021-11-07 01:47:50,968 INFO L226 Difference]: Without dead ends: 5390 [2021-11-07 01:47:50,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 01:47:50,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2021-11-07 01:47:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 5253. [2021-11-07 01:47:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5253 states, 5251 states have (on average 1.808607884212531) internal successors, (9497), 5252 states have internal predecessors, (9497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5253 states to 5253 states and 9497 transitions. [2021-11-07 01:47:51,437 INFO L78 Accepts]: Start accepts. Automaton has 5253 states and 9497 transitions. Word has length 63 [2021-11-07 01:47:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:51,438 INFO L470 AbstractCegarLoop]: Abstraction has 5253 states and 9497 transitions. [2021-11-07 01:47:51,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 5253 states and 9497 transitions. [2021-11-07 01:47:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:47:51,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:51,443 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] [2021-11-07 01:47:51,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:47:51,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:51,660 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:51,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1721005997, now seen corresponding path program 1 times [2021-11-07 01:47:51,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:51,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796179355] [2021-11-07 01:47:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:51,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:51,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:51,663 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:51,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:47:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:52,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:47:52,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:52,438 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 01:47:52,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:52,695 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 01:47:52,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:52,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796179355] [2021-11-07 01:47:52,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796179355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:52,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:52,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:47:52,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038959526] [2021-11-07 01:47:52,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:47:52,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:52,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:47:52,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:47:52,698 INFO L87 Difference]: Start difference. First operand 5253 states and 9497 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:55,812 INFO L93 Difference]: Finished difference Result 19652 states and 35569 transitions. [2021-11-07 01:47:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:47:55,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:47:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:55,884 INFO L225 Difference]: With dead ends: 19652 [2021-11-07 01:47:55,884 INFO L226 Difference]: Without dead ends: 14643 [2021-11-07 01:47:55,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 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 01:47:55,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14643 states. [2021-11-07 01:47:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14643 to 5203. [2021-11-07 01:47:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5203 states, 5201 states have (on average 1.7875408575273986) internal successors, (9297), 5202 states have internal predecessors, (9297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5203 states to 5203 states and 9297 transitions. [2021-11-07 01:47:56,518 INFO L78 Accepts]: Start accepts. Automaton has 5203 states and 9297 transitions. Word has length 64 [2021-11-07 01:47:56,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:56,518 INFO L470 AbstractCegarLoop]: Abstraction has 5203 states and 9297 transitions. [2021-11-07 01:47:56,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:56,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5203 states and 9297 transitions. [2021-11-07 01:47:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:47:56,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:56,524 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:56,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:56,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:56,741 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1138466148, now seen corresponding path program 1 times [2021-11-07 01:47:56,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:56,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257887511] [2021-11-07 01:47:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:56,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:56,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:56,744 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:56,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:47:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:57,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:47:57,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:57,743 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 01:47:57,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:57,920 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 01:47:57,920 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:57,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257887511] [2021-11-07 01:47:57,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257887511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:57,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:57,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:47:57,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318262084] [2021-11-07 01:47:57,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:47:57,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:47:57,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:47:57,922 INFO L87 Difference]: Start difference. First operand 5203 states and 9297 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:58,545 INFO L93 Difference]: Finished difference Result 15030 states and 26905 transitions. [2021-11-07 01:47:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:47:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:47:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:58,575 INFO L225 Difference]: With dead ends: 15030 [2021-11-07 01:47:58,575 INFO L226 Difference]: Without dead ends: 9998 [2021-11-07 01:47:58,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:47:58,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9998 states. [2021-11-07 01:47:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9998 to 9861. [2021-11-07 01:47:59,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9861 states, 9859 states have (on average 1.7886195354498429) internal successors, (17634), 9860 states have internal predecessors, (17634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9861 states to 9861 states and 17634 transitions. [2021-11-07 01:47:59,318 INFO L78 Accepts]: Start accepts. Automaton has 9861 states and 17634 transitions. Word has length 64 [2021-11-07 01:47:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:59,318 INFO L470 AbstractCegarLoop]: Abstraction has 9861 states and 17634 transitions. [2021-11-07 01:47:59,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 9861 states and 17634 transitions. [2021-11-07 01:47:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:47:59,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:59,325 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] [2021-11-07 01:47:59,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:59,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:59,528 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:59,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:59,528 INFO L85 PathProgramCache]: Analyzing trace with hash -576972376, now seen corresponding path program 1 times [2021-11-07 01:47:59,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:59,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667790494] [2021-11-07 01:47:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:59,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:59,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:59,530 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:59,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:48:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:00,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:00,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:00,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:00,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:00,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667790494] [2021-11-07 01:48:00,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667790494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:00,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [781996554] [2021-11-07 01:48:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:00,578 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:00,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:48:00,585 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:48:00,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:48:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:01,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:48:01,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:01,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:02,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [781996554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:02,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:48:02,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:48:02,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509754873] [2021-11-07 01:48:02,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:48:02,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:02,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:48:02,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:48:02,041 INFO L87 Difference]: Start difference. First operand 9861 states and 17634 transitions. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:08,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:08,229 INFO L93 Difference]: Finished difference Result 58402 states and 104844 transitions. [2021-11-07 01:48:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:48:08,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:48:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:08,401 INFO L225 Difference]: With dead ends: 58402 [2021-11-07 01:48:08,401 INFO L226 Difference]: Without dead ends: 58283 [2021-11-07 01:48:08,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:48:08,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58283 states. [2021-11-07 01:48:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58283 to 19684. [2021-11-07 01:48:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19684 states, 19682 states have (on average 1.7889442129864852) internal successors, (35210), 19683 states have internal predecessors, (35210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19684 states to 19684 states and 35210 transitions. [2021-11-07 01:48:10,177 INFO L78 Accepts]: Start accepts. Automaton has 19684 states and 35210 transitions. Word has length 65 [2021-11-07 01:48:10,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:10,178 INFO L470 AbstractCegarLoop]: Abstraction has 19684 states and 35210 transitions. [2021-11-07 01:48:10,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 19684 states and 35210 transitions. [2021-11-07 01:48:10,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:48:10,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:10,188 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] [2021-11-07 01:48:10,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:10,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:48:10,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:10,593 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash -910634639, now seen corresponding path program 1 times [2021-11-07 01:48:10,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:10,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911343530] [2021-11-07 01:48:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:10,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:10,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:10,596 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:10,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:48:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:11,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:11,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:11,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:11,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:11,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911343530] [2021-11-07 01:48:11,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911343530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:11,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [669770742] [2021-11-07 01:48:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:11,703 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:11,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:48:11,709 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:48:11,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:48:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:12,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:48:12,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:12,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:13,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [669770742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:13,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:48:13,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:48:13,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578200818] [2021-11-07 01:48:13,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:48:13,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:13,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:48:13,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:48:13,173 INFO L87 Difference]: Start difference. First operand 19684 states and 35210 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:16,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:16,551 INFO L93 Difference]: Finished difference Result 20077 states and 35837 transitions. [2021-11-07 01:48:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:48:16,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:48:16,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:16,603 INFO L225 Difference]: With dead ends: 20077 [2021-11-07 01:48:16,604 INFO L226 Difference]: Without dead ends: 19849 [2021-11-07 01:48:16,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:48:16,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19849 states. [2021-11-07 01:48:18,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19849 to 19678. [2021-11-07 01:48:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19678 states, 19676 states have (on average 1.7888290302907095) internal successors, (35197), 19677 states have internal predecessors, (35197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19678 states to 19678 states and 35197 transitions. [2021-11-07 01:48:18,377 INFO L78 Accepts]: Start accepts. Automaton has 19678 states and 35197 transitions. Word has length 66 [2021-11-07 01:48:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:18,378 INFO L470 AbstractCegarLoop]: Abstraction has 19678 states and 35197 transitions. [2021-11-07 01:48:18,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 19678 states and 35197 transitions. [2021-11-07 01:48:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:48:18,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:18,390 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] [2021-11-07 01:48:18,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:18,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:18,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:18,796 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1384748261, now seen corresponding path program 1 times [2021-11-07 01:48:18,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:18,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376406814] [2021-11-07 01:48:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:18,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:18,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:18,799 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:18,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:48:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:19,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:48:19,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:19,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:19,890 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:19,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376406814] [2021-11-07 01:48:19,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376406814] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:19,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:19,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:48:19,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347537748] [2021-11-07 01:48:19,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:19,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:19,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:19,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:19,892 INFO L87 Difference]: Start difference. First operand 19678 states and 35197 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:20,973 INFO L93 Difference]: Finished difference Result 38422 states and 68947 transitions. [2021-11-07 01:48:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:20,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:48:20,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:21,019 INFO L225 Difference]: With dead ends: 38422 [2021-11-07 01:48:21,019 INFO L226 Difference]: Without dead ends: 18991 [2021-11-07 01:48:21,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:48:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18991 states. [2021-11-07 01:48:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18991 to 9859. [2021-11-07 01:48:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9859 states, 9857 states have (on average 1.7880693923100335) internal successors, (17625), 9858 states have internal predecessors, (17625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:22,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9859 states to 9859 states and 17625 transitions. [2021-11-07 01:48:22,186 INFO L78 Accepts]: Start accepts. Automaton has 9859 states and 17625 transitions. Word has length 66 [2021-11-07 01:48:22,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:22,187 INFO L470 AbstractCegarLoop]: Abstraction has 9859 states and 17625 transitions. [2021-11-07 01:48:22,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:22,187 INFO L276 IsEmpty]: Start isEmpty. Operand 9859 states and 17625 transitions. [2021-11-07 01:48:22,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:48:22,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:22,193 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] [2021-11-07 01:48:22,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:48:22,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:22,411 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:22,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1783013089, now seen corresponding path program 1 times [2021-11-07 01:48:22,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:22,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889611867] [2021-11-07 01:48:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:22,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:22,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:22,413 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:22,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:48:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:23,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:23,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:23,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:23,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:23,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889611867] [2021-11-07 01:48:23,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889611867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:23,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [108734095] [2021-11-07 01:48:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:23,597 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:23,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:48:23,601 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:48:23,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:48:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:24,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:48:24,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:24,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:25,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [108734095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:25,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:48:25,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [5, 5] total 17 [2021-11-07 01:48:25,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863944719] [2021-11-07 01:48:25,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:48:25,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:25,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:48:25,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:48:25,348 INFO L87 Difference]: Start difference. First operand 9859 states and 17625 transitions. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:30,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:30,991 INFO L93 Difference]: Finished difference Result 38455 states and 69156 transitions. [2021-11-07 01:48:30,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:48:30,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:48:30,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:31,064 INFO L225 Difference]: With dead ends: 38455 [2021-11-07 01:48:31,064 INFO L226 Difference]: Without dead ends: 38443 [2021-11-07 01:48:31,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:48:31,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38443 states. [2021-11-07 01:48:32,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38443 to 9861. [2021-11-07 01:48:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9861 states, 9859 states have (on average 1.7878080941271934) internal successors, (17626), 9860 states have internal predecessors, (17626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:32,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9861 states to 9861 states and 17626 transitions. [2021-11-07 01:48:32,615 INFO L78 Accepts]: Start accepts. Automaton has 9861 states and 17626 transitions. Word has length 68 [2021-11-07 01:48:32,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:32,615 INFO L470 AbstractCegarLoop]: Abstraction has 9861 states and 17626 transitions. [2021-11-07 01:48:32,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:32,615 INFO L276 IsEmpty]: Start isEmpty. Operand 9861 states and 17626 transitions. [2021-11-07 01:48:32,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:48:32,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:32,622 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] [2021-11-07 01:48:32,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:32,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:33,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:33,045 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash 562746388, now seen corresponding path program 1 times [2021-11-07 01:48:33,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:33,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52423297] [2021-11-07 01:48:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:33,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:33,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:33,047 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:33,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:48:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:33,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:33,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:33,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:34,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:34,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52423297] [2021-11-07 01:48:34,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52423297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:34,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1612573121] [2021-11-07 01:48:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:34,167 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:34,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:48:34,168 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:48:34,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:48:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:35,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:48:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:35,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:35,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1612573121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:35,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:48:35,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:48:35,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322392557] [2021-11-07 01:48:35,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:48:35,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:35,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:48:35,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:48:35,711 INFO L87 Difference]: Start difference. First operand 9861 states and 17626 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:38,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:38,560 INFO L93 Difference]: Finished difference Result 9980 states and 17815 transitions. [2021-11-07 01:48:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:48:38,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:48:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:38,637 INFO L225 Difference]: With dead ends: 9980 [2021-11-07 01:48:38,637 INFO L226 Difference]: Without dead ends: 9872 [2021-11-07 01:48:38,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:48:38,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9872 states. [2021-11-07 01:48:39,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9872 to 9855. [2021-11-07 01:48:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9855 states, 9854 states have (on average 1.7878019078546783) internal successors, (17617), 9854 states have internal predecessors, (17617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9855 states to 9855 states and 17617 transitions. [2021-11-07 01:48:39,236 INFO L78 Accepts]: Start accepts. Automaton has 9855 states and 17617 transitions. Word has length 69 [2021-11-07 01:48:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:39,236 INFO L470 AbstractCegarLoop]: Abstraction has 9855 states and 17617 transitions. [2021-11-07 01:48:39,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 9855 states and 17617 transitions. [2021-11-07 01:48:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:48:39,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:39,256 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:39,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:39,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:39,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:39,660 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:39,660 INFO L85 PathProgramCache]: Analyzing trace with hash 536831335, now seen corresponding path program 1 times [2021-11-07 01:48:39,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:39,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561074737] [2021-11-07 01:48:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:39,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:39,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:39,662 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:39,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:48:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:40,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:40,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:40,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:41,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:41,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561074737] [2021-11-07 01:48:41,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561074737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:41,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [220947762] [2021-11-07 01:48:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:41,117 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:41,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:48:41,118 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:48:41,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:48:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:42,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:48:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:42,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:42,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [220947762] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:42,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:48:42,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [5, 5] total 17 [2021-11-07 01:48:42,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063680389] [2021-11-07 01:48:42,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:48:42,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:42,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:48:42,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:48:42,822 INFO L87 Difference]: Start difference. First operand 9855 states and 17617 transitions. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:46,028 INFO L93 Difference]: Finished difference Result 10607 states and 18814 transitions. [2021-11-07 01:48:46,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:48:46,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 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 96 [2021-11-07 01:48:46,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:46,043 INFO L225 Difference]: With dead ends: 10607 [2021-11-07 01:48:46,044 INFO L226 Difference]: Without dead ends: 10505 [2021-11-07 01:48:46,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:48:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10505 states. [2021-11-07 01:48:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10505 to 9869. [2021-11-07 01:48:46,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9869 states, 9868 states have (on average 1.7874949331171464) internal successors, (17639), 9868 states have internal predecessors, (17639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9869 states to 9869 states and 17639 transitions. [2021-11-07 01:48:46,710 INFO L78 Accepts]: Start accepts. Automaton has 9869 states and 17639 transitions. Word has length 96 [2021-11-07 01:48:46,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:46,710 INFO L470 AbstractCegarLoop]: Abstraction has 9869 states and 17639 transitions. [2021-11-07 01:48:46,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:46,710 INFO L276 IsEmpty]: Start isEmpty. Operand 9869 states and 17639 transitions. [2021-11-07 01:48:46,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 01:48:46,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:46,723 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:46,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:46,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-07 01:48:47,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:47,124 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash 70690744, now seen corresponding path program 1 times [2021-11-07 01:48:47,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:47,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276548550] [2021-11-07 01:48:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:47,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:47,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:47,126 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:47,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:48:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:48,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:48,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:48,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:48,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:48,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276548550] [2021-11-07 01:48:48,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276548550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:48,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [334998936] [2021-11-07 01:48:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:48,617 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:48,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:48:48,617 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:48:48,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:48:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:49,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:48:49,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:50,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:50,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [334998936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:50,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:48:50,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 01:48:50,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72507496] [2021-11-07 01:48:50,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:48:50,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:48:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:48:50,460 INFO L87 Difference]: Start difference. First operand 9869 states and 17639 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:51,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:51,177 INFO L93 Difference]: Finished difference Result 9999 states and 17840 transitions. [2021-11-07 01:48:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:51,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 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 97 [2021-11-07 01:48:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:51,194 INFO L225 Difference]: With dead ends: 9999 [2021-11-07 01:48:51,194 INFO L226 Difference]: Without dead ends: 9878 [2021-11-07 01:48:51,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:48:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9878 states. [2021-11-07 01:48:52,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9878 to 9856. [2021-11-07 01:48:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9856 states, 9855 states have (on average 1.7875190258751903) internal successors, (17616), 9855 states have internal predecessors, (17616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9856 states to 9856 states and 17616 transitions. [2021-11-07 01:48:52,035 INFO L78 Accepts]: Start accepts. Automaton has 9856 states and 17616 transitions. Word has length 97 [2021-11-07 01:48:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:52,035 INFO L470 AbstractCegarLoop]: Abstraction has 9856 states and 17616 transitions. [2021-11-07 01:48:52,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 9856 states and 17616 transitions. [2021-11-07 01:48:52,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 01:48:52,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:52,049 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:52,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:52,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:52,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:52,450 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:52,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1293664473, now seen corresponding path program 1 times [2021-11-07 01:48:52,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:52,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108720314] [2021-11-07 01:48:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:52,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:52,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:52,453 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:52,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:48:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:53,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:53,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:53,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:54,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:54,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108720314] [2021-11-07 01:48:54,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108720314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:54,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1133408677] [2021-11-07 01:48:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:54,035 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:48:54,036 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:48:54,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:48:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:55,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:48:55,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:55,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:55,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1133408677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:55,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:48:55,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-07 01:48:55,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221737195] [2021-11-07 01:48:55,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:48:55,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:55,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:48:55,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:48:55,910 INFO L87 Difference]: Start difference. First operand 9856 states and 17616 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:56,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:56,671 INFO L93 Difference]: Finished difference Result 10051 states and 17920 transitions. [2021-11-07 01:48:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:48:56,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 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 97 [2021-11-07 01:48:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:56,687 INFO L225 Difference]: With dead ends: 10051 [2021-11-07 01:48:56,687 INFO L226 Difference]: Without dead ends: 9943 [2021-11-07 01:48:56,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:48:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9943 states. [2021-11-07 01:48:57,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9943 to 9853. [2021-11-07 01:48:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9853 states, 9852 states have (on average 1.787454323995128) internal successors, (17610), 9852 states have internal predecessors, (17610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9853 states to 9853 states and 17610 transitions. [2021-11-07 01:48:57,250 INFO L78 Accepts]: Start accepts. Automaton has 9853 states and 17610 transitions. Word has length 97 [2021-11-07 01:48:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:57,250 INFO L470 AbstractCegarLoop]: Abstraction has 9853 states and 17610 transitions. [2021-11-07 01:48:57,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 9853 states and 17610 transitions. [2021-11-07 01:48:57,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 01:48:57,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:57,263 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:57,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:57,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-07 01:48:57,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:57,664 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:57,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:57,665 INFO L85 PathProgramCache]: Analyzing trace with hash 374357547, now seen corresponding path program 1 times [2021-11-07 01:48:57,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:57,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693525091] [2021-11-07 01:48:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:57,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:57,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:57,666 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:57,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:48:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:58,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:58,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:59,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:59,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:59,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693525091] [2021-11-07 01:48:59,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693525091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:59,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1065197861] [2021-11-07 01:48:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:59,389 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:59,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:48:59,397 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:48:59,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:49:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:00,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:49:00,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:01,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:01,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1065197861] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:01,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:49:01,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5, 5] total 13 [2021-11-07 01:49:01,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218348597] [2021-11-07 01:49:01,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:49:01,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:01,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:49:01,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:49:01,334 INFO L87 Difference]: Start difference. First operand 9853 states and 17610 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:01,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:01,898 INFO L93 Difference]: Finished difference Result 9921 states and 17712 transitions. [2021-11-07 01:49:01,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:49:01,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 99 [2021-11-07 01:49:01,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:01,914 INFO L225 Difference]: With dead ends: 9921 [2021-11-07 01:49:01,914 INFO L226 Difference]: Without dead ends: 9853 [2021-11-07 01:49:01,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:49:01,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9853 states. [2021-11-07 01:49:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9853 to 9853. [2021-11-07 01:49:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9853 states, 9852 states have (on average 1.7873528217620787) internal successors, (17609), 9852 states have internal predecessors, (17609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:02,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9853 states to 9853 states and 17609 transitions. [2021-11-07 01:49:02,528 INFO L78 Accepts]: Start accepts. Automaton has 9853 states and 17609 transitions. Word has length 99 [2021-11-07 01:49:02,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:02,528 INFO L470 AbstractCegarLoop]: Abstraction has 9853 states and 17609 transitions. [2021-11-07 01:49:02,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:02,528 INFO L276 IsEmpty]: Start isEmpty. Operand 9853 states and 17609 transitions. [2021-11-07 01:49:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 01:49:02,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:02,542 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:02,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:02,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-07 01:49:02,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:02,943 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:02,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:02,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1302771953, now seen corresponding path program 1 times [2021-11-07 01:49:02,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:02,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857100154] [2021-11-07 01:49:02,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:02,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:02,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:02,945 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:02,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:49:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:04,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:04,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:04,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:04,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:04,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857100154] [2021-11-07 01:49:04,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857100154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:49:04,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [553583675] [2021-11-07 01:49:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:04,701 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:04,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:49:04,702 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:49:04,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 01:49:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:06,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:49:06,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:06,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:07,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [553583675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:07,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:49:07,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [5, 5] total 17 [2021-11-07 01:49:07,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163146131] [2021-11-07 01:49:07,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:49:07,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:49:07,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:49:07,023 INFO L87 Difference]: Start difference. First operand 9853 states and 17609 transitions. Second operand has 11 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:10,086 INFO L93 Difference]: Finished difference Result 10212 states and 18144 transitions. [2021-11-07 01:49:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:49:10,094 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 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 102 [2021-11-07 01:49:10,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:10,109 INFO L225 Difference]: With dead ends: 10212 [2021-11-07 01:49:10,110 INFO L226 Difference]: Without dead ends: 10144 [2021-11-07 01:49:10,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:49:10,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10144 states. [2021-11-07 01:49:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10144 to 9855. [2021-11-07 01:49:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9855 states, 9854 states have (on average 1.7871930180637305) internal successors, (17611), 9854 states have internal predecessors, (17611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9855 states to 9855 states and 17611 transitions. [2021-11-07 01:49:10,731 INFO L78 Accepts]: Start accepts. Automaton has 9855 states and 17611 transitions. Word has length 102 [2021-11-07 01:49:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:10,731 INFO L470 AbstractCegarLoop]: Abstraction has 9855 states and 17611 transitions. [2021-11-07 01:49:10,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 9855 states and 17611 transitions. [2021-11-07 01:49:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:49:10,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:10,742 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:10,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:10,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:11,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:11,150 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash 925246167, now seen corresponding path program 1 times [2021-11-07 01:49:11,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:11,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877495517] [2021-11-07 01:49:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:11,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:11,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:11,152 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:11,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:49:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:12,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:12,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:12,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:13,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:13,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877495517] [2021-11-07 01:49:13,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877495517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:49:13,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [783425564] [2021-11-07 01:49:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:13,013 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:13,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:49:13,019 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:49:13,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 01:49:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:14,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:49:14,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:15,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:15,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [783425564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:15,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:49:15,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 15 [2021-11-07 01:49:15,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805851733] [2021-11-07 01:49:15,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:49:15,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:15,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:49:15,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:49:15,501 INFO L87 Difference]: Start difference. First operand 9855 states and 17611 transitions. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:16,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:16,626 INFO L93 Difference]: Finished difference Result 9990 states and 17817 transitions. [2021-11-07 01:49:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:49:16,626 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 01:49:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:16,647 INFO L225 Difference]: With dead ends: 9990 [2021-11-07 01:49:16,648 INFO L226 Difference]: Without dead ends: 9895 [2021-11-07 01:49:16,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:49:16,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9895 states. [2021-11-07 01:49:17,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9895 to 9852. [2021-11-07 01:49:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9852 states, 9851 states have (on average 1.7871282103339763) internal successors, (17605), 9851 states have internal predecessors, (17605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9852 states to 9852 states and 17605 transitions. [2021-11-07 01:49:17,256 INFO L78 Accepts]: Start accepts. Automaton has 9852 states and 17605 transitions. Word has length 103 [2021-11-07 01:49:17,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:17,257 INFO L470 AbstractCegarLoop]: Abstraction has 9852 states and 17605 transitions. [2021-11-07 01:49:17,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 9852 states and 17605 transitions. [2021-11-07 01:49:17,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 01:49:17,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:17,267 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:17,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:17,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-07 01:49:17,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:17,668 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:17,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1349180212, now seen corresponding path program 1 times [2021-11-07 01:49:17,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:17,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072824358] [2021-11-07 01:49:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:17,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:17,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:17,671 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:17,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 01:49:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:19,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:19,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:19,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:19,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:19,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072824358] [2021-11-07 01:49:19,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072824358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:49:19,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1779985729] [2021-11-07 01:49:19,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:19,762 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:19,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:49:19,763 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:49:19,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-07 01:49:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:21,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:49:21,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:22,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:23,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1779985729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:23,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:49:23,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:49:23,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354840059] [2021-11-07 01:49:23,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:49:23,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:23,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:49:23,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:49:23,316 INFO L87 Difference]: Start difference. First operand 9852 states and 17605 transitions. Second operand has 18 states, 18 states have (on average 9.833333333333334) internal successors, (177), 17 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:45,172 INFO L93 Difference]: Finished difference Result 30465 states and 54147 transitions. [2021-11-07 01:49:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 01:49:45,172 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.833333333333334) internal successors, (177), 17 states have internal predecessors, (177), 0 states have call successors, (0), 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 109 [2021-11-07 01:49:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:45,230 INFO L225 Difference]: With dead ends: 30465 [2021-11-07 01:49:45,230 INFO L226 Difference]: Without dead ends: 30386 [2021-11-07 01:49:45,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=710, Invalid=2482, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 01:49:45,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30386 states. [2021-11-07 01:49:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30386 to 19606. [2021-11-07 01:49:46,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19606 states, 19605 states have (on average 1.7881152767151236) internal successors, (35056), 19605 states have internal predecessors, (35056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:46,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19606 states to 19606 states and 35056 transitions. [2021-11-07 01:49:46,794 INFO L78 Accepts]: Start accepts. Automaton has 19606 states and 35056 transitions. Word has length 109 [2021-11-07 01:49:46,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:46,794 INFO L470 AbstractCegarLoop]: Abstraction has 19606 states and 35056 transitions. [2021-11-07 01:49:46,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.833333333333334) internal successors, (177), 17 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:46,795 INFO L276 IsEmpty]: Start isEmpty. Operand 19606 states and 35056 transitions. [2021-11-07 01:49:46,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 01:49:46,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:46,819 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:46,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:47,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:47,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:47,233 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:47,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1611303235, now seen corresponding path program 1 times [2021-11-07 01:49:47,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:47,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645410386] [2021-11-07 01:49:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:47,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:47,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:47,236 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:47,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-07 01:49:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:48,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:48,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:49,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:49,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:49,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645410386] [2021-11-07 01:49:49,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645410386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:49:49,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [959442139] [2021-11-07 01:49:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:49,478 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:49,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:49:49,479 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:49:49,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-07 01:49:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:51,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:49:51,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:52,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:49:52,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [959442139] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:52,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:49:52,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 15 [2021-11-07 01:49:52,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101835585] [2021-11-07 01:49:52,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:49:52,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:52,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:49:52,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:49:52,378 INFO L87 Difference]: Start difference. First operand 19606 states and 35056 transitions. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:58,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:58,227 INFO L93 Difference]: Finished difference Result 20499 states and 36374 transitions. [2021-11-07 01:49:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 01:49:58,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 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 110 [2021-11-07 01:49:58,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:58,259 INFO L225 Difference]: With dead ends: 20499 [2021-11-07 01:49:58,259 INFO L226 Difference]: Without dead ends: 20414 [2021-11-07 01:49:58,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:49:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20414 states. [2021-11-07 01:49:59,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20414 to 19665. [2021-11-07 01:49:59,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19665 states, 19664 states have (on average 1.786513425549227) internal successors, (35130), 19664 states have internal predecessors, (35130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19665 states to 19665 states and 35130 transitions. [2021-11-07 01:49:59,622 INFO L78 Accepts]: Start accepts. Automaton has 19665 states and 35130 transitions. Word has length 110 [2021-11-07 01:49:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:59,623 INFO L470 AbstractCegarLoop]: Abstraction has 19665 states and 35130 transitions. [2021-11-07 01:49:59,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 19665 states and 35130 transitions. [2021-11-07 01:49:59,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 01:49:59,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:59,649 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:59,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:59,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:00,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:00,061 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:00,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1425084239, now seen corresponding path program 1 times [2021-11-07 01:50:00,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:00,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786715820] [2021-11-07 01:50:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:00,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:00,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:00,063 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:00,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-07 01:50:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:01,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:50:01,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:01,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:02,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:02,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786715820] [2021-11-07 01:50:02,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786715820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:02,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1159369589] [2021-11-07 01:50:02,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:02,203 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:02,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:50:02,204 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:50:02,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-07 01:50:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:04,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:50:04,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:50:05,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:50:05,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1159369589] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:05,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:50:05,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:50:05,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891997990] [2021-11-07 01:50:05,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:50:05,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:05,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:50:05,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:50:05,708 INFO L87 Difference]: Start difference. First operand 19665 states and 35130 transitions. Second operand has 18 states, 18 states have (on average 9.944444444444445) internal successors, (179), 17 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:28,745 INFO L93 Difference]: Finished difference Result 49860 states and 88780 transitions. [2021-11-07 01:50:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 01:50:28,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.944444444444445) internal successors, (179), 17 states have internal predecessors, (179), 0 states have call successors, (0), 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 110 [2021-11-07 01:50:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:28,829 INFO L225 Difference]: With dead ends: 49860 [2021-11-07 01:50:28,829 INFO L226 Difference]: Without dead ends: 49781 [2021-11-07 01:50:28,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=710, Invalid=2482, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 01:50:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49781 states. [2021-11-07 01:50:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49781 to 38912. [2021-11-07 01:50:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38912 states, 38911 states have (on average 1.788157590398602) internal successors, (69579), 38911 states have internal predecessors, (69579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38912 states to 38912 states and 69579 transitions. [2021-11-07 01:50:31,577 INFO L78 Accepts]: Start accepts. Automaton has 38912 states and 69579 transitions. Word has length 110 [2021-11-07 01:50:31,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:31,577 INFO L470 AbstractCegarLoop]: Abstraction has 38912 states and 69579 transitions. [2021-11-07 01:50:31,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.944444444444445) internal successors, (179), 17 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 38912 states and 69579 transitions. [2021-11-07 01:50:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 01:50:31,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:31,664 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:31,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:31,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:32,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:32,075 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:32,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:32,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1321867343, now seen corresponding path program 1 times [2021-11-07 01:50:32,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:32,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574437790] [2021-11-07 01:50:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:32,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:32,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:32,078 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:32,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-07 01:50:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:50:33,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:34,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:34,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:34,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574437790] [2021-11-07 01:50:34,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574437790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:34,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1533439323] [2021-11-07 01:50:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:34,361 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:34,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:50:34,369 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:50:34,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-07 01:50:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:36,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:50:36,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:50:37,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:50:38,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1533439323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:38,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:50:38,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:50:38,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746513826] [2021-11-07 01:50:38,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:50:38,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:38,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:50:38,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:50:38,228 INFO L87 Difference]: Start difference. First operand 38912 states and 69579 transitions. Second operand has 18 states, 18 states have (on average 10.055555555555555) internal successors, (181), 17 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:07,981 INFO L93 Difference]: Finished difference Result 88102 states and 157237 transitions. [2021-11-07 01:51:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 01:51:07,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.055555555555555) internal successors, (181), 17 states have internal predecessors, (181), 0 states have call successors, (0), 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 111 [2021-11-07 01:51:07,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:08,135 INFO L225 Difference]: With dead ends: 88102 [2021-11-07 01:51:08,135 INFO L226 Difference]: Without dead ends: 88023 [2021-11-07 01:51:08,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=710, Invalid=2482, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 01:51:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88023 states. [2021-11-07 01:51:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88023 to 77155. [2021-11-07 01:51:13,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77155 states, 77154 states have (on average 1.7891230525961064) internal successors, (138038), 77154 states have internal predecessors, (138038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:14,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77155 states to 77155 states and 138038 transitions. [2021-11-07 01:51:14,002 INFO L78 Accepts]: Start accepts. Automaton has 77155 states and 138038 transitions. Word has length 111 [2021-11-07 01:51:14,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:14,002 INFO L470 AbstractCegarLoop]: Abstraction has 77155 states and 138038 transitions. [2021-11-07 01:51:14,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.055555555555555) internal successors, (181), 17 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 77155 states and 138038 transitions. [2021-11-07 01:51:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 01:51:14,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:14,350 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:14,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-07 01:51:14,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:14,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:51:14,765 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:51:14,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:14,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1299235089, now seen corresponding path program 1 times [2021-11-07 01:51:14,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:14,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732164303] [2021-11-07 01:51:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:14,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:14,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:14,768 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:14,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-07 01:51:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:16,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:51:16,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:16,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:17,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:17,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732164303] [2021-11-07 01:51:17,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732164303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:51:17,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [464015245] [2021-11-07 01:51:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:17,116 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:51:17,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:51:17,121 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:51:17,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6118e278-7123-45e2-b7b2-2794f300d122/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-07 01:51:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:19,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:51:19,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:51:20,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:51:20,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [464015245] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:20,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:51:20,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 24 [2021-11-07 01:51:20,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617522339] [2021-11-07 01:51:20,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:51:20,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:20,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:51:20,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:51:20,758 INFO L87 Difference]: Start difference. First operand 77155 states and 138038 transitions. Second operand has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:34,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:34,446 INFO L93 Difference]: Finished difference Result 80117 states and 142333 transitions. [2021-11-07 01:51:34,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 01:51:34,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 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 111 [2021-11-07 01:51:34,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:34,606 INFO L225 Difference]: With dead ends: 80117 [2021-11-07 01:51:34,607 INFO L226 Difference]: Without dead ends: 80053 [2021-11-07 01:51:34,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1589, Invalid=5893, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 01:51:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80053 states. [2021-11-07 01:51:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80053 to 77287. [2021-11-07 01:51:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77287 states, 77286 states have (on average 1.7883963460393861) internal successors, (138218), 77286 states have internal predecessors, (138218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77287 states to 77287 states and 138218 transitions. [2021-11-07 01:51:41,427 INFO L78 Accepts]: Start accepts. Automaton has 77287 states and 138218 transitions. Word has length 111 [2021-11-07 01:51:41,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:41,427 INFO L470 AbstractCegarLoop]: Abstraction has 77287 states and 138218 transitions. [2021-11-07 01:51:41,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:41,428 INFO L276 IsEmpty]: Start isEmpty. Operand 77287 states and 138218 transitions.