./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product14.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_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/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_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/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_8b751bc5-72f1-4c9e-b709-2388b8d89491/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 b949d09d593112e13964b4b5b0eef0c6cd05359df7437e0305220f7a663828f7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:34:00,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:34:00,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:34:01,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:34:01,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:34:01,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:34:01,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:34:01,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:34:01,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:34:01,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:34:01,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:34:01,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:34:01,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:34:01,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:34:01,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:34:01,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:34:01,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:34:01,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:34:01,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:34:01,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:34:01,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:34:01,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:34:01,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:34:01,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:34:01,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:34:01,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:34:01,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:34:01,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:34:01,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:34:01,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:34:01,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:34:01,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:34:01,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:34:01,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:34:01,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:34:01,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:34:01,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:34:01,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:34:01,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:34:01,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:34:01,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:34:01,087 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:34:01,141 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:34:01,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:34:01,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:34:01,144 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:34:01,144 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:34:01,144 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:34:01,144 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:34:01,145 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:34:01,145 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:34:01,145 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:34:01,152 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:34:01,153 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:34:01,153 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:34:01,153 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:34:01,154 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:34:01,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:34:01,155 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:34:01,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:34:01,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:34:01,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:34:01,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:34:01,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:34:01,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:34:01,156 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:34:01,157 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:34:01,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:34:01,157 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:34:01,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:34:01,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:34:01,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:34:01,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:01,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:34:01,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:34:01,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:34:01,160 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:34:01,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:34:01,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:34:01,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:34:01,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:34:01,161 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_8b751bc5-72f1-4c9e-b709-2388b8d89491/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b949d09d593112e13964b4b5b0eef0c6cd05359df7437e0305220f7a663828f7 [2021-11-07 01:34:01,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:34:01,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:34:01,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:34:01,551 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:34:01,552 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:34:01,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product14.cil.c [2021-11-07 01:34:01,632 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/data/196d45dfc/e220a9647bdb4abd8111d26609ec9134/FLAG8637dcf1d [2021-11-07 01:34:02,311 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:34:02,312 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/sv-benchmarks/c/product-lines/email_spec9_product14.cil.c [2021-11-07 01:34:02,334 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/data/196d45dfc/e220a9647bdb4abd8111d26609ec9134/FLAG8637dcf1d [2021-11-07 01:34:02,585 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/data/196d45dfc/e220a9647bdb4abd8111d26609ec9134 [2021-11-07 01:34:02,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:34:02,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:34:02,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:02,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:34:02,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:34:02,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:02" (1/1) ... [2021-11-07 01:34:02,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6d1145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:02, skipping insertion in model container [2021-11-07 01:34:02,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:02" (1/1) ... [2021-11-07 01:34:02,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:34:02,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:34:03,045 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_8b751bc5-72f1-4c9e-b709-2388b8d89491/sv-benchmarks/c/product-lines/email_spec9_product14.cil.c[8145,8158] [2021-11-07 01:34:03,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:03,356 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 01:34:03,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d37227c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:03, skipping insertion in model container [2021-11-07 01:34:03,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:03,357 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:34:03,360 INFO L168 Benchmark]: Toolchain (without parser) took 768.89 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 53.7 MB in the beginning and 76.0 MB in the end (delta: -22.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:03,361 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory was 64.8 MB in the beginning and 64.8 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:34:03,362 INFO L168 Benchmark]: CACSL2BoogieTranslator took 766.09 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 53.5 MB in the beginning and 76.0 MB in the end (delta: -22.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:03,363 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory was 64.8 MB in the beginning and 64.8 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 766.09 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 53.5 MB in the beginning and 76.0 MB in the end (delta: -22.6 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: 1004]: 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_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/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_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/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_8b751bc5-72f1-4c9e-b709-2388b8d89491/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 b949d09d593112e13964b4b5b0eef0c6cd05359df7437e0305220f7a663828f7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:34:05,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:34:05,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:34:05,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:34:05,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:34:05,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:34:05,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:34:05,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:34:05,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:34:05,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:34:05,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:34:05,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:34:05,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:34:05,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:34:05,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:34:05,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:34:05,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:34:05,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:34:05,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:34:05,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:34:05,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:34:05,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:34:05,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:34:05,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:34:05,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:34:05,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:34:05,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:34:05,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:34:05,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:34:05,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:34:05,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:34:05,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:34:05,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:34:05,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:34:05,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:34:05,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:34:05,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:34:05,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:34:05,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:34:05,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:34:05,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:34:05,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:34:05,917 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:34:05,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:34:05,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:34:05,919 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:34:05,919 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:34:05,919 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:34:05,920 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:34:05,920 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:34:05,920 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:34:05,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:34:05,926 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:34:05,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:34:05,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:34:05,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:34:05,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:34:05,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:34:05,928 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:34:05,928 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:34:05,928 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:34:05,928 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:34:05,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:34:05,929 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:34:05,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:34:05,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:34:05,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:34:05,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:34:05,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:05,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:34:05,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:34:05,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:34:05,931 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:34:05,931 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:05,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:34:05,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:34:05,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:34:05,932 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_8b751bc5-72f1-4c9e-b709-2388b8d89491/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b949d09d593112e13964b4b5b0eef0c6cd05359df7437e0305220f7a663828f7 [2021-11-07 01:34:06,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:34:06,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:34:06,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:34:06,364 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:34:06,367 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:34:06,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product14.cil.c [2021-11-07 01:34:06,444 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/data/bf6170285/991be9fca4fc4760901cc21002869570/FLAG24116e943 [2021-11-07 01:34:07,213 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:34:07,214 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/sv-benchmarks/c/product-lines/email_spec9_product14.cil.c [2021-11-07 01:34:07,242 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/data/bf6170285/991be9fca4fc4760901cc21002869570/FLAG24116e943 [2021-11-07 01:34:07,414 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/data/bf6170285/991be9fca4fc4760901cc21002869570 [2021-11-07 01:34:07,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:34:07,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:34:07,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:07,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:34:07,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:34:07,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:07" (1/1) ... [2021-11-07 01:34:07,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a18e4fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:07, skipping insertion in model container [2021-11-07 01:34:07,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:07" (1/1) ... [2021-11-07 01:34:07,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:34:07,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:34:07,887 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_8b751bc5-72f1-4c9e-b709-2388b8d89491/sv-benchmarks/c/product-lines/email_spec9_product14.cil.c[8145,8158] [2021-11-07 01:34:08,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:08,304 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:34:08,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:34:08,350 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_8b751bc5-72f1-4c9e-b709-2388b8d89491/sv-benchmarks/c/product-lines/email_spec9_product14.cil.c[8145,8158] [2021-11-07 01:34:08,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:08,462 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:34:08,504 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_8b751bc5-72f1-4c9e-b709-2388b8d89491/sv-benchmarks/c/product-lines/email_spec9_product14.cil.c[8145,8158] [2021-11-07 01:34:08,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:08,607 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:34:08,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:08 WrapperNode [2021-11-07 01:34:08,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:08,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:34:08,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:34:08,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:34:08,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:08" (1/1) ... [2021-11-07 01:34:08,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:08" (1/1) ... [2021-11-07 01:34:08,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:34:08,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:34:08,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:34:08,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:34:08,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:08" (1/1) ... [2021-11-07 01:34:08,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:08" (1/1) ... [2021-11-07 01:34:08,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:08" (1/1) ... [2021-11-07 01:34:08,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:08" (1/1) ... [2021-11-07 01:34:08,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:08" (1/1) ... [2021-11-07 01:34:08,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:08" (1/1) ... [2021-11-07 01:34:08,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:08" (1/1) ... [2021-11-07 01:34:09,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:34:09,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:34:09,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:34:09,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:34:09,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:08" (1/1) ... [2021-11-07 01:34:09,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:09,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:34:09,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:34:09,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:34:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:34:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:34:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:34:09,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:34:09,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:34:14,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:34:14,414 INFO L299 CfgBuilder]: Removed 465 assume(true) statements. [2021-11-07 01:34:14,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:34:14 BoogieIcfgContainer [2021-11-07 01:34:14,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:34:14,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:34:14,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:34:14,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:34:14,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:34:07" (1/3) ... [2021-11-07 01:34:14,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9ae525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:34:14, skipping insertion in model container [2021-11-07 01:34:14,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:08" (2/3) ... [2021-11-07 01:34:14,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9ae525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:34:14, skipping insertion in model container [2021-11-07 01:34:14,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:34:14" (3/3) ... [2021-11-07 01:34:14,447 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product14.cil.c [2021-11-07 01:34:14,452 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:34:14,465 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:34:14,559 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:34:14,566 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 01:34:14,566 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:34:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 766 states, 759 states have (on average 1.769433465085639) internal successors, (1343), 765 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:14,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:34:14,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:14,614 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 01:34:14,615 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:14,624 INFO L85 PathProgramCache]: Analyzing trace with hash 70871394, now seen corresponding path program 1 times [2021-11-07 01:34:14,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:14,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805972727] [2021-11-07 01:34:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:14,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:14,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:14,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:14,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:34:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:15,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:34:15,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:15,213 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 01:34:15,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:15,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:15,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805972727] [2021-11-07 01:34:15,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805972727] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:15,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:15,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:34:15,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568884632] [2021-11-07 01:34:15,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:34:15,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:15,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:34:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:34:15,369 INFO L87 Difference]: Start difference. First operand has 766 states, 759 states have (on average 1.769433465085639) internal successors, (1343), 765 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:15,433 INFO L93 Difference]: Finished difference Result 1251 states and 2170 transitions. [2021-11-07 01:34:15,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:34:15,435 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 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 01:34:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:15,455 INFO L225 Difference]: With dead ends: 1251 [2021-11-07 01:34:15,455 INFO L226 Difference]: Without dead ends: 702 [2021-11-07 01:34:15,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 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 01:34:15,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-11-07 01:34:15,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2021-11-07 01:34:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 696 states have (on average 1.7614942528735633) internal successors, (1226), 701 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1226 transitions. [2021-11-07 01:34:15,569 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1226 transitions. Word has length 44 [2021-11-07 01:34:15,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:15,570 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 1226 transitions. [2021-11-07 01:34:15,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1226 transitions. [2021-11-07 01:34:15,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:34:15,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:15,575 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 01:34:15,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:34:15,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:15,782 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:15,783 INFO L85 PathProgramCache]: Analyzing trace with hash -758967793, now seen corresponding path program 1 times [2021-11-07 01:34:15,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:15,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299380557] [2021-11-07 01:34:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:15,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:15,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:15,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:15,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:34:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:16,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:34:16,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:16,347 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 01:34:16,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:16,498 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 01:34:16,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:16,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299380557] [2021-11-07 01:34:16,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299380557] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:16,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:16,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:34:16,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068845400] [2021-11-07 01:34:16,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:34:16,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:16,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:34:16,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:16,507 INFO L87 Difference]: Start difference. First operand 702 states and 1226 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 01:34:16,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:16,672 INFO L93 Difference]: Finished difference Result 2076 states and 3630 transitions. [2021-11-07 01:34:16,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:34:16,673 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 45 [2021-11-07 01:34:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:16,686 INFO L225 Difference]: With dead ends: 2076 [2021-11-07 01:34:16,686 INFO L226 Difference]: Without dead ends: 1389 [2021-11-07 01:34:16,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 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 01:34:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-11-07 01:34:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 701. [2021-11-07 01:34:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 695 states have (on average 1.7568345323741008) internal successors, (1221), 700 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1221 transitions. [2021-11-07 01:34:16,762 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1221 transitions. Word has length 45 [2021-11-07 01:34:16,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:16,763 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 1221 transitions. [2021-11-07 01:34:16,763 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 01:34:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1221 transitions. [2021-11-07 01:34:16,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:34:16,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:16,767 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 01:34:16,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:16,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:16,989 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:16,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:16,990 INFO L85 PathProgramCache]: Analyzing trace with hash 339957877, now seen corresponding path program 1 times [2021-11-07 01:34:16,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:16,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137379190] [2021-11-07 01:34:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:16,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:16,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:16,993 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:17,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:34:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:17,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:34:17,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:17,540 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 01:34:17,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:17,683 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 01:34:17,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:17,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137379190] [2021-11-07 01:34:17,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137379190] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:17,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:17,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:34:17,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625789942] [2021-11-07 01:34:17,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:34:17,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:17,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:34:17,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:34:17,692 INFO L87 Difference]: Start difference. First operand 701 states and 1221 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:18,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:18,009 INFO L93 Difference]: Finished difference Result 2721 states and 4746 transitions. [2021-11-07 01:34:18,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:34:18,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:34:18,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:18,031 INFO L225 Difference]: With dead ends: 2721 [2021-11-07 01:34:18,031 INFO L226 Difference]: Without dead ends: 2038 [2021-11-07 01:34:18,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 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 01:34:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-11-07 01:34:18,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 700. [2021-11-07 01:34:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 694 states have (on average 1.7536023054755043) internal successors, (1217), 699 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1217 transitions. [2021-11-07 01:34:18,091 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1217 transitions. Word has length 47 [2021-11-07 01:34:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:18,091 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1217 transitions. [2021-11-07 01:34:18,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:18,092 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1217 transitions. [2021-11-07 01:34:18,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:34:18,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:18,095 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:18,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:18,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:18,310 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:18,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:18,310 INFO L85 PathProgramCache]: Analyzing trace with hash -572142200, now seen corresponding path program 1 times [2021-11-07 01:34:18,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:18,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615033094] [2021-11-07 01:34:18,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:18,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:18,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:18,312 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:18,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:34:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:18,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:34:18,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:18,872 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 01:34:18,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:18,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:18,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615033094] [2021-11-07 01:34:18,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615033094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:18,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:18,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:34:18,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020679619] [2021-11-07 01:34:18,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:34:18,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:18,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:34:18,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:18,997 INFO L87 Difference]: Start difference. First operand 700 states and 1217 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 01:34:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:19,090 INFO L93 Difference]: Finished difference Result 1397 states and 2431 transitions. [2021-11-07 01:34:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:34:19,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 48 [2021-11-07 01:34:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:19,095 INFO L225 Difference]: With dead ends: 1397 [2021-11-07 01:34:19,096 INFO L226 Difference]: Without dead ends: 705 [2021-11-07 01:34:19,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 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 01:34:19,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-11-07 01:34:19,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 700. [2021-11-07 01:34:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 694 states have (on average 1.7492795389048992) internal successors, (1214), 699 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1214 transitions. [2021-11-07 01:34:19,143 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1214 transitions. Word has length 48 [2021-11-07 01:34:19,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:19,144 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1214 transitions. [2021-11-07 01:34:19,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 01:34:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1214 transitions. [2021-11-07 01:34:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:34:19,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:19,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:19,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:19,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:19,362 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:19,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:19,363 INFO L85 PathProgramCache]: Analyzing trace with hash 455771997, now seen corresponding path program 1 times [2021-11-07 01:34:19,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:19,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263728600] [2021-11-07 01:34:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:19,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:19,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:19,365 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:19,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:34:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:19,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:34:19,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:19,923 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 01:34:19,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:20,077 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 01:34:20,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:20,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263728600] [2021-11-07 01:34:20,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263728600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:20,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:20,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:34:20,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134862463] [2021-11-07 01:34:20,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:34:20,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:34:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:34:20,080 INFO L87 Difference]: Start difference. First operand 700 states and 1214 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:20,416 INFO L93 Difference]: Finished difference Result 2708 states and 4722 transitions. [2021-11-07 01:34:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:34:20,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:34:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:20,430 INFO L225 Difference]: With dead ends: 2708 [2021-11-07 01:34:20,430 INFO L226 Difference]: Without dead ends: 2034 [2021-11-07 01:34:20,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 01:34:20,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-11-07 01:34:20,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 700. [2021-11-07 01:34:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 694 states have (on average 1.744956772334294) internal successors, (1211), 699 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1211 transitions. [2021-11-07 01:34:20,491 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1211 transitions. Word has length 49 [2021-11-07 01:34:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:20,491 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1211 transitions. [2021-11-07 01:34:20,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1211 transitions. [2021-11-07 01:34:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:34:20,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:20,493 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] [2021-11-07 01:34:20,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:20,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:20,708 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1266463272, now seen corresponding path program 1 times [2021-11-07 01:34:20,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:20,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123241073] [2021-11-07 01:34:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:20,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:20,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:20,712 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:20,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:34:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:21,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:21,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:21,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:21,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:21,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123241073] [2021-11-07 01:34:21,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123241073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:21,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:21,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:34:21,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761853520] [2021-11-07 01:34:21,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:34:21,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:34:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:21,453 INFO L87 Difference]: Start difference. First operand 700 states and 1211 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:21,578 INFO L93 Difference]: Finished difference Result 1795 states and 3105 transitions. [2021-11-07 01:34:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:34:21,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:34:21,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:21,587 INFO L225 Difference]: With dead ends: 1795 [2021-11-07 01:34:21,588 INFO L226 Difference]: Without dead ends: 1374 [2021-11-07 01:34:21,589 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 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 01:34:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-11-07 01:34:21,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 953. [2021-11-07 01:34:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 947 states have (on average 1.770855332629356) internal successors, (1677), 952 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1677 transitions. [2021-11-07 01:34:21,671 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1677 transitions. Word has length 51 [2021-11-07 01:34:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:21,672 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 1677 transitions. [2021-11-07 01:34:21,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1677 transitions. [2021-11-07 01:34:21,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:34:21,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:21,674 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 01:34:21,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:21,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:21,889 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:21,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1487574921, now seen corresponding path program 1 times [2021-11-07 01:34:21,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:21,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124841828] [2021-11-07 01:34:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:21,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:21,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:21,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:21,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:34:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:22,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:22,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:22,486 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 01:34:22,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:22,627 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 01:34:22,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:22,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124841828] [2021-11-07 01:34:22,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124841828] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:22,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:22,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:22,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326146085] [2021-11-07 01:34:22,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:22,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:22,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:22,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:22,629 INFO L87 Difference]: Start difference. First operand 953 states and 1677 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 01:34:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:22,769 INFO L93 Difference]: Finished difference Result 2444 states and 4304 transitions. [2021-11-07 01:34:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:22,769 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 01:34:22,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:22,780 INFO L225 Difference]: With dead ends: 2444 [2021-11-07 01:34:22,780 INFO L226 Difference]: Without dead ends: 1575 [2021-11-07 01:34:22,785 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 01:34:22,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-11-07 01:34:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1154. [2021-11-07 01:34:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1148 states have (on average 1.7822299651567943) internal successors, (2046), 1153 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 2046 transitions. [2021-11-07 01:34:22,882 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 2046 transitions. Word has length 63 [2021-11-07 01:34:22,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:22,884 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 2046 transitions. [2021-11-07 01:34:22,885 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 01:34:22,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 2046 transitions. [2021-11-07 01:34:22,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:34:22,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:22,888 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 01:34:22,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:23,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:23,103 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:23,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1362015080, now seen corresponding path program 1 times [2021-11-07 01:34:23,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:23,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598443599] [2021-11-07 01:34:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:23,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:23,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:23,110 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:23,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:34:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:23,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:23,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:23,790 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 01:34:23,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:23,966 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 01:34:23,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:23,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598443599] [2021-11-07 01:34:23,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598443599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:23,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:23,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:23,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714585503] [2021-11-07 01:34:23,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:23,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:23,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:23,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:23,968 INFO L87 Difference]: Start difference. First operand 1154 states and 2046 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 01:34:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:24,116 INFO L93 Difference]: Finished difference Result 3091 states and 5497 transitions. [2021-11-07 01:34:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:24,117 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 01:34:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:24,130 INFO L225 Difference]: With dead ends: 3091 [2021-11-07 01:34:24,131 INFO L226 Difference]: Without dead ends: 2025 [2021-11-07 01:34:24,134 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 01:34:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-11-07 01:34:24,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1604. [2021-11-07 01:34:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1598 states have (on average 1.7984981226533165) internal successors, (2874), 1603 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2874 transitions. [2021-11-07 01:34:24,264 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2874 transitions. Word has length 64 [2021-11-07 01:34:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:24,264 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 2874 transitions. [2021-11-07 01:34:24,264 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 01:34:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2874 transitions. [2021-11-07 01:34:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:34:24,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:24,268 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:24,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:24,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:24,490 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:24,490 INFO L85 PathProgramCache]: Analyzing trace with hash -213368008, now seen corresponding path program 1 times [2021-11-07 01:34:24,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:24,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017586924] [2021-11-07 01:34:24,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:24,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:24,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:24,493 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:24,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:34:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:24,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:24,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:25,081 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 01:34:25,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:25,230 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 01:34:25,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:25,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017586924] [2021-11-07 01:34:25,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017586924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:25,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:25,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:34:25,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675544207] [2021-11-07 01:34:25,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:34:25,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:25,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:34:25,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:25,232 INFO L87 Difference]: Start difference. First operand 1604 states and 2874 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:25,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:25,381 INFO L93 Difference]: Finished difference Result 3344 states and 5960 transitions. [2021-11-07 01:34:25,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:25,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:34:25,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:25,395 INFO L225 Difference]: With dead ends: 3344 [2021-11-07 01:34:25,395 INFO L226 Difference]: Without dead ends: 2025 [2021-11-07 01:34:25,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 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 01:34:25,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-11-07 01:34:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1604. [2021-11-07 01:34:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1598 states have (on average 1.7972465581977473) internal successors, (2872), 1603 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2872 transitions. [2021-11-07 01:34:25,507 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2872 transitions. Word has length 65 [2021-11-07 01:34:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:25,508 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 2872 transitions. [2021-11-07 01:34:25,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2872 transitions. [2021-11-07 01:34:25,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:34:25,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:25,511 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:25,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:25,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:25,733 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:25,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:25,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1827881911, now seen corresponding path program 1 times [2021-11-07 01:34:25,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:25,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108993153] [2021-11-07 01:34:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:25,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:25,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:25,736 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:25,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:34:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:26,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:26,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:26,381 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 01:34:26,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:26,550 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 01:34:26,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:26,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108993153] [2021-11-07 01:34:26,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108993153] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:26,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:26,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:26,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344928221] [2021-11-07 01:34:26,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:26,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:26,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:26,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:26,553 INFO L87 Difference]: Start difference. First operand 1604 states and 2872 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:26,755 INFO L93 Difference]: Finished difference Result 4413 states and 7930 transitions. [2021-11-07 01:34:26,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:26,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:34:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:26,775 INFO L225 Difference]: With dead ends: 4413 [2021-11-07 01:34:26,776 INFO L226 Difference]: Without dead ends: 2905 [2021-11-07 01:34:26,780 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:26,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-11-07 01:34:26,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2484. [2021-11-07 01:34:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 2478 states have (on average 1.8123486682808716) internal successors, (4491), 2483 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 4491 transitions. [2021-11-07 01:34:26,990 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 4491 transitions. Word has length 65 [2021-11-07 01:34:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:26,990 INFO L470 AbstractCegarLoop]: Abstraction has 2484 states and 4491 transitions. [2021-11-07 01:34:26,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:26,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 4491 transitions. [2021-11-07 01:34:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:34:27,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:27,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:27,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:27,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:27,219 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2075626966, now seen corresponding path program 1 times [2021-11-07 01:34:27,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:27,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771225452] [2021-11-07 01:34:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:27,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:27,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:27,221 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:27,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:34:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:27,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:27,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:27,880 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 01:34:27,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:28,027 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 01:34:28,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:28,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771225452] [2021-11-07 01:34:28,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771225452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:28,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:28,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:28,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205946346] [2021-11-07 01:34:28,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:28,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:28,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:28,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:28,032 INFO L87 Difference]: Start difference. First operand 2484 states and 4491 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:28,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:28,310 INFO L93 Difference]: Finished difference Result 6789 states and 12306 transitions. [2021-11-07 01:34:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:28,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:34:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:28,338 INFO L225 Difference]: With dead ends: 6789 [2021-11-07 01:34:28,338 INFO L226 Difference]: Without dead ends: 4435 [2021-11-07 01:34:28,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:28,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-11-07 01:34:28,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 4014. [2021-11-07 01:34:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4008 states have (on average 1.8223552894211577) internal successors, (7304), 4013 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 7304 transitions. [2021-11-07 01:34:28,621 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 7304 transitions. Word has length 66 [2021-11-07 01:34:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:28,622 INFO L470 AbstractCegarLoop]: Abstraction has 4014 states and 7304 transitions. [2021-11-07 01:34:28,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 7304 transitions. [2021-11-07 01:34:28,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:34:28,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:28,628 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:28,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:28,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:28,842 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:28,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:28,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1657566280, now seen corresponding path program 1 times [2021-11-07 01:34:28,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:28,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262042618] [2021-11-07 01:34:28,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:28,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:28,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:28,844 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:28,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:34:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:29,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:29,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:29,500 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 01:34:29,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:29,694 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 01:34:29,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:29,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262042618] [2021-11-07 01:34:29,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262042618] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:29,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:29,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:29,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555511501] [2021-11-07 01:34:29,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:29,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:29,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:29,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:29,699 INFO L87 Difference]: Start difference. First operand 4014 states and 7304 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:30,105 INFO L93 Difference]: Finished difference Result 11095 states and 20228 transitions. [2021-11-07 01:34:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:34:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:30,149 INFO L225 Difference]: With dead ends: 11095 [2021-11-07 01:34:30,149 INFO L226 Difference]: Without dead ends: 7245 [2021-11-07 01:34:30,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7245 states. [2021-11-07 01:34:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7245 to 6824. [2021-11-07 01:34:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6824 states, 6818 states have (on average 1.828248753300088) internal successors, (12465), 6823 states have internal predecessors, (12465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6824 states to 6824 states and 12465 transitions. [2021-11-07 01:34:30,656 INFO L78 Accepts]: Start accepts. Automaton has 6824 states and 12465 transitions. Word has length 67 [2021-11-07 01:34:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:30,656 INFO L470 AbstractCegarLoop]: Abstraction has 6824 states and 12465 transitions. [2021-11-07 01:34:30,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 6824 states and 12465 transitions. [2021-11-07 01:34:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:34:30,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:30,666 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 01:34:30,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:30,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:30,886 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:30,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:30,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1916756108, now seen corresponding path program 1 times [2021-11-07 01:34:30,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:30,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393759018] [2021-11-07 01:34:30,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:30,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:30,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:30,889 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:30,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:34:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:31,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:31,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:31,642 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 01:34:31,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:31,842 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 01:34:31,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:31,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393759018] [2021-11-07 01:34:31,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393759018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:31,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:31,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:34:31,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770133188] [2021-11-07 01:34:31,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:34:31,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:34:31,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:34:31,845 INFO L87 Difference]: Start difference. First operand 6824 states and 12465 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:35,185 INFO L93 Difference]: Finished difference Result 25819 states and 47216 transitions. [2021-11-07 01:34:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:34:35,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:34:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:35,241 INFO L225 Difference]: With dead ends: 25819 [2021-11-07 01:34:35,242 INFO L226 Difference]: Without dead ends: 19278 [2021-11-07 01:34:35,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 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 01:34:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2021-11-07 01:34:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 6774. [2021-11-07 01:34:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6774 states, 6768 states have (on average 1.8122044917257683) internal successors, (12265), 6773 states have internal predecessors, (12265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6774 states to 6774 states and 12265 transitions. [2021-11-07 01:34:35,865 INFO L78 Accepts]: Start accepts. Automaton has 6774 states and 12265 transitions. Word has length 68 [2021-11-07 01:34:35,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:35,865 INFO L470 AbstractCegarLoop]: Abstraction has 6774 states and 12265 transitions. [2021-11-07 01:34:35,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:35,866 INFO L276 IsEmpty]: Start isEmpty. Operand 6774 states and 12265 transitions. [2021-11-07 01:34:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:34:35,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:35,873 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:35,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:36,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:36,090 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:36,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:36,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1256566565, now seen corresponding path program 1 times [2021-11-07 01:34:36,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:36,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527402139] [2021-11-07 01:34:36,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:36,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:36,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:36,092 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:36,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:34:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:36,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:36,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:36,987 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 01:34:36,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:37,159 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 01:34:37,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:37,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527402139] [2021-11-07 01:34:37,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527402139] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:37,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:37,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:37,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284251674] [2021-11-07 01:34:37,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:37,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:37,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:37,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:37,162 INFO L87 Difference]: Start difference. First operand 6774 states and 12265 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:37,755 INFO L93 Difference]: Finished difference Result 19836 states and 35965 transitions. [2021-11-07 01:34:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:37,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:34:37,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:37,797 INFO L225 Difference]: With dead ends: 19836 [2021-11-07 01:34:37,797 INFO L226 Difference]: Without dead ends: 13229 [2021-11-07 01:34:37,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:37,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13229 states. [2021-11-07 01:34:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13229 to 12808. [2021-11-07 01:34:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12808 states, 12802 states have (on average 1.814247773785346) internal successors, (23226), 12807 states have internal predecessors, (23226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:38,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12808 states to 12808 states and 23226 transitions. [2021-11-07 01:34:38,576 INFO L78 Accepts]: Start accepts. Automaton has 12808 states and 23226 transitions. Word has length 68 [2021-11-07 01:34:38,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:38,576 INFO L470 AbstractCegarLoop]: Abstraction has 12808 states and 23226 transitions. [2021-11-07 01:34:38,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 12808 states and 23226 transitions. [2021-11-07 01:34:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:34:38,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:38,584 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 01:34:38,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:38,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:38,799 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:38,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash -127955705, now seen corresponding path program 1 times [2021-11-07 01:34:38,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:38,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728076259] [2021-11-07 01:34:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:38,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:38,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:38,801 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:38,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:34:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:39,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:39,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:39,583 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 01:34:39,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:39,792 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 01:34:39,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:39,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728076259] [2021-11-07 01:34:39,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728076259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:39,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [313205253] [2021-11-07 01:34:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:39,793 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:39,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:39,803 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:39,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:34:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:40,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:40,818 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 01:34:40,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:41,015 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 01:34:41,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [313205253] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:41,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:34:41,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:34:41,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639874731] [2021-11-07 01:34:41,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:41,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:41,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:41,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:34:41,017 INFO L87 Difference]: Start difference. First operand 12808 states and 23226 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 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 01:34:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:41,847 INFO L93 Difference]: Finished difference Result 13142 states and 23788 transitions. [2021-11-07 01:34:41,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:41,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 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 01:34:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:41,879 INFO L225 Difference]: With dead ends: 13142 [2021-11-07 01:34:41,879 INFO L226 Difference]: Without dead ends: 12810 [2021-11-07 01:34:41,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:34:41,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12810 states. [2021-11-07 01:34:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12810 to 12796. [2021-11-07 01:34:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12796 states, 12792 states have (on average 1.8142589118198875) internal successors, (23208), 12795 states have internal predecessors, (23208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12796 states to 12796 states and 23208 transitions. [2021-11-07 01:34:42,609 INFO L78 Accepts]: Start accepts. Automaton has 12796 states and 23208 transitions. Word has length 69 [2021-11-07 01:34:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:42,610 INFO L470 AbstractCegarLoop]: Abstraction has 12796 states and 23208 transitions. [2021-11-07 01:34:42,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 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 01:34:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 12796 states and 23208 transitions. [2021-11-07 01:34:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 01:34:42,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:42,634 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 01:34:42,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:42,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 01:34:43,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:43,058 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:34:43,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:43,059 INFO L85 PathProgramCache]: Analyzing trace with hash -941046261, now seen corresponding path program 1 times [2021-11-07 01:34:43,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:43,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014917868] [2021-11-07 01:34:43,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:43,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:43,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:43,061 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:43,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:34:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:43,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:43,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:44,074 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 01:34:44,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:44,390 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 01:34:44,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:44,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014917868] [2021-11-07 01:34:44,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014917868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:44,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1086889426] [2021-11-07 01:34:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:44,392 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:44,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:44,394 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:44,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:34:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:45,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:34:45,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:46,016 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 01:34:46,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:46,442 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 01:34:46,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1086889426] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:46,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:34:46,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:34:46,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095689115] [2021-11-07 01:34:46,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:34:46,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:34:46,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:34:46,445 INFO L87 Difference]: Start difference. First operand 12796 states and 23208 transitions. Second operand has 16 states, 16 states have (on average 9.0) internal successors, (144), 15 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:06,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:06,167 INFO L93 Difference]: Finished difference Result 28386 states and 51063 transitions. [2021-11-07 01:35:06,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 01:35:06,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.0) internal successors, (144), 15 states have internal predecessors, (144), 0 states have call successors, (0), 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 01:35:06,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:06,230 INFO L225 Difference]: With dead ends: 28386 [2021-11-07 01:35:06,230 INFO L226 Difference]: Without dead ends: 28034 [2021-11-07 01:35:06,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 01:35:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28034 states. [2021-11-07 01:35:07,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28034 to 25332. [2021-11-07 01:35:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25332 states, 25328 states have (on average 1.8153032217308906) internal successors, (45978), 25331 states have internal predecessors, (45978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:07,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25332 states to 25332 states and 45978 transitions. [2021-11-07 01:35:07,619 INFO L78 Accepts]: Start accepts. Automaton has 25332 states and 45978 transitions. Word has length 99 [2021-11-07 01:35:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:07,620 INFO L470 AbstractCegarLoop]: Abstraction has 25332 states and 45978 transitions. [2021-11-07 01:35:07,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.0) internal successors, (144), 15 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 25332 states and 45978 transitions. [2021-11-07 01:35:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 01:35:07,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:07,650 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] [2021-11-07 01:35:07,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:07,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:35:08,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:08,051 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:08,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1181632275, now seen corresponding path program 1 times [2021-11-07 01:35:08,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:08,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038440684] [2021-11-07 01:35:08,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:08,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:08,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:08,053 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:08,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:35:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:08,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:35:08,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:09,076 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 01:35:09,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:09,342 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 01:35:09,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:09,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038440684] [2021-11-07 01:35:09,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038440684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:09,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1949889258] [2021-11-07 01:35:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:09,342 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:09,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:35:09,343 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:35:09,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:35:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:10,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:35:10,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:10,587 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 01:35:10,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:10,771 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 01:35:10,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1949889258] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:10,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:35:10,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:35:10,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9270087] [2021-11-07 01:35:10,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:35:10,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:35:10,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:35:10,773 INFO L87 Difference]: Start difference. First operand 25332 states and 45978 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:11,673 INFO L93 Difference]: Finished difference Result 26079 states and 47242 transitions. [2021-11-07 01:35:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:35:11,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 100 [2021-11-07 01:35:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:11,713 INFO L225 Difference]: With dead ends: 26079 [2021-11-07 01:35:11,713 INFO L226 Difference]: Without dead ends: 25675 [2021-11-07 01:35:11,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:35:11,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25675 states. [2021-11-07 01:35:12,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25675 to 25331. [2021-11-07 01:35:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25331 states, 25327 states have (on average 1.8152169621352707) internal successors, (45974), 25330 states have internal predecessors, (45974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25331 states to 25331 states and 45974 transitions. [2021-11-07 01:35:12,856 INFO L78 Accepts]: Start accepts. Automaton has 25331 states and 45974 transitions. Word has length 100 [2021-11-07 01:35:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:12,856 INFO L470 AbstractCegarLoop]: Abstraction has 25331 states and 45974 transitions. [2021-11-07 01:35:12,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:12,856 INFO L276 IsEmpty]: Start isEmpty. Operand 25331 states and 45974 transitions. [2021-11-07 01:35:12,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 01:35:12,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:12,887 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] [2021-11-07 01:35:12,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:13,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:13,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:13,288 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:13,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash -36511883, now seen corresponding path program 1 times [2021-11-07 01:35:13,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:13,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492568061] [2021-11-07 01:35:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:13,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:13,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:13,295 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:13,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:35:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:14,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:35:14,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:14,374 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 01:35:14,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:14,646 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 01:35:14,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:14,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492568061] [2021-11-07 01:35:14,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492568061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:14,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2138272340] [2021-11-07 01:35:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:14,647 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:14,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:35:14,654 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:35:14,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:35:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:15,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:35:15,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:16,096 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 01:35:16,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:35:16,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2138272340] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:16,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:35:16,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-07 01:35:16,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470026733] [2021-11-07 01:35:16,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:35:16,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:16,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:35:16,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:35:16,416 INFO L87 Difference]: Start difference. First operand 25331 states and 45974 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:19,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:19,668 INFO L93 Difference]: Finished difference Result 26150 states and 47345 transitions. [2021-11-07 01:35:19,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:35:19,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-07 01:35:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:19,709 INFO L225 Difference]: With dead ends: 26150 [2021-11-07 01:35:19,709 INFO L226 Difference]: Without dead ends: 25480 [2021-11-07 01:35:19,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:35:19,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25480 states. [2021-11-07 01:35:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25480 to 25295. [2021-11-07 01:35:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25295 states, 25291 states have (on average 1.8145980783677989) internal successors, (45893), 25294 states have internal predecessors, (45893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:20,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25295 states to 25295 states and 45893 transitions. [2021-11-07 01:35:20,859 INFO L78 Accepts]: Start accepts. Automaton has 25295 states and 45893 transitions. Word has length 101 [2021-11-07 01:35:20,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:20,859 INFO L470 AbstractCegarLoop]: Abstraction has 25295 states and 45893 transitions. [2021-11-07 01:35:20,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand 25295 states and 45893 transitions. [2021-11-07 01:35:20,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 01:35:20,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:20,880 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] [2021-11-07 01:35:20,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:21,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-07 01:35:21,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:21,281 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:21,282 INFO L85 PathProgramCache]: Analyzing trace with hash 520193613, now seen corresponding path program 1 times [2021-11-07 01:35:21,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:21,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586860189] [2021-11-07 01:35:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:21,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:21,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:21,283 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:21,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:35:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:22,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:35:22,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:22,522 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 01:35:22,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:22,789 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 01:35:22,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:22,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586860189] [2021-11-07 01:35:22,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586860189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:22,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [555328758] [2021-11-07 01:35:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:22,791 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:22,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:35:22,792 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:35:22,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:35:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:24,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:35:24,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:24,693 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 01:35:24,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:25,197 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 01:35:25,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [555328758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:25,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:35:25,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:35:25,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56527265] [2021-11-07 01:35:25,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:35:25,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:25,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:35:25,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:35:25,199 INFO L87 Difference]: Start difference. First operand 25295 states and 45893 transitions. Second operand has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:47,205 INFO L93 Difference]: Finished difference Result 54814 states and 98822 transitions. [2021-11-07 01:35:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:35:47,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 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 101 [2021-11-07 01:35:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:47,287 INFO L225 Difference]: With dead ends: 54814 [2021-11-07 01:35:47,287 INFO L226 Difference]: Without dead ends: 54180 [2021-11-07 01:35:47,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:35:47,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54180 states. [2021-11-07 01:35:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54180 to 50257. [2021-11-07 01:35:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50257 states, 50253 states have (on average 1.8151354148011063) internal successors, (91216), 50256 states have internal predecessors, (91216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50257 states to 50257 states and 91216 transitions. [2021-11-07 01:35:49,649 INFO L78 Accepts]: Start accepts. Automaton has 50257 states and 91216 transitions. Word has length 101 [2021-11-07 01:35:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:49,649 INFO L470 AbstractCegarLoop]: Abstraction has 50257 states and 91216 transitions. [2021-11-07 01:35:49,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 50257 states and 91216 transitions. [2021-11-07 01:35:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 01:35:49,711 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:49,712 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] [2021-11-07 01:35:49,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-07 01:35:49,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-07 01:35:50,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:50,126 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:35:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1529194229, now seen corresponding path program 1 times [2021-11-07 01:35:50,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:50,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020555153] [2021-11-07 01:35:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:50,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:50,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:50,129 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:50,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:35:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:51,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:35:51,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:51,439 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 01:35:51,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:51,726 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 01:35:51,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:51,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020555153] [2021-11-07 01:35:51,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020555153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:51,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [485302748] [2021-11-07 01:35:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:51,727 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:51,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:35:51,728 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:35:51,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:35:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:53,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:35:53,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:53,506 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 01:35:53,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:53,819 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 01:35:53,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [485302748] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:53,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:35:53,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:35:53,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308190332] [2021-11-07 01:35:53,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:35:53,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:53,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:35:53,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:35:53,822 INFO L87 Difference]: Start difference. First operand 50257 states and 91216 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:56,881 INFO L93 Difference]: Finished difference Result 57498 states and 103404 transitions. [2021-11-07 01:35:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:35:56,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-07 01:35:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:56,972 INFO L225 Difference]: With dead ends: 57498 [2021-11-07 01:35:56,972 INFO L226 Difference]: Without dead ends: 55897 [2021-11-07 01:35:56,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:35:57,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55897 states. [2021-11-07 01:35:59,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55897 to 52547. [2021-11-07 01:35:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52547 states, 52543 states have (on average 1.8088232495289573) internal successors, (95041), 52546 states have internal predecessors, (95041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52547 states to 52547 states and 95041 transitions. [2021-11-07 01:35:59,819 INFO L78 Accepts]: Start accepts. Automaton has 52547 states and 95041 transitions. Word has length 101 [2021-11-07 01:35:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:59,819 INFO L470 AbstractCegarLoop]: Abstraction has 52547 states and 95041 transitions. [2021-11-07 01:35:59,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:59,819 INFO L276 IsEmpty]: Start isEmpty. Operand 52547 states and 95041 transitions. [2021-11-07 01:35:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 01:35:59,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:59,900 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 01:35:59,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:00,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:00,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:00,318 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:36:00,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:00,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1866159082, now seen corresponding path program 1 times [2021-11-07 01:36:00,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:00,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846165964] [2021-11-07 01:36:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:00,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:00,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:00,320 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:00,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:36:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:01,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:36:01,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:01,683 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 01:36:01,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:01,940 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 01:36:01,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:01,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846165964] [2021-11-07 01:36:01,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846165964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:01,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1839580649] [2021-11-07 01:36:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:01,941 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:01,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:36:01,942 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:36:01,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:36:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:03,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:36:03,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:03,767 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 01:36:03,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:03,992 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 01:36:03,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1839580649] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:03,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:36:03,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 15 [2021-11-07 01:36:03,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936398483] [2021-11-07 01:36:03,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:36:03,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:03,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:36:03,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:36:03,994 INFO L87 Difference]: Start difference. First operand 52547 states and 95041 transitions. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:07,070 INFO L93 Difference]: Finished difference Result 56747 states and 102047 transitions. [2021-11-07 01:36:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:36:07,071 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-07 01:36:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:07,171 INFO L225 Difference]: With dead ends: 56747 [2021-11-07 01:36:07,171 INFO L226 Difference]: Without dead ends: 53521 [2021-11-07 01:36:07,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:36:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53521 states. [2021-11-07 01:36:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53521 to 51553. [2021-11-07 01:36:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51553 states, 51549 states have (on average 1.8104327921007197) internal successors, (93326), 51552 states have internal predecessors, (93326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51553 states to 51553 states and 93326 transitions. [2021-11-07 01:36:10,150 INFO L78 Accepts]: Start accepts. Automaton has 51553 states and 93326 transitions. Word has length 102 [2021-11-07 01:36:10,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:10,150 INFO L470 AbstractCegarLoop]: Abstraction has 51553 states and 93326 transitions. [2021-11-07 01:36:10,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:10,150 INFO L276 IsEmpty]: Start isEmpty. Operand 51553 states and 93326 transitions. [2021-11-07 01:36:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:36:10,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:10,190 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:10,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:10,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:10,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:10,597 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:36:10,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:10,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1394115534, now seen corresponding path program 1 times [2021-11-07 01:36:10,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:10,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358758460] [2021-11-07 01:36:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:10,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:10,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:10,599 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:10,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:36:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:11,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:36:11,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:12,062 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 01:36:12,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:12,329 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 01:36:12,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:12,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358758460] [2021-11-07 01:36:12,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358758460] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:12,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [598181634] [2021-11-07 01:36:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:12,330 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:12,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:36:12,335 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:36:12,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:36:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:13,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:36:13,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:14,212 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 01:36:14,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:14,406 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 01:36:14,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [598181634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:14,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:36:14,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:36:14,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308007136] [2021-11-07 01:36:14,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:36:14,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:14,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:36:14,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:36:14,409 INFO L87 Difference]: Start difference. First operand 51553 states and 93326 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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 01:36:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:17,398 INFO L93 Difference]: Finished difference Result 57350 states and 102834 transitions. [2021-11-07 01:36:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:36:17,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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 104 [2021-11-07 01:36:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:17,486 INFO L225 Difference]: With dead ends: 57350 [2021-11-07 01:36:17,486 INFO L226 Difference]: Without dead ends: 54854 [2021-11-07 01:36:17,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:36:17,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54854 states. [2021-11-07 01:36:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54854 to 51621. [2021-11-07 01:36:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51621 states, 51617 states have (on average 1.8093651316426758) internal successors, (93394), 51620 states have internal predecessors, (93394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51621 states to 51621 states and 93394 transitions. [2021-11-07 01:36:20,136 INFO L78 Accepts]: Start accepts. Automaton has 51621 states and 93394 transitions. Word has length 104 [2021-11-07 01:36:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:20,136 INFO L470 AbstractCegarLoop]: Abstraction has 51621 states and 93394 transitions. [2021-11-07 01:36:20,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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 01:36:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 51621 states and 93394 transitions. [2021-11-07 01:36:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:36:20,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:20,185 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] [2021-11-07 01:36:20,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-07 01:36:20,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-07 01:36:20,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:20,615 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:36:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:20,615 INFO L85 PathProgramCache]: Analyzing trace with hash -87988143, now seen corresponding path program 1 times [2021-11-07 01:36:20,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:20,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590493263] [2021-11-07 01:36:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:20,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:20,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:20,617 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:20,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:36:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:21,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:36:21,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:22,177 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 01:36:22,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:22,435 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 01:36:22,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:22,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590493263] [2021-11-07 01:36:22,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590493263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:22,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1939541607] [2021-11-07 01:36:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:22,436 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:22,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:36:22,437 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:36:22,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 01:36:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:24,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:36:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:24,612 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 01:36:24,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:24,829 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 01:36:24,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1939541607] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:24,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:36:24,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 01:36:24,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63246851] [2021-11-07 01:36:24,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:36:24,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:24,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:36:24,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:36:24,832 INFO L87 Difference]: Start difference. First operand 51621 states and 93394 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 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 01:36:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:27,506 INFO L93 Difference]: Finished difference Result 55825 states and 100303 transitions. [2021-11-07 01:36:27,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:36:27,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 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 104 [2021-11-07 01:36:27,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:27,591 INFO L225 Difference]: With dead ends: 55825 [2021-11-07 01:36:27,591 INFO L226 Difference]: Without dead ends: 53118 [2021-11-07 01:36:27,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 402 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 01:36:27,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53118 states. [2021-11-07 01:36:30,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53118 to 51394. [2021-11-07 01:36:30,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51394 states, 51390 states have (on average 1.8096906012842966) internal successors, (93000), 51393 states have internal predecessors, (93000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51394 states to 51394 states and 93000 transitions. [2021-11-07 01:36:30,372 INFO L78 Accepts]: Start accepts. Automaton has 51394 states and 93000 transitions. Word has length 104 [2021-11-07 01:36:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:30,373 INFO L470 AbstractCegarLoop]: Abstraction has 51394 states and 93000 transitions. [2021-11-07 01:36:30,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 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 01:36:30,373 INFO L276 IsEmpty]: Start isEmpty. Operand 51394 states and 93000 transitions. [2021-11-07 01:36:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 01:36:30,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:30,432 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] [2021-11-07 01:36:30,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:30,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-07 01:36:30,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:30,835 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:36:30,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:30,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1420953601, now seen corresponding path program 1 times [2021-11-07 01:36:30,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:30,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327682931] [2021-11-07 01:36:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:30,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:30,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:30,837 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:30,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:36:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:32,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:36:32,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:32,683 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 01:36:32,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:32,968 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 01:36:32,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:32,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327682931] [2021-11-07 01:36:32,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327682931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:32,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1787544774] [2021-11-07 01:36:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:32,968 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:32,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:36:32,969 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:36:32,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b751bc5-72f1-4c9e-b709-2388b8d89491/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 01:36:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:34,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:36:34,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:35,165 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 01:36:35,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:35,425 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 01:36:35,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1787544774] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:35,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:36:35,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:36:35,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019088555] [2021-11-07 01:36:35,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:36:35,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:35,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:36:35,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:36:35,427 INFO L87 Difference]: Start difference. First operand 51394 states and 93000 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)