./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product25.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_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/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_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/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_3afcba2c-0c21-4045-961a-3366e15fd064/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 c862f9fbd969695db1625134466cee856e407b57f937740cfce5c982a0b9c02a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:03:13,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:03:13,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:03:13,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:03:13,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:03:13,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:03:13,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:03:13,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:03:13,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:03:13,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:03:13,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:03:13,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:03:13,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:03:13,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:03:13,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:03:13,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:03:13,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:03:13,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:03:13,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:03:13,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:03:13,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:03:13,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:03:13,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:03:13,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:03:13,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:03:13,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:03:13,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:03:13,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:03:13,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:03:13,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:03:13,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:03:13,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:03:13,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:03:13,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:03:13,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:03:13,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:03:13,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:03:13,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:03:13,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:03:13,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:03:13,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:03:13,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:03:13,215 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:03:13,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:03:13,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:03:13,217 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:03:13,217 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:03:13,217 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:03:13,221 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:03:13,221 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:03:13,222 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:03:13,222 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:03:13,223 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:03:13,223 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:03:13,224 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:03:13,224 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:03:13,224 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:03:13,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:03:13,226 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:03:13,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:03:13,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:03:13,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:03:13,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:03:13,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:03:13,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:03:13,228 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:03:13,228 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:03:13,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:03:13,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:03:13,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:03:13,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:03:13,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:03:13,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:13,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:03:13,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:03:13,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:03:13,233 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:03:13,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:03:13,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:03:13,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:03:13,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:03:13,234 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_3afcba2c-0c21-4045-961a-3366e15fd064/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c862f9fbd969695db1625134466cee856e407b57f937740cfce5c982a0b9c02a [2021-11-07 01:03:13,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:03:13,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:03:13,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:03:13,713 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:03:13,714 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:03:13,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product25.cil.c [2021-11-07 01:03:13,811 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/data/41eb93611/0e81385f40b746838ac61bccdd8b639b/FLAGf122cf5ea [2021-11-07 01:03:14,632 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:03:14,633 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/sv-benchmarks/c/product-lines/email_spec27_product25.cil.c [2021-11-07 01:03:14,657 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/data/41eb93611/0e81385f40b746838ac61bccdd8b639b/FLAGf122cf5ea [2021-11-07 01:03:14,817 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/data/41eb93611/0e81385f40b746838ac61bccdd8b639b [2021-11-07 01:03:14,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:03:14,825 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:03:14,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:14,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:03:14,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:03:14,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:14" (1/1) ... [2021-11-07 01:03:14,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@706fa627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:14, skipping insertion in model container [2021-11-07 01:03:14,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:14" (1/1) ... [2021-11-07 01:03:14,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:03:14,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:03:15,661 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_3afcba2c-0c21-4045-961a-3366e15fd064/sv-benchmarks/c/product-lines/email_spec27_product25.cil.c[58911,58924] [2021-11-07 01:03:15,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:15,730 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 01:03:15,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c6cf538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:15, skipping insertion in model container [2021-11-07 01:03:15,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:15,732 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:03:15,735 INFO L168 Benchmark]: Toolchain (without parser) took 907.81 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 50.8 MB in the beginning and 81.6 MB in the end (delta: -30.8 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:15,736 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory was 69.6 MB in the beginning and 69.5 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:03:15,737 INFO L168 Benchmark]: CACSL2BoogieTranslator took 904.85 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 50.6 MB in the beginning and 81.6 MB in the end (delta: -31.0 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:15,739 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory was 69.6 MB in the beginning and 69.5 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 904.85 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 50.6 MB in the beginning and 81.6 MB in the end (delta: -31.0 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2296]: 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_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/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_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/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_3afcba2c-0c21-4045-961a-3366e15fd064/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 c862f9fbd969695db1625134466cee856e407b57f937740cfce5c982a0b9c02a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:03:18,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:03:18,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:03:18,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:03:18,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:03:18,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:03:18,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:03:18,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:03:18,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:03:18,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:03:18,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:03:18,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:03:18,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:03:18,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:03:18,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:03:18,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:03:18,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:03:18,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:03:18,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:03:18,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:03:18,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:03:18,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:03:18,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:03:18,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:03:18,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:03:18,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:03:18,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:03:18,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:03:18,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:03:18,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:03:18,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:03:18,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:03:18,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:03:18,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:03:18,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:03:18,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:03:18,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:03:18,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:03:18,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:03:18,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:03:18,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:03:18,689 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:03:18,750 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:03:18,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:03:18,752 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:03:18,753 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:03:18,753 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:03:18,753 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:03:18,754 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:03:18,754 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:03:18,754 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:03:18,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:03:18,758 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:03:18,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:03:18,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:03:18,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:03:18,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:03:18,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:03:18,760 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:03:18,760 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:03:18,760 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:03:18,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:03:18,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:03:18,761 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:03:18,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:03:18,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:03:18,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:03:18,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:03:18,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:18,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:03:18,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:03:18,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:03:18,764 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:03:18,765 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:18,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:03:18,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:03:18,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:03:18,766 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_3afcba2c-0c21-4045-961a-3366e15fd064/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c862f9fbd969695db1625134466cee856e407b57f937740cfce5c982a0b9c02a [2021-11-07 01:03:19,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:03:19,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:03:19,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:03:19,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:03:19,274 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:03:19,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product25.cil.c [2021-11-07 01:03:19,369 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/data/8c594a948/a339f7ef8b97442ba5fec4351e33b9dc/FLAG623edf1c6 [2021-11-07 01:03:20,261 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:03:20,262 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/sv-benchmarks/c/product-lines/email_spec27_product25.cil.c [2021-11-07 01:03:20,286 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/data/8c594a948/a339f7ef8b97442ba5fec4351e33b9dc/FLAG623edf1c6 [2021-11-07 01:03:20,417 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/data/8c594a948/a339f7ef8b97442ba5fec4351e33b9dc [2021-11-07 01:03:20,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:03:20,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:03:20,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:20,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:03:20,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:03:20,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:20" (1/1) ... [2021-11-07 01:03:20,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@204af24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:20, skipping insertion in model container [2021-11-07 01:03:20,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:20" (1/1) ... [2021-11-07 01:03:20,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:03:20,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:03:21,337 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_3afcba2c-0c21-4045-961a-3366e15fd064/sv-benchmarks/c/product-lines/email_spec27_product25.cil.c[58911,58924] [2021-11-07 01:03:21,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:21,433 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:03:21,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:03:21,631 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_3afcba2c-0c21-4045-961a-3366e15fd064/sv-benchmarks/c/product-lines/email_spec27_product25.cil.c[58911,58924] [2021-11-07 01:03:21,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:21,669 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:03:21,810 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_3afcba2c-0c21-4045-961a-3366e15fd064/sv-benchmarks/c/product-lines/email_spec27_product25.cil.c[58911,58924] [2021-11-07 01:03:21,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:21,917 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:03:21,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:21 WrapperNode [2021-11-07 01:03:21,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:21,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:21,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:03:21,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:03:21,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:21" (1/1) ... [2021-11-07 01:03:22,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:21" (1/1) ... [2021-11-07 01:03:22,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:22,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:03:22,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:03:22,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:03:22,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:21" (1/1) ... [2021-11-07 01:03:22,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:21" (1/1) ... [2021-11-07 01:03:22,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:21" (1/1) ... [2021-11-07 01:03:22,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:21" (1/1) ... [2021-11-07 01:03:22,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:21" (1/1) ... [2021-11-07 01:03:22,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:21" (1/1) ... [2021-11-07 01:03:22,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:21" (1/1) ... [2021-11-07 01:03:22,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:03:22,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:03:22,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:03:22,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:03:22,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:21" (1/1) ... [2021-11-07 01:03:22,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:22,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:22,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:03:22,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:03:22,489 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:03:22,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:03:22,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:03:22,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:03:22,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:03:28,912 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:03:28,913 INFO L299 CfgBuilder]: Removed 633 assume(true) statements. [2021-11-07 01:03:28,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:28 BoogieIcfgContainer [2021-11-07 01:03:28,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:03:28,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:03:28,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:03:28,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:03:28,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:03:20" (1/3) ... [2021-11-07 01:03:28,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d12a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:28, skipping insertion in model container [2021-11-07 01:03:28,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:21" (2/3) ... [2021-11-07 01:03:28,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d12a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:28, skipping insertion in model container [2021-11-07 01:03:28,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:28" (3/3) ... [2021-11-07 01:03:28,931 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product25.cil.c [2021-11-07 01:03:28,939 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:03:28,939 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:03:29,024 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:03:29,032 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 01:03:29,032 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:03:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 966 states, 959 states have (on average 1.7413972888425444) internal successors, (1670), 965 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:03:29,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:29,111 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 01:03:29,112 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 01:03:29,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:29,119 INFO L85 PathProgramCache]: Analyzing trace with hash -646782772, now seen corresponding path program 1 times [2021-11-07 01:03:29,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:29,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962945036] [2021-11-07 01:03:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:29,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:29,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:29,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:29,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:03:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:29,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:03:29,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:30,066 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 01:03:30,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:30,248 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 01:03:30,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:30,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962945036] [2021-11-07 01:03:30,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962945036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:30,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:30,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:03:30,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556947838] [2021-11-07 01:03:30,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:03:30,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:30,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:03:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:03:30,293 INFO L87 Difference]: Start difference. First operand has 966 states, 959 states have (on average 1.7413972888425444) internal successors, (1670), 965 states have internal predecessors, (1670), 0 states have call successors, (0), 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 25.5) internal successors, (51), 2 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 01:03:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:30,430 INFO L93 Difference]: Finished difference Result 1647 states and 2817 transitions. [2021-11-07 01:03:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:03:30,433 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 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 51 [2021-11-07 01:03:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:30,498 INFO L225 Difference]: With dead ends: 1647 [2021-11-07 01:03:30,499 INFO L226 Difference]: Without dead ends: 898 [2021-11-07 01:03:30,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 100 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 01:03:30,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-11-07 01:03:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2021-11-07 01:03:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 892 states have (on average 1.7410313901345291) internal successors, (1553), 897 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1553 transitions. [2021-11-07 01:03:30,667 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1553 transitions. Word has length 51 [2021-11-07 01:03:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:30,668 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1553 transitions. [2021-11-07 01:03:30,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 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 01:03:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1553 transitions. [2021-11-07 01:03:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:03:30,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:30,676 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:30,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:03:30,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:30,878 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 01:03:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1668149908, now seen corresponding path program 1 times [2021-11-07 01:03:30,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:30,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123427845] [2021-11-07 01:03:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:30,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:30,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:30,883 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:30,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:03:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:31,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:03:31,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:31,729 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 01:03:31,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:31,998 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 01:03:31,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:32,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123427845] [2021-11-07 01:03:32,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123427845] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:32,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:32,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:03:32,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127958679] [2021-11-07 01:03:32,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:03:32,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:03:32,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:32,015 INFO L87 Difference]: Start difference. First operand 898 states and 1553 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 01:03:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:32,256 INFO L93 Difference]: Finished difference Result 2664 states and 4611 transitions. [2021-11-07 01:03:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:03:32,257 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 52 [2021-11-07 01:03:32,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:32,275 INFO L225 Difference]: With dead ends: 2664 [2021-11-07 01:03:32,275 INFO L226 Difference]: Without dead ends: 1781 [2021-11-07 01:03:32,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-11-07 01:03:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 897. [2021-11-07 01:03:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 891 states have (on average 1.7373737373737375) internal successors, (1548), 896 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1548 transitions. [2021-11-07 01:03:32,350 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1548 transitions. Word has length 52 [2021-11-07 01:03:32,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:32,351 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1548 transitions. [2021-11-07 01:03:32,351 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 01:03:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1548 transitions. [2021-11-07 01:03:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:03:32,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:32,367 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:32,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:32,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:32,588 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 01:03:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:32,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1743441262, now seen corresponding path program 1 times [2021-11-07 01:03:32,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:32,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472312638] [2021-11-07 01:03:32,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:32,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:32,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:32,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:32,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:03:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:33,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:03:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:33,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:33,558 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 01:03:33,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:33,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472312638] [2021-11-07 01:03:33,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472312638] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:33,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:33,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:03:33,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602871730] [2021-11-07 01:03:33,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:03:33,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:33,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:03:33,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:03:33,562 INFO L87 Difference]: Start difference. First operand 897 states and 1548 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:34,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:34,051 INFO L93 Difference]: Finished difference Result 3505 states and 6054 transitions. [2021-11-07 01:03:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:03:34,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:03:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:34,072 INFO L225 Difference]: With dead ends: 3505 [2021-11-07 01:03:34,073 INFO L226 Difference]: Without dead ends: 2626 [2021-11-07 01:03:34,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 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 01:03:34,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-11-07 01:03:34,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 896. [2021-11-07 01:03:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 890 states have (on average 1.7348314606741573) internal successors, (1544), 895 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1544 transitions. [2021-11-07 01:03:34,163 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1544 transitions. Word has length 54 [2021-11-07 01:03:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:34,164 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1544 transitions. [2021-11-07 01:03:34,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1544 transitions. [2021-11-07 01:03:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:03:34,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:34,169 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:34,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:34,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:34,389 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 01:03:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2092888837, now seen corresponding path program 1 times [2021-11-07 01:03:34,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:34,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625387461] [2021-11-07 01:03:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:34,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:34,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:34,401 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:34,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:03:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:35,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:03:35,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:35,224 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 01:03:35,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:35,451 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 01:03:35,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:35,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625387461] [2021-11-07 01:03:35,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625387461] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:35,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:35,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:03:35,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411136458] [2021-11-07 01:03:35,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:03:35,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:03:35,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:35,458 INFO L87 Difference]: Start difference. First operand 896 states and 1544 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:35,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:35,588 INFO L93 Difference]: Finished difference Result 1789 states and 3085 transitions. [2021-11-07 01:03:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:03:35,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:03:35,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:35,597 INFO L225 Difference]: With dead ends: 1789 [2021-11-07 01:03:35,597 INFO L226 Difference]: Without dead ends: 901 [2021-11-07 01:03:35,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:35,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-11-07 01:03:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 896. [2021-11-07 01:03:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 890 states have (on average 1.7314606741573033) internal successors, (1541), 895 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1541 transitions. [2021-11-07 01:03:35,675 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1541 transitions. Word has length 55 [2021-11-07 01:03:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:35,676 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1541 transitions. [2021-11-07 01:03:35,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1541 transitions. [2021-11-07 01:03:35,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:03:35,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:35,680 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:35,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:35,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:35,898 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 01:03:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:35,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1186690682, now seen corresponding path program 1 times [2021-11-07 01:03:35,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:35,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579009145] [2021-11-07 01:03:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:35,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:35,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:35,906 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:35,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:03:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:03:36,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:36,703 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 01:03:36,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:36,893 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 01:03:36,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:36,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579009145] [2021-11-07 01:03:36,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579009145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:36,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:36,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:03:36,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144774922] [2021-11-07 01:03:36,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:03:36,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:36,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:03:36,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:03:36,896 INFO L87 Difference]: Start difference. First operand 896 states and 1541 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:37,330 INFO L93 Difference]: Finished difference Result 3492 states and 6030 transitions. [2021-11-07 01:03:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:03:37,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 01:03:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:37,351 INFO L225 Difference]: With dead ends: 3492 [2021-11-07 01:03:37,351 INFO L226 Difference]: Without dead ends: 2622 [2021-11-07 01:03:37,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 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 01:03:37,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-11-07 01:03:37,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 896. [2021-11-07 01:03:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 890 states have (on average 1.7280898876404494) internal successors, (1538), 895 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1538 transitions. [2021-11-07 01:03:37,448 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1538 transitions. Word has length 56 [2021-11-07 01:03:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:37,448 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1538 transitions. [2021-11-07 01:03:37,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:37,449 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1538 transitions. [2021-11-07 01:03:37,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:03:37,451 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:37,451 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:37,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:37,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:37,671 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 01:03:37,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2127663787, now seen corresponding path program 1 times [2021-11-07 01:03:37,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:37,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895473924] [2021-11-07 01:03:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:37,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:37,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:37,680 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:37,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:03:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:38,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:03:38,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:38,472 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 01:03:38,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:38,659 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 01:03:38,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:38,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895473924] [2021-11-07 01:03:38,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895473924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:38,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:38,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:03:38,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231547148] [2021-11-07 01:03:38,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:03:38,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:38,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:03:38,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:38,662 INFO L87 Difference]: Start difference. First operand 896 states and 1538 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:38,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:38,878 INFO L93 Difference]: Finished difference Result 2379 states and 4079 transitions. [2021-11-07 01:03:38,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:03:38,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:03:38,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:38,892 INFO L225 Difference]: With dead ends: 2379 [2021-11-07 01:03:38,892 INFO L226 Difference]: Without dead ends: 1766 [2021-11-07 01:03:38,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-11-07 01:03:39,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1153. [2021-11-07 01:03:39,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1147 states have (on average 1.7532693984306889) internal successors, (2011), 1152 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:39,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 2011 transitions. [2021-11-07 01:03:39,058 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 2011 transitions. Word has length 58 [2021-11-07 01:03:39,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:39,058 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 2011 transitions. [2021-11-07 01:03:39,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:39,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 2011 transitions. [2021-11-07 01:03:39,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:03:39,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:39,062 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:39,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:39,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:39,281 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 01:03:39,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:39,282 INFO L85 PathProgramCache]: Analyzing trace with hash 184708858, now seen corresponding path program 1 times [2021-11-07 01:03:39,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:39,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612645530] [2021-11-07 01:03:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:39,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:39,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:39,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:39,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:03:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:03:39,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:40,049 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 01:03:40,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:40,250 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 01:03:40,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:40,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612645530] [2021-11-07 01:03:40,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612645530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:40,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:40,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:03:40,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335363235] [2021-11-07 01:03:40,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:40,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:40,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:40,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:40,253 INFO L87 Difference]: Start difference. First operand 1153 states and 2011 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:40,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:40,446 INFO L93 Difference]: Finished difference Result 3040 states and 5299 transitions. [2021-11-07 01:03:40,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:40,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:03:40,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:40,460 INFO L225 Difference]: With dead ends: 3040 [2021-11-07 01:03:40,461 INFO L226 Difference]: Without dead ends: 1971 [2021-11-07 01:03:40,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:40,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-11-07 01:03:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1358. [2021-11-07 01:03:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1352 states have (on average 1.7655325443786982) internal successors, (2387), 1357 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 2387 transitions. [2021-11-07 01:03:40,623 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 2387 transitions. Word has length 70 [2021-11-07 01:03:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:40,624 INFO L470 AbstractCegarLoop]: Abstraction has 1358 states and 2387 transitions. [2021-11-07 01:03:40,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 2387 transitions. [2021-11-07 01:03:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:03:40,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:40,628 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, 1, 1, 1, 1] [2021-11-07 01:03:40,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:40,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:40,846 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 01:03:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:40,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1927285307, now seen corresponding path program 1 times [2021-11-07 01:03:40,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:40,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688438248] [2021-11-07 01:03:40,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:40,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:40,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:40,850 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:40,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:03:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:41,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:03:41,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:41,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:41,825 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 01:03:41,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:41,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688438248] [2021-11-07 01:03:41,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688438248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:41,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:41,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:03:41,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834851090] [2021-11-07 01:03:41,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:41,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:41,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:41,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:41,828 INFO L87 Difference]: Start difference. First operand 1358 states and 2387 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:42,072 INFO L93 Difference]: Finished difference Result 3699 states and 6513 transitions. [2021-11-07 01:03:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:42,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:03:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:42,092 INFO L225 Difference]: With dead ends: 3699 [2021-11-07 01:03:42,092 INFO L226 Difference]: Without dead ends: 2429 [2021-11-07 01:03:42,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:42,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-11-07 01:03:42,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1816. [2021-11-07 01:03:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1810 states have (on average 1.7839779005524863) internal successors, (3229), 1815 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 3229 transitions. [2021-11-07 01:03:42,258 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 3229 transitions. Word has length 71 [2021-11-07 01:03:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:42,259 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 3229 transitions. [2021-11-07 01:03:42,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 3229 transitions. [2021-11-07 01:03:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:03:42,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:42,264 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:42,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:42,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:42,478 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 01:03:42,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:42,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1341116747, now seen corresponding path program 1 times [2021-11-07 01:03:42,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:42,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642757881] [2021-11-07 01:03:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:42,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:42,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:42,482 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:42,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:03:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:43,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:03:43,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:43,419 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 01:03:43,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:43,598 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 01:03:43,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:43,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642757881] [2021-11-07 01:03:43,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642757881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:43,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:43,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:03:43,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606450237] [2021-11-07 01:03:43,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:03:43,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:43,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:03:43,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:43,602 INFO L87 Difference]: Start difference. First operand 1816 states and 3229 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:43,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:43,833 INFO L93 Difference]: Finished difference Result 3956 states and 6983 transitions. [2021-11-07 01:03:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:43,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:03:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:43,851 INFO L225 Difference]: With dead ends: 3956 [2021-11-07 01:03:43,852 INFO L226 Difference]: Without dead ends: 2429 [2021-11-07 01:03:43,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-11-07 01:03:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1816. [2021-11-07 01:03:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1810 states have (on average 1.7828729281767957) internal successors, (3227), 1815 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 3227 transitions. [2021-11-07 01:03:44,016 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 3227 transitions. Word has length 72 [2021-11-07 01:03:44,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:44,017 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 3227 transitions. [2021-11-07 01:03:44,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 3227 transitions. [2021-11-07 01:03:44,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:03:44,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:44,028 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:44,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:44,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:44,241 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 01:03:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash 173429516, now seen corresponding path program 1 times [2021-11-07 01:03:44,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:44,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362790283] [2021-11-07 01:03:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:44,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:44,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:44,245 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:44,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:03:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:44,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:03:44,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:45,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:45,286 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 01:03:45,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:45,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362790283] [2021-11-07 01:03:45,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362790283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:45,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:45,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:03:45,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578672441] [2021-11-07 01:03:45,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:45,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:45,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:45,288 INFO L87 Difference]: Start difference. First operand 1816 states and 3227 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:45,560 INFO L93 Difference]: Finished difference Result 5045 states and 8988 transitions. [2021-11-07 01:03:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:45,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:03:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:45,586 INFO L225 Difference]: With dead ends: 5045 [2021-11-07 01:03:45,586 INFO L226 Difference]: Without dead ends: 3325 [2021-11-07 01:03:45,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:45,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2021-11-07 01:03:45,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 2712. [2021-11-07 01:03:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2706 states have (on average 1.8011825572801183) internal successors, (4874), 2711 states have internal predecessors, (4874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 4874 transitions. [2021-11-07 01:03:45,831 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 4874 transitions. Word has length 72 [2021-11-07 01:03:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:45,832 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 4874 transitions. [2021-11-07 01:03:45,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:45,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 4874 transitions. [2021-11-07 01:03:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:03:45,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:45,839 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:45,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:46,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:46,055 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 01:03:46,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:46,056 INFO L85 PathProgramCache]: Analyzing trace with hash 429428025, now seen corresponding path program 1 times [2021-11-07 01:03:46,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:46,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138345560] [2021-11-07 01:03:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:46,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:46,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:46,058 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:46,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:03:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:46,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:03:46,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:46,862 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 01:03:46,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:47,052 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 01:03:47,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:47,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138345560] [2021-11-07 01:03:47,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138345560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:47,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:47,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:03:47,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216376724] [2021-11-07 01:03:47,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:47,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:47,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:47,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:47,056 INFO L87 Difference]: Start difference. First operand 2712 states and 4874 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:47,377 INFO L93 Difference]: Finished difference Result 7469 states and 13448 transitions. [2021-11-07 01:03:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:47,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:03:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:47,427 INFO L225 Difference]: With dead ends: 7469 [2021-11-07 01:03:47,428 INFO L226 Difference]: Without dead ends: 4887 [2021-11-07 01:03:47,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4887 states. [2021-11-07 01:03:47,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4887 to 4274. [2021-11-07 01:03:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4274 states, 4268 states have (on average 1.814198687910028) internal successors, (7743), 4273 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4274 states to 4274 states and 7743 transitions. [2021-11-07 01:03:47,779 INFO L78 Accepts]: Start accepts. Automaton has 4274 states and 7743 transitions. Word has length 73 [2021-11-07 01:03:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:47,781 INFO L470 AbstractCegarLoop]: Abstraction has 4274 states and 7743 transitions. [2021-11-07 01:03:47,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 4274 states and 7743 transitions. [2021-11-07 01:03:47,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:03:47,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:47,813 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:47,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:48,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:48,032 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 01:03:48,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:48,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1924035237, now seen corresponding path program 1 times [2021-11-07 01:03:48,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:48,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044621191] [2021-11-07 01:03:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:48,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:48,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:48,035 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:48,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:03:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:48,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:03:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:48,871 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 01:03:48,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:49,093 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 01:03:49,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:49,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044621191] [2021-11-07 01:03:49,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044621191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:49,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:49,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:03:49,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535085722] [2021-11-07 01:03:49,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:49,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:49,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:49,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:49,095 INFO L87 Difference]: Start difference. First operand 4274 states and 7743 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:49,587 INFO L93 Difference]: Finished difference Result 11871 states and 21538 transitions. [2021-11-07 01:03:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:49,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:03:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:49,614 INFO L225 Difference]: With dead ends: 11871 [2021-11-07 01:03:49,614 INFO L226 Difference]: Without dead ends: 7761 [2021-11-07 01:03:49,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:49,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7761 states. [2021-11-07 01:03:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7761 to 7148. [2021-11-07 01:03:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7148 states, 7142 states have (on average 1.8224586950434052) internal successors, (13016), 7147 states have internal predecessors, (13016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:50,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7148 states to 7148 states and 13016 transitions. [2021-11-07 01:03:50,195 INFO L78 Accepts]: Start accepts. Automaton has 7148 states and 13016 transitions. Word has length 74 [2021-11-07 01:03:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:50,195 INFO L470 AbstractCegarLoop]: Abstraction has 7148 states and 13016 transitions. [2021-11-07 01:03:50,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 7148 states and 13016 transitions. [2021-11-07 01:03:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:03:50,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:50,206 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] [2021-11-07 01:03:50,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:50,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:50,422 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 01:03:50,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash -183448201, now seen corresponding path program 1 times [2021-11-07 01:03:50,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:50,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208515893] [2021-11-07 01:03:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:50,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:50,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:50,425 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:50,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:03:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:51,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:03:51,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:51,348 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 01:03:51,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:51,595 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 01:03:51,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:51,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208515893] [2021-11-07 01:03:51,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208515893] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:51,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:51,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:03:51,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806935699] [2021-11-07 01:03:51,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:03:51,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:51,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:03:51,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:03:51,597 INFO L87 Difference]: Start difference. First operand 7148 states and 13016 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:55,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:55,254 INFO L93 Difference]: Finished difference Result 27103 states and 49399 transitions. [2021-11-07 01:03:55,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:03:55,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:03:55,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:55,327 INFO L225 Difference]: With dead ends: 27103 [2021-11-07 01:03:55,327 INFO L226 Difference]: Without dead ends: 20242 [2021-11-07 01:03:55,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 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 01:03:55,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20242 states. [2021-11-07 01:03:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20242 to 7098. [2021-11-07 01:03:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7098 states, 7092 states have (on average 1.8071065989847717) internal successors, (12816), 7097 states have internal predecessors, (12816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 12816 transitions. [2021-11-07 01:03:55,985 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 12816 transitions. Word has length 75 [2021-11-07 01:03:55,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:55,986 INFO L470 AbstractCegarLoop]: Abstraction has 7098 states and 12816 transitions. [2021-11-07 01:03:55,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:55,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 12816 transitions. [2021-11-07 01:03:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:03:55,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:55,998 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:56,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:56,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:56,214 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 01:03:56,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:56,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1556023960, now seen corresponding path program 1 times [2021-11-07 01:03:56,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:56,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251036013] [2021-11-07 01:03:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:56,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:56,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:56,217 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:56,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:03:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:56,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:03:56,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:57,164 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 01:03:57,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:57,350 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 01:03:57,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:57,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251036013] [2021-11-07 01:03:57,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251036013] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:57,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:57,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:03:57,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676183100] [2021-11-07 01:03:57,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:57,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:57,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:57,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:57,353 INFO L87 Difference]: Start difference. First operand 7098 states and 12816 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:58,026 INFO L93 Difference]: Finished difference Result 20672 states and 37380 transitions. [2021-11-07 01:03:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:58,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:03:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:58,066 INFO L225 Difference]: With dead ends: 20672 [2021-11-07 01:03:58,066 INFO L226 Difference]: Without dead ends: 13745 [2021-11-07 01:03:58,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13745 states. [2021-11-07 01:03:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13745 to 13132. [2021-11-07 01:03:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13132 states, 13126 states have (on average 1.8114429376809387) internal successors, (23777), 13131 states have internal predecessors, (23777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13132 states to 13132 states and 23777 transitions. [2021-11-07 01:03:58,839 INFO L78 Accepts]: Start accepts. Automaton has 13132 states and 23777 transitions. Word has length 75 [2021-11-07 01:03:58,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:58,839 INFO L470 AbstractCegarLoop]: Abstraction has 13132 states and 23777 transitions. [2021-11-07 01:03:58,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:58,840 INFO L276 IsEmpty]: Start isEmpty. Operand 13132 states and 23777 transitions. [2021-11-07 01:03:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:03:58,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:58,920 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:58,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:59,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:59,121 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 01:03:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash -405294948, now seen corresponding path program 1 times [2021-11-07 01:03:59,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:59,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203061067] [2021-11-07 01:03:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:59,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:59,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:59,123 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:59,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:03:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:59,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:03:59,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:00,122 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 01:04:00,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:00,365 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 01:04:00,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:00,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203061067] [2021-11-07 01:04:00,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203061067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:00,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1485560824] [2021-11-07 01:04:00,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:00,366 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:00,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:00,368 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:00,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:04:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:01,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:04:01,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:01,637 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 01:04:01,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:01,914 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 01:04:01,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1485560824] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:01,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:01,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:04:01,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368824126] [2021-11-07 01:04:01,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:04:01,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:01,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:04:01,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:04:01,917 INFO L87 Difference]: Start difference. First operand 13132 states and 23777 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:08,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:08,595 INFO L93 Difference]: Finished difference Result 82472 states and 149373 transitions. [2021-11-07 01:04:08,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:04:08,595 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:04:08,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:08,800 INFO L225 Difference]: With dead ends: 82472 [2021-11-07 01:04:08,800 INFO L226 Difference]: Without dead ends: 81877 [2021-11-07 01:04:08,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:04:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81877 states. [2021-11-07 01:04:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81877 to 25983. [2021-11-07 01:04:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25983 states, 25977 states have (on average 1.8125264657196751) internal successors, (47084), 25982 states have internal predecessors, (47084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25983 states to 25983 states and 47084 transitions. [2021-11-07 01:04:11,536 INFO L78 Accepts]: Start accepts. Automaton has 25983 states and 47084 transitions. Word has length 76 [2021-11-07 01:04:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:11,536 INFO L470 AbstractCegarLoop]: Abstraction has 25983 states and 47084 transitions. [2021-11-07 01:04:11,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 25983 states and 47084 transitions. [2021-11-07 01:04:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:04:11,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:11,561 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] [2021-11-07 01:04:11,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:11,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:04:11,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:11,969 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:11,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1170984460, now seen corresponding path program 1 times [2021-11-07 01:04:11,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:11,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493669178] [2021-11-07 01:04:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:11,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:11,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:11,971 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:11,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:04:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:12,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:12,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:12,905 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 01:04:12,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:13,143 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 01:04:13,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:13,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493669178] [2021-11-07 01:04:13,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493669178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:13,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [143750138] [2021-11-07 01:04:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:13,144 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:13,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:13,150 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:13,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:04:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:14,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:04:14,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:14,385 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 01:04:14,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:14,609 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 01:04:14,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [143750138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:14,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:14,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:04:14,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102011658] [2021-11-07 01:04:14,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:04:14,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:14,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:04:14,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:04:14,613 INFO L87 Difference]: Start difference. First operand 25983 states and 47084 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:18,133 INFO L93 Difference]: Finished difference Result 27179 states and 49106 transitions. [2021-11-07 01:04:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:04:18,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:04:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:18,180 INFO L225 Difference]: With dead ends: 27179 [2021-11-07 01:04:18,180 INFO L226 Difference]: Without dead ends: 26242 [2021-11-07 01:04:18,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:04:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26242 states. [2021-11-07 01:04:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26242 to 25977. [2021-11-07 01:04:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25977 states, 25971 states have (on average 1.812444649801702) internal successors, (47071), 25976 states have internal predecessors, (47071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25977 states to 25977 states and 47071 transitions. [2021-11-07 01:04:19,991 INFO L78 Accepts]: Start accepts. Automaton has 25977 states and 47071 transitions. Word has length 77 [2021-11-07 01:04:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:19,991 INFO L470 AbstractCegarLoop]: Abstraction has 25977 states and 47071 transitions. [2021-11-07 01:04:19,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:19,992 INFO L276 IsEmpty]: Start isEmpty. Operand 25977 states and 47071 transitions. [2021-11-07 01:04:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:04:20,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:20,012 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] [2021-11-07 01:04:20,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:20,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:20,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:20,426 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:20,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:20,426 INFO L85 PathProgramCache]: Analyzing trace with hash 903743817, now seen corresponding path program 1 times [2021-11-07 01:04:20,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:20,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748172434] [2021-11-07 01:04:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:20,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:20,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:20,428 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:20,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:04:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:21,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:04:21,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:21,492 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 01:04:21,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:21,691 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 01:04:21,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:21,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748172434] [2021-11-07 01:04:21,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748172434] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:21,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:21,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:04:21,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252281134] [2021-11-07 01:04:21,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:21,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:21,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:21,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:21,693 INFO L87 Difference]: Start difference. First operand 25977 states and 47071 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:23,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:23,359 INFO L93 Difference]: Finished difference Result 51177 states and 92943 transitions. [2021-11-07 01:04:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:04:23,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:04:23,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:23,400 INFO L225 Difference]: With dead ends: 51177 [2021-11-07 01:04:23,400 INFO L226 Difference]: Without dead ends: 25490 [2021-11-07 01:04:23,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:04:23,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25490 states. [2021-11-07 01:04:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25490 to 13130. [2021-11-07 01:04:24,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13130 states, 13124 states have (on average 1.811033221578787) internal successors, (23768), 13129 states have internal predecessors, (23768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13130 states to 13130 states and 23768 transitions. [2021-11-07 01:04:24,698 INFO L78 Accepts]: Start accepts. Automaton has 13130 states and 23768 transitions. Word has length 77 [2021-11-07 01:04:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:24,699 INFO L470 AbstractCegarLoop]: Abstraction has 13130 states and 23768 transitions. [2021-11-07 01:04:24,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 13130 states and 23768 transitions. [2021-11-07 01:04:24,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:04:24,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:24,707 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] [2021-11-07 01:04:24,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:24,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:24,928 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1838288510, now seen corresponding path program 1 times [2021-11-07 01:04:24,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:24,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689160943] [2021-11-07 01:04:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:24,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:24,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:24,930 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:24,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:04:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:25,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:25,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:26,064 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 01:04:26,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:26,313 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 01:04:26,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:26,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689160943] [2021-11-07 01:04:26,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689160943] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:26,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1715954626] [2021-11-07 01:04:26,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:26,314 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:26,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:26,315 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:26,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:04:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:27,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:04:27,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:27,752 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 01:04:27,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:27,924 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 01:04:27,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1715954626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:27,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:27,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5, 5] total 13 [2021-11-07 01:04:27,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034105969] [2021-11-07 01:04:27,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:04:27,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:27,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:04:27,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:04:27,927 INFO L87 Difference]: Start difference. First operand 13130 states and 23768 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:28,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:28,725 INFO L93 Difference]: Finished difference Result 13621 states and 24587 transitions. [2021-11-07 01:04:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:04:28,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:04:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:28,746 INFO L225 Difference]: With dead ends: 13621 [2021-11-07 01:04:28,746 INFO L226 Difference]: Without dead ends: 13130 [2021-11-07 01:04:28,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:04:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13130 states. [2021-11-07 01:04:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13130 to 13130. [2021-11-07 01:04:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13130 states, 13124 states have (on average 1.8105760438890581) internal successors, (23762), 13129 states have internal predecessors, (23762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:29,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13130 states to 13130 states and 23762 transitions. [2021-11-07 01:04:29,679 INFO L78 Accepts]: Start accepts. Automaton has 13130 states and 23762 transitions. Word has length 79 [2021-11-07 01:04:29,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:29,679 INFO L470 AbstractCegarLoop]: Abstraction has 13130 states and 23762 transitions. [2021-11-07 01:04:29,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:29,680 INFO L276 IsEmpty]: Start isEmpty. Operand 13130 states and 23762 transitions. [2021-11-07 01:04:29,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:04:29,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:29,690 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] [2021-11-07 01:04:29,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-07 01:04:29,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:30,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:30,092 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash 868154393, now seen corresponding path program 1 times [2021-11-07 01:04:30,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:30,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315841115] [2021-11-07 01:04:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:30,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:30,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:30,094 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:30,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:04:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:31,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:31,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:31,307 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 01:04:31,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:31,598 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 01:04:31,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:31,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315841115] [2021-11-07 01:04:31,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315841115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:31,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2035494458] [2021-11-07 01:04:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:31,599 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:31,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:31,600 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:31,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:04:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:32,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:04:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:33,202 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 01:04:33,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:33,455 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 01:04:33,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2035494458] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:33,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:33,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [5, 5] total 17 [2021-11-07 01:04:33,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589193342] [2021-11-07 01:04:33,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:04:33,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:04:33,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:04:33,458 INFO L87 Difference]: Start difference. First operand 13130 states and 23762 transitions. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:37,305 INFO L93 Difference]: Finished difference Result 15957 states and 28445 transitions. [2021-11-07 01:04:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:04:37,306 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:04:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:37,322 INFO L225 Difference]: With dead ends: 15957 [2021-11-07 01:04:37,323 INFO L226 Difference]: Without dead ends: 15466 [2021-11-07 01:04:37,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:04:37,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15466 states. [2021-11-07 01:04:38,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15466 to 13638. [2021-11-07 01:04:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13638 states, 13632 states have (on average 1.8054577464788732) internal successors, (24612), 13637 states have internal predecessors, (24612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13638 states to 13638 states and 24612 transitions. [2021-11-07 01:04:38,135 INFO L78 Accepts]: Start accepts. Automaton has 13638 states and 24612 transitions. Word has length 82 [2021-11-07 01:04:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:38,135 INFO L470 AbstractCegarLoop]: Abstraction has 13638 states and 24612 transitions. [2021-11-07 01:04:38,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 13638 states and 24612 transitions. [2021-11-07 01:04:38,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:04:38,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:38,143 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] [2021-11-07 01:04:38,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:38,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:38,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:38,544 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:38,545 INFO L85 PathProgramCache]: Analyzing trace with hash 797835370, now seen corresponding path program 1 times [2021-11-07 01:04:38,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:38,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850707928] [2021-11-07 01:04:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:38,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:38,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:38,547 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:38,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:04:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:39,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:39,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:39,713 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 01:04:39,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:40,019 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 01:04:40,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:40,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850707928] [2021-11-07 01:04:40,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850707928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:40,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2008005855] [2021-11-07 01:04:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:40,020 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:40,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:40,034 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:40,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:04:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:41,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:04:41,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:41,634 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 01:04:41,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:41,818 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 01:04:41,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2008005855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:41,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:41,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 16 [2021-11-07 01:04:41,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290911457] [2021-11-07 01:04:41,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:04:41,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:41,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:04:41,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:04:41,819 INFO L87 Difference]: Start difference. First operand 13638 states and 24612 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:43,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:43,290 INFO L93 Difference]: Finished difference Result 15168 states and 27159 transitions. [2021-11-07 01:04:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:04:43,291 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:04:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:43,311 INFO L225 Difference]: With dead ends: 15168 [2021-11-07 01:04:43,311 INFO L226 Difference]: Without dead ends: 14174 [2021-11-07 01:04:43,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:04:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14174 states. [2021-11-07 01:04:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14174 to 13626. [2021-11-07 01:04:44,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13626 states, 13620 states have (on average 1.8050660792951543) internal successors, (24585), 13625 states have internal predecessors, (24585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13626 states to 13626 states and 24585 transitions. [2021-11-07 01:04:44,213 INFO L78 Accepts]: Start accepts. Automaton has 13626 states and 24585 transitions. Word has length 83 [2021-11-07 01:04:44,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:44,213 INFO L470 AbstractCegarLoop]: Abstraction has 13626 states and 24585 transitions. [2021-11-07 01:04:44,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:44,214 INFO L276 IsEmpty]: Start isEmpty. Operand 13626 states and 24585 transitions. [2021-11-07 01:04:44,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:04:44,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:44,223 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] [2021-11-07 01:04:44,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 01:04:44,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-07 01:04:44,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:44,624 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:44,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1935620541, now seen corresponding path program 1 times [2021-11-07 01:04:44,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:44,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379917295] [2021-11-07 01:04:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:44,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:44,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:44,627 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:44,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:04:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:45,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:45,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:46,007 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 01:04:46,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:46,323 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 01:04:46,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:46,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379917295] [2021-11-07 01:04:46,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379917295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:46,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1913599286] [2021-11-07 01:04:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:46,324 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:46,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:46,325 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:46,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:04:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:47,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:04:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:48,095 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 01:04:48,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:48,277 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 01:04:48,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1913599286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:48,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:48,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 01:04:48,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031517110] [2021-11-07 01:04:48,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:04:48,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:48,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:04:48,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:04:48,280 INFO L87 Difference]: Start difference. First operand 13626 states and 24585 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:49,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:49,020 INFO L93 Difference]: Finished difference Result 14166 states and 25480 transitions. [2021-11-07 01:04:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:04:49,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:04:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:49,044 INFO L225 Difference]: With dead ends: 14166 [2021-11-07 01:04:49,044 INFO L226 Difference]: Without dead ends: 13399 [2021-11-07 01:04:49,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 318 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 01:04:49,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13399 states. [2021-11-07 01:04:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13399 to 13132. [2021-11-07 01:04:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13132 states, 13126 states have (on average 1.809614505561481) internal successors, (23753), 13131 states have internal predecessors, (23753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13132 states to 13132 states and 23753 transitions. [2021-11-07 01:04:49,874 INFO L78 Accepts]: Start accepts. Automaton has 13132 states and 23753 transitions. Word has length 83 [2021-11-07 01:04:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:49,874 INFO L470 AbstractCegarLoop]: Abstraction has 13132 states and 23753 transitions. [2021-11-07 01:04:49,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 13132 states and 23753 transitions. [2021-11-07 01:04:49,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:04:49,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:49,884 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] [2021-11-07 01:04:49,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:50,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-07 01:04:50,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:50,285 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:50,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1983592103, now seen corresponding path program 1 times [2021-11-07 01:04:50,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:50,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569360415] [2021-11-07 01:04:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:50,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:50,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:50,289 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:50,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:04:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:51,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:51,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:51,647 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 01:04:51,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:51,888 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 01:04:51,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:51,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569360415] [2021-11-07 01:04:51,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569360415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:51,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2021532928] [2021-11-07 01:04:51,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:51,889 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:51,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:51,889 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:51,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:04:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:53,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:04:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:53,854 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 01:04:53,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:54,259 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 01:04:54,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2021532928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:54,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:54,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 22 [2021-11-07 01:04:54,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180559152] [2021-11-07 01:04:54,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:04:54,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:04:54,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:04:54,262 INFO L87 Difference]: Start difference. First operand 13132 states and 23753 transitions. Second operand has 16 states, 16 states have (on average 9.0) internal successors, (144), 16 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 01:05:09,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:09,295 INFO L93 Difference]: Finished difference Result 30290 states and 51297 transitions. [2021-11-07 01:05:09,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-07 01:05:09,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.0) internal successors, (144), 16 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 89 [2021-11-07 01:05:09,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:09,333 INFO L225 Difference]: With dead ends: 30290 [2021-11-07 01:05:09,334 INFO L226 Difference]: Without dead ends: 29762 [2021-11-07 01:05:09,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5311 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3264, Invalid=13248, Unknown=0, NotChecked=0, Total=16512 [2021-11-07 01:05:09,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29762 states. [2021-11-07 01:05:10,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29762 to 14252. [2021-11-07 01:05:10,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14252 states, 14246 states have (on average 1.7916608170714587) internal successors, (25524), 14251 states have internal predecessors, (25524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14252 states to 14252 states and 25524 transitions. [2021-11-07 01:05:10,333 INFO L78 Accepts]: Start accepts. Automaton has 14252 states and 25524 transitions. Word has length 89 [2021-11-07 01:05:10,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:10,333 INFO L470 AbstractCegarLoop]: Abstraction has 14252 states and 25524 transitions. [2021-11-07 01:05:10,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.0) internal successors, (144), 16 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 01:05:10,334 INFO L276 IsEmpty]: Start isEmpty. Operand 14252 states and 25524 transitions. [2021-11-07 01:05:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:05:10,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:10,341 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] [2021-11-07 01:05:10,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:10,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:10,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:10,742 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:10,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:10,742 INFO L85 PathProgramCache]: Analyzing trace with hash 494531575, now seen corresponding path program 1 times [2021-11-07 01:05:10,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:10,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418768060] [2021-11-07 01:05:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:10,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:10,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:10,744 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:10,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:05:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:11,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:12,127 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 01:05:12,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:12,384 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 01:05:12,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:12,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418768060] [2021-11-07 01:05:12,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418768060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:12,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1753715936] [2021-11-07 01:05:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:12,385 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:12,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:12,386 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:12,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:05:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:14,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:05:14,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:14,801 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 01:05:14,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:05:15,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1753715936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:15,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:05:15,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:05:15,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836806761] [2021-11-07 01:05:15,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:05:15,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:15,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:05:15,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:05:15,228 INFO L87 Difference]: Start difference. First operand 14252 states and 25524 transitions. Second operand has 18 states, 18 states have (on average 8.61111111111111) internal successors, (155), 17 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:41,911 INFO L93 Difference]: Finished difference Result 64159 states and 109939 transitions. [2021-11-07 01:05:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 01:05:41,912 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.61111111111111) internal successors, (155), 17 states have internal predecessors, (155), 0 states have call successors, (0), 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 90 [2021-11-07 01:05:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:42,002 INFO L225 Difference]: With dead ends: 64159 [2021-11-07 01:05:42,002 INFO L226 Difference]: Without dead ends: 62720 [2021-11-07 01:05:42,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1088, Invalid=3882, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 01:05:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62720 states. [2021-11-07 01:05:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62720 to 30074. [2021-11-07 01:05:44,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30074 states, 30068 states have (on average 1.7807636025009976) internal successors, (53544), 30073 states have internal predecessors, (53544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30074 states to 30074 states and 53544 transitions. [2021-11-07 01:05:44,766 INFO L78 Accepts]: Start accepts. Automaton has 30074 states and 53544 transitions. Word has length 90 [2021-11-07 01:05:44,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:44,766 INFO L470 AbstractCegarLoop]: Abstraction has 30074 states and 53544 transitions. [2021-11-07 01:05:44,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.61111111111111) internal successors, (155), 17 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 30074 states and 53544 transitions. [2021-11-07 01:05:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:05:44,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:44,783 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] [2021-11-07 01:05:44,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:45,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-07 01:05:45,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:45,185 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:45,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:45,186 INFO L85 PathProgramCache]: Analyzing trace with hash 54459727, now seen corresponding path program 1 times [2021-11-07 01:05:45,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:45,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052417842] [2021-11-07 01:05:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:45,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:45,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:45,187 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:45,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:05:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:46,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:46,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:46,697 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 01:05:46,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:46,981 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 01:05:46,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:46,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052417842] [2021-11-07 01:05:46,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052417842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:46,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1157076670] [2021-11-07 01:05:46,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:46,982 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:46,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:46,986 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:46,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 01:05:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:48,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:05:48,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:49,241 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 01:05:49,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:49,497 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 01:05:49,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1157076670] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:49,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:05:49,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:05:49,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052930413] [2021-11-07 01:05:49,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:05:49,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:49,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:05:49,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:05:49,500 INFO L87 Difference]: Start difference. First operand 30074 states and 53544 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:52,542 INFO L93 Difference]: Finished difference Result 36749 states and 64398 transitions. [2021-11-07 01:05:52,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:05:52,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 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 90 [2021-11-07 01:05:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:52,585 INFO L225 Difference]: With dead ends: 36749 [2021-11-07 01:05:52,585 INFO L226 Difference]: Without dead ends: 31860 [2021-11-07 01:05:52,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:05:52,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31860 states. [2021-11-07 01:05:55,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31860 to 29586. [2021-11-07 01:05:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29586 states, 29580 states have (on average 1.7861730899256254) internal successors, (52835), 29585 states have internal predecessors, (52835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29586 states to 29586 states and 52835 transitions. [2021-11-07 01:05:55,214 INFO L78 Accepts]: Start accepts. Automaton has 29586 states and 52835 transitions. Word has length 90 [2021-11-07 01:05:55,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:55,215 INFO L470 AbstractCegarLoop]: Abstraction has 29586 states and 52835 transitions. [2021-11-07 01:05:55,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 29586 states and 52835 transitions. [2021-11-07 01:05:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:05:55,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:55,236 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] [2021-11-07 01:05:55,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:55,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:55,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:55,650 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:55,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1482312938, now seen corresponding path program 1 times [2021-11-07 01:05:55,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:55,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459709122] [2021-11-07 01:05:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:55,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:55,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:55,652 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:55,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:05:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:56,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:57,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:57,190 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 01:05:57,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:57,407 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 01:05:57,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:57,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459709122] [2021-11-07 01:05:57,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459709122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:57,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1416934080] [2021-11-07 01:05:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:57,408 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:57,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:57,435 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:57,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 01:05:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:59,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:05:59,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:59,538 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 01:05:59,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:59,755 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 01:05:59,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1416934080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:59,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:05:59,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:05:59,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474489148] [2021-11-07 01:05:59,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:05:59,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:05:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:05:59,756 INFO L87 Difference]: Start difference. First operand 29586 states and 52835 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:02,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:02,479 INFO L93 Difference]: Finished difference Result 35652 states and 62598 transitions. [2021-11-07 01:06:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:06:02,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 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 91 [2021-11-07 01:06:02,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:02,525 INFO L225 Difference]: With dead ends: 35652 [2021-11-07 01:06:02,525 INFO L226 Difference]: Without dead ends: 31096 [2021-11-07 01:06:02,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:06:02,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31096 states. [2021-11-07 01:06:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31096 to 29358. [2021-11-07 01:06:04,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29358 states, 29352 states have (on average 1.785772690106296) internal successors, (52416), 29357 states have internal predecessors, (52416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29358 states to 29358 states and 52416 transitions. [2021-11-07 01:06:05,005 INFO L78 Accepts]: Start accepts. Automaton has 29358 states and 52416 transitions. Word has length 91 [2021-11-07 01:06:05,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:05,005 INFO L470 AbstractCegarLoop]: Abstraction has 29358 states and 52416 transitions. [2021-11-07 01:06:05,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:05,006 INFO L276 IsEmpty]: Start isEmpty. Operand 29358 states and 52416 transitions. [2021-11-07 01:06:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:06:05,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:05,036 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] [2021-11-07 01:06:05,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:05,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-07 01:06:05,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:06:05,450 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:06:05,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:05,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1308671036, now seen corresponding path program 1 times [2021-11-07 01:06:05,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:05,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10396065] [2021-11-07 01:06:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:05,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:05,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:05,452 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:05,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 01:06:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:06,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:06:06,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:07,122 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 01:06:07,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:07,414 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 01:06:07,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:07,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10396065] [2021-11-07 01:06:07,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10396065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:06:07,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2016322719] [2021-11-07 01:06:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:07,414 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:06:07,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:06:07,415 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:06:07,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-07 01:06:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:09,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:06:09,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:10,080 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 01:06:10,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:10,490 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 01:06:10,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2016322719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:10,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:06:10,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:06:10,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790767265] [2021-11-07 01:06:10,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:06:10,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:10,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:06:10,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:06:10,492 INFO L87 Difference]: Start difference. First operand 29358 states and 52416 transitions. Second operand has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:46,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:46,660 INFO L93 Difference]: Finished difference Result 103845 states and 178739 transitions. [2021-11-07 01:06:46,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 01:06:46,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 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 91 [2021-11-07 01:06:46,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:47,017 INFO L225 Difference]: With dead ends: 103845 [2021-11-07 01:06:47,017 INFO L226 Difference]: Without dead ends: 100212 [2021-11-07 01:06:47,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1088, Invalid=3882, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 01:06:47,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100212 states. [2021-11-07 01:06:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100212 to 59546. [2021-11-07 01:06:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59546 states, 59540 states have (on average 1.78199529727914) internal successors, (106100), 59545 states have internal predecessors, (106100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59546 states to 59546 states and 106100 transitions. [2021-11-07 01:06:54,528 INFO L78 Accepts]: Start accepts. Automaton has 59546 states and 106100 transitions. Word has length 91 [2021-11-07 01:06:54,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:54,529 INFO L470 AbstractCegarLoop]: Abstraction has 59546 states and 106100 transitions. [2021-11-07 01:06:54,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:54,529 INFO L276 IsEmpty]: Start isEmpty. Operand 59546 states and 106100 transitions. [2021-11-07 01:06:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:06:54,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:54,572 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] [2021-11-07 01:06:54,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:54,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:54,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:54,974 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:06:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:54,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1975179010, now seen corresponding path program 1 times [2021-11-07 01:06:54,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:54,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731682926] [2021-11-07 01:06:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:54,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:54,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:54,977 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:54,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-07 01:06:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:56,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:06:56,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:57,220 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 01:06:57,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:57,520 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 01:06:57,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:57,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731682926] [2021-11-07 01:06:57,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731682926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:06:57,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2024765206] [2021-11-07 01:06:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:57,521 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:06:57,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:06:57,522 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:06:57,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3afcba2c-0c21-4045-961a-3366e15fd064/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-07 01:07:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:00,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:07:00,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:00,799 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 01:07:00,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:01,180 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 01:07:01,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2024765206] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:01,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:07:01,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:07:01,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511134065] [2021-11-07 01:07:01,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:07:01,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:01,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:07:01,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:07:01,184 INFO L87 Difference]: Start difference. First operand 59546 states and 106100 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)