./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.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_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/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_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/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_868568ef-8384-484f-87f0-f6c5b41d76ca/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 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:59:10,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:59:10,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:59:11,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:59:11,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:59:11,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:59:11,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:59:11,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:59:11,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:59:11,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:59:11,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:59:11,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:59:11,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:59:11,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:59:11,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:59:11,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:59:11,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:59:11,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:59:11,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:59:11,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:59:11,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:59:11,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:59:11,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:59:11,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:59:11,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:59:11,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:59:11,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:59:11,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:59:11,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:59:11,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:59:11,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:59:11,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:59:11,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:59:11,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:59:11,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:59:11,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:59:11,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:59:11,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:59:11,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:59:11,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:59:11,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:59:11,140 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:59:11,184 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:59:11,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:59:11,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:59:11,186 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:59:11,186 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:59:11,187 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:59:11,187 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:59:11,187 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:59:11,187 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:59:11,188 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:59:11,189 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:59:11,189 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:59:11,190 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:59:11,190 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:59:11,190 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:59:11,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:59:11,191 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:59:11,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:59:11,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:59:11,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:59:11,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:59:11,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:59:11,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:59:11,193 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:59:11,194 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:59:11,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:59:11,194 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:59:11,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:59:11,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:59:11,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:59:11,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:59:11,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:59:11,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:59:11,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:59:11,198 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:59:11,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:59:11,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:59:11,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:59:11,199 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:59:11,199 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_868568ef-8384-484f-87f0-f6c5b41d76ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d [2021-11-07 00:59:11,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:59:11,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:59:11,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:59:11,570 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:59:11,571 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:59:11,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-07 00:59:11,652 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/data/b41e16e2a/50f8e747333a4922adb5d3822c112a4c/FLAGd8ccd6a72 [2021-11-07 00:59:12,421 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:59:12,422 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-07 00:59:12,456 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/data/b41e16e2a/50f8e747333a4922adb5d3822c112a4c/FLAGd8ccd6a72 [2021-11-07 00:59:12,597 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/data/b41e16e2a/50f8e747333a4922adb5d3822c112a4c [2021-11-07 00:59:12,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:59:12,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:59:12,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:59:12,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:59:12,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:59:12,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:59:12" (1/1) ... [2021-11-07 00:59:12,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad10fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:12, skipping insertion in model container [2021-11-07 00:59:12,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:59:12" (1/1) ... [2021-11-07 00:59:12,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:59:12,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:59:13,247 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_868568ef-8384-484f-87f0-f6c5b41d76ca/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-07 00:59:13,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:59:13,406 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 00:59:13,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@25029294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:13, skipping insertion in model container [2021-11-07 00:59:13,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:59:13,408 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:59:13,411 INFO L168 Benchmark]: Toolchain (without parser) took 807.42 ms. Allocated memory is still 104.9 MB. Free memory was 62.4 MB in the beginning and 65.5 MB in the end (delta: -3.2 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-11-07 00:59:13,413 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 104.9 MB. Free memory was 81.4 MB in the beginning and 81.3 MB in the end (delta: 55.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:59:13,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 786.64 ms. Allocated memory is still 104.9 MB. Free memory was 62.2 MB in the beginning and 65.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-11-07 00:59:13,418 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 104.9 MB. Free memory was 81.4 MB in the beginning and 81.3 MB in the end (delta: 55.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 786.64 ms. Allocated memory is still 104.9 MB. Free memory was 62.2 MB in the beginning and 65.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1668]: 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_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/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_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/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_868568ef-8384-484f-87f0-f6c5b41d76ca/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 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:59:15,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:59:15,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:59:15,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:59:15,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:59:15,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:59:15,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:59:15,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:59:15,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:59:15,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:59:15,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:59:15,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:59:15,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:59:15,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:59:15,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:59:15,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:59:15,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:59:15,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:59:15,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:59:15,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:59:15,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:59:15,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:59:15,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:59:15,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:59:15,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:59:15,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:59:15,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:59:15,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:59:15,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:59:15,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:59:15,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:59:15,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:59:15,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:59:15,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:59:15,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:59:15,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:59:15,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:59:15,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:59:15,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:59:15,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:59:15,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:59:15,910 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 00:59:15,954 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:59:15,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:59:15,956 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:59:15,956 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:59:15,957 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:59:15,957 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:59:15,957 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:59:15,957 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:59:15,957 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:59:15,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:59:15,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:59:15,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:59:15,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:59:15,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:59:15,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:59:15,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:59:15,961 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:59:15,962 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:59:15,962 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:59:15,962 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:59:15,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:59:15,962 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:59:15,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:59:15,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:59:15,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:59:15,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:59:15,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:59:15,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:59:15,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:59:15,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:59:15,964 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:59:15,964 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:15,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:59:15,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:59:15,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:59:15,966 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_868568ef-8384-484f-87f0-f6c5b41d76ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d [2021-11-07 00:59:16,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:59:16,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:59:16,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:59:16,412 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:59:16,412 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:59:16,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-07 00:59:16,478 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/data/a892c7be0/af41cdf51a344fb991be974f995cd8de/FLAGb10758c3e [2021-11-07 00:59:17,158 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:59:17,159 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-07 00:59:17,199 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/data/a892c7be0/af41cdf51a344fb991be974f995cd8de/FLAGb10758c3e [2021-11-07 00:59:17,323 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/data/a892c7be0/af41cdf51a344fb991be974f995cd8de [2021-11-07 00:59:17,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:59:17,326 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:59:17,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:59:17,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:59:17,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:59:17,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:59:17" (1/1) ... [2021-11-07 00:59:17,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26bce485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:17, skipping insertion in model container [2021-11-07 00:59:17,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:59:17" (1/1) ... [2021-11-07 00:59:17,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:59:17,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:59:17,903 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_868568ef-8384-484f-87f0-f6c5b41d76ca/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-07 00:59:18,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:59:18,054 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:59:18,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:59:18,173 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_868568ef-8384-484f-87f0-f6c5b41d76ca/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-07 00:59:18,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:59:18,248 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:59:18,336 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_868568ef-8384-484f-87f0-f6c5b41d76ca/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-07 00:59:18,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:59:18,426 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:59:18,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:18 WrapperNode [2021-11-07 00:59:18,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:59:18,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:59:18,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:59:18,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:59:18,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:18" (1/1) ... [2021-11-07 00:59:18,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:18" (1/1) ... [2021-11-07 00:59:18,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:59:18,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:59:18,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:59:18,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:59:18,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:18" (1/1) ... [2021-11-07 00:59:18,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:18" (1/1) ... [2021-11-07 00:59:18,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:18" (1/1) ... [2021-11-07 00:59:18,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:18" (1/1) ... [2021-11-07 00:59:19,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:18" (1/1) ... [2021-11-07 00:59:19,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:18" (1/1) ... [2021-11-07 00:59:19,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:18" (1/1) ... [2021-11-07 00:59:19,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:59:19,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:59:19,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:59:19,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:59:19,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:18" (1/1) ... [2021-11-07 00:59:19,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:59:19,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:59:19,479 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:59:19,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:59:19,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:59:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:59:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:59:19,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:59:34,018 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:59:34,018 INFO L299 CfgBuilder]: Removed 1113 assume(true) statements. [2021-11-07 00:59:34,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:59:34 BoogieIcfgContainer [2021-11-07 00:59:34,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:59:34,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:59:34,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:59:34,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:59:34,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:59:17" (1/3) ... [2021-11-07 00:59:34,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c67b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:59:34, skipping insertion in model container [2021-11-07 00:59:34,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:59:18" (2/3) ... [2021-11-07 00:59:34,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c67b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:59:34, skipping insertion in model container [2021-11-07 00:59:34,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:59:34" (3/3) ... [2021-11-07 00:59:34,034 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product20.cil.c [2021-11-07 00:59:34,040 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:59:34,040 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 00:59:34,111 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:59:34,118 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 00:59:34,118 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 00:59:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 4767 states, 4761 states have (on average 1.8886788489813064) internal successors, (8992), 4766 states have internal predecessors, (8992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 00:59:34,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:34,237 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] [2021-11-07 00:59:34,238 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash 120180799, now seen corresponding path program 1 times [2021-11-07 00:59:34,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:34,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292302909] [2021-11-07 00:59:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:34,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:34,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:34,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:34,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:59:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:34,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 00:59:34,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:34,762 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 00:59:34,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:34,830 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 00:59:34,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:34,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292302909] [2021-11-07 00:59:34,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292302909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:34,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:34,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:59:34,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920125798] [2021-11-07 00:59:34,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:59:34,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:34,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:59:34,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:59:34,886 INFO L87 Difference]: Start difference. First operand has 4767 states, 4761 states have (on average 1.8886788489813064) internal successors, (8992), 4766 states have internal predecessors, (8992), 0 states have call successors, (0), 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 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:35,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:35,079 INFO L93 Difference]: Finished difference Result 4786 states and 9015 transitions. [2021-11-07 00:59:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:59:35,081 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-07 00:59:35,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:35,142 INFO L225 Difference]: With dead ends: 4786 [2021-11-07 00:59:35,142 INFO L226 Difference]: Without dead ends: 4763 [2021-11-07 00:59:35,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 70 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 00:59:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2021-11-07 00:59:35,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 4763. [2021-11-07 00:59:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4758 states have (on average 1.8873476250525432) internal successors, (8980), 4762 states have internal predecessors, (8980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 8980 transitions. [2021-11-07 00:59:35,405 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 8980 transitions. Word has length 36 [2021-11-07 00:59:35,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:35,405 INFO L470 AbstractCegarLoop]: Abstraction has 4763 states and 8980 transitions. [2021-11-07 00:59:35,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 8980 transitions. [2021-11-07 00:59:35,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 00:59:35,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:35,415 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] [2021-11-07 00:59:35,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:35,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:35,629 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:35,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:35,630 INFO L85 PathProgramCache]: Analyzing trace with hash -812482130, now seen corresponding path program 1 times [2021-11-07 00:59:35,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:35,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645266316] [2021-11-07 00:59:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:35,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:35,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:35,634 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:35,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:59:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:35,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:59:35,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:36,101 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 00:59:36,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:36,237 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 00:59:36,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:36,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645266316] [2021-11-07 00:59:36,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645266316] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:36,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:36,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:59:36,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524973300] [2021-11-07 00:59:36,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:36,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:36,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:36,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:36,242 INFO L87 Difference]: Start difference. First operand 4763 states and 8980 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:36,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:36,984 INFO L93 Difference]: Finished difference Result 14209 states and 26797 transitions. [2021-11-07 00:59:36,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:59:36,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 00:59:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:37,049 INFO L225 Difference]: With dead ends: 14209 [2021-11-07 00:59:37,049 INFO L226 Difference]: Without dead ends: 9459 [2021-11-07 00:59:37,060 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 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 00:59:37,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9459 states. [2021-11-07 00:59:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9459 to 4763. [2021-11-07 00:59:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4758 states have (on average 1.885876418663304) internal successors, (8973), 4762 states have internal predecessors, (8973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 8973 transitions. [2021-11-07 00:59:37,306 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 8973 transitions. Word has length 38 [2021-11-07 00:59:37,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:37,307 INFO L470 AbstractCegarLoop]: Abstraction has 4763 states and 8973 transitions. [2021-11-07 00:59:37,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 8973 transitions. [2021-11-07 00:59:37,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 00:59:37,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:37,309 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:37,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 00:59:37,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:37,527 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:37,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash -733664911, now seen corresponding path program 1 times [2021-11-07 00:59:37,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:37,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746039943] [2021-11-07 00:59:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:37,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:37,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:37,530 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:37,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:59:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:37,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:59:37,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:38,062 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 00:59:38,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:38,206 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 00:59:38,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:38,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746039943] [2021-11-07 00:59:38,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746039943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:38,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:38,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:59:38,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595111048] [2021-11-07 00:59:38,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:59:38,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:59:38,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:59:38,209 INFO L87 Difference]: Start difference. First operand 4763 states and 8973 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:40,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:40,215 INFO L93 Difference]: Finished difference Result 32816 states and 61863 transitions. [2021-11-07 00:59:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 00:59:40,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 00:59:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:40,377 INFO L225 Difference]: With dead ends: 32816 [2021-11-07 00:59:40,378 INFO L226 Difference]: Without dead ends: 28075 [2021-11-07 00:59:40,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:59:40,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28075 states. [2021-11-07 00:59:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28075 to 4741. [2021-11-07 00:59:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4741 states, 4736 states have (on average 1.8838682432432432) internal successors, (8922), 4740 states have internal predecessors, (8922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4741 states to 4741 states and 8922 transitions. [2021-11-07 00:59:40,953 INFO L78 Accepts]: Start accepts. Automaton has 4741 states and 8922 transitions. Word has length 44 [2021-11-07 00:59:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:40,953 INFO L470 AbstractCegarLoop]: Abstraction has 4741 states and 8922 transitions. [2021-11-07 00:59:40,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4741 states and 8922 transitions. [2021-11-07 00:59:40,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 00:59:40,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:40,956 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:40,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:41,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:41,172 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:41,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:41,174 INFO L85 PathProgramCache]: Analyzing trace with hash 810670128, now seen corresponding path program 1 times [2021-11-07 00:59:41,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:41,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185162996] [2021-11-07 00:59:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:41,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:41,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:41,178 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:41,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:59:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:41,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:59:41,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:41,752 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 00:59:41,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:41,883 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 00:59:41,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:41,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185162996] [2021-11-07 00:59:41,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185162996] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:41,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:41,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:59:41,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317577112] [2021-11-07 00:59:41,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:41,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:41,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:41,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:41,888 INFO L87 Difference]: Start difference. First operand 4741 states and 8922 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:42,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:42,513 INFO L93 Difference]: Finished difference Result 14120 states and 26601 transitions. [2021-11-07 00:59:42,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:59:42,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 00:59:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:42,541 INFO L225 Difference]: With dead ends: 14120 [2021-11-07 00:59:42,541 INFO L226 Difference]: Without dead ends: 9401 [2021-11-07 00:59:42,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:42,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9401 states. [2021-11-07 00:59:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9401 to 4741. [2021-11-07 00:59:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4741 states, 4736 states have (on average 1.8815456081081081) internal successors, (8911), 4740 states have internal predecessors, (8911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4741 states to 4741 states and 8911 transitions. [2021-11-07 00:59:42,964 INFO L78 Accepts]: Start accepts. Automaton has 4741 states and 8911 transitions. Word has length 46 [2021-11-07 00:59:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:42,964 INFO L470 AbstractCegarLoop]: Abstraction has 4741 states and 8911 transitions. [2021-11-07 00:59:42,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4741 states and 8911 transitions. [2021-11-07 00:59:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 00:59:42,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:42,966 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 00:59:42,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:43,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:43,182 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:43,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:43,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1242331333, now seen corresponding path program 1 times [2021-11-07 00:59:43,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:43,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691604030] [2021-11-07 00:59:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:43,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:43,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:43,185 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:43,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:59:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:43,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 00:59:43,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:43,793 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 00:59:43,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:43,967 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 00:59:43,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:43,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691604030] [2021-11-07 00:59:43,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691604030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:43,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:43,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:59:43,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846458675] [2021-11-07 00:59:43,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:59:43,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:59:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:59:43,975 INFO L87 Difference]: Start difference. First operand 4741 states and 8911 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:48,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:48,030 INFO L93 Difference]: Finished difference Result 51395 states and 96855 transitions. [2021-11-07 00:59:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:59:48,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 00:59:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:48,218 INFO L225 Difference]: With dead ends: 51395 [2021-11-07 00:59:48,218 INFO L226 Difference]: Without dead ends: 46679 [2021-11-07 00:59:48,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 00:59:48,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46679 states. [2021-11-07 00:59:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46679 to 4743. [2021-11-07 00:59:48,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4738 states have (on average 1.880118193330519) internal successors, (8908), 4742 states have internal predecessors, (8908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 8908 transitions. [2021-11-07 00:59:48,786 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 8908 transitions. Word has length 52 [2021-11-07 00:59:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:48,786 INFO L470 AbstractCegarLoop]: Abstraction has 4743 states and 8908 transitions. [2021-11-07 00:59:48,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 8908 transitions. [2021-11-07 00:59:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 00:59:48,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:48,790 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 00:59:48,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:49,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:49,004 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:49,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1253895560, now seen corresponding path program 1 times [2021-11-07 00:59:49,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:49,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055551351] [2021-11-07 00:59:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:49,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:49,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:49,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:49,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:59:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:49,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:59:49,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:49,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:49,867 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 00:59:49,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:49,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055551351] [2021-11-07 00:59:49,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055551351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:49,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:49,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:59:49,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765419141] [2021-11-07 00:59:49,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:59:49,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:49,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:59:49,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:59:49,870 INFO L87 Difference]: Start difference. First operand 4743 states and 8908 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:53,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:53,010 INFO L93 Difference]: Finished difference Result 51363 states and 96776 transitions. [2021-11-07 00:59:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:59:53,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 00:59:53,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:53,158 INFO L225 Difference]: With dead ends: 51363 [2021-11-07 00:59:53,159 INFO L226 Difference]: Without dead ends: 46647 [2021-11-07 00:59:53,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 00:59:53,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46647 states. [2021-11-07 00:59:53,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46647 to 4747. [2021-11-07 00:59:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4747 states, 4742 states have (on average 1.8791649093209617) internal successors, (8911), 4746 states have internal predecessors, (8911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:53,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4747 states to 4747 states and 8911 transitions. [2021-11-07 00:59:53,982 INFO L78 Accepts]: Start accepts. Automaton has 4747 states and 8911 transitions. Word has length 54 [2021-11-07 00:59:53,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:53,982 INFO L470 AbstractCegarLoop]: Abstraction has 4747 states and 8911 transitions. [2021-11-07 00:59:53,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 4747 states and 8911 transitions. [2021-11-07 00:59:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 00:59:53,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:53,984 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 00:59:54,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:54,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:54,197 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:54,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1866497349, now seen corresponding path program 1 times [2021-11-07 00:59:54,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:54,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769610537] [2021-11-07 00:59:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:54,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:54,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:54,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:54,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:59:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:59:54,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:54,803 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 00:59:54,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:54,938 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 00:59:54,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:54,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769610537] [2021-11-07 00:59:54,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769610537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:54,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:54,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:59:54,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108990586] [2021-11-07 00:59:54,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:54,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:54,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:54,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:54,941 INFO L87 Difference]: Start difference. First operand 4747 states and 8911 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 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 00:59:55,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:55,232 INFO L93 Difference]: Finished difference Result 9442 states and 17753 transitions. [2021-11-07 00:59:55,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:59:55,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 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 56 [2021-11-07 00:59:55,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:55,245 INFO L225 Difference]: With dead ends: 9442 [2021-11-07 00:59:55,246 INFO L226 Difference]: Without dead ends: 4726 [2021-11-07 00:59:55,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 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 00:59:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2021-11-07 00:59:55,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 4726. [2021-11-07 00:59:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4726 states, 4721 states have (on average 1.8794746875661936) internal successors, (8873), 4725 states have internal predecessors, (8873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4726 states to 4726 states and 8873 transitions. [2021-11-07 00:59:55,518 INFO L78 Accepts]: Start accepts. Automaton has 4726 states and 8873 transitions. Word has length 56 [2021-11-07 00:59:55,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:55,521 INFO L470 AbstractCegarLoop]: Abstraction has 4726 states and 8873 transitions. [2021-11-07 00:59:55,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 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 00:59:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 4726 states and 8873 transitions. [2021-11-07 00:59:55,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 00:59:55,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:55,523 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:55,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:55,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:55,742 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:55,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:55,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1123537053, now seen corresponding path program 1 times [2021-11-07 00:59:55,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:55,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500637864] [2021-11-07 00:59:55,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:55,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:55,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:55,747 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:55,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:59:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:56,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:59:56,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:56,376 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 00:59:56,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:56,533 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 00:59:56,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:56,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500637864] [2021-11-07 00:59:56,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500637864] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:56,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:56,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:59:56,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37496909] [2021-11-07 00:59:56,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:59:56,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:56,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:59:56,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:59:56,542 INFO L87 Difference]: Start difference. First operand 4726 states and 8873 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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 00:59:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:56,949 INFO L93 Difference]: Finished difference Result 9386 states and 17656 transitions. [2021-11-07 00:59:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:59:56,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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 57 [2021-11-07 00:59:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:56,962 INFO L225 Difference]: With dead ends: 9386 [2021-11-07 00:59:56,963 INFO L226 Difference]: Without dead ends: 4701 [2021-11-07 00:59:56,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:59:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2021-11-07 00:59:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 4701. [2021-11-07 00:59:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4701 states, 4696 states have (on average 1.8801107325383304) internal successors, (8829), 4700 states have internal predecessors, (8829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:57,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4701 states to 4701 states and 8829 transitions. [2021-11-07 00:59:57,244 INFO L78 Accepts]: Start accepts. Automaton has 4701 states and 8829 transitions. Word has length 57 [2021-11-07 00:59:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:57,244 INFO L470 AbstractCegarLoop]: Abstraction has 4701 states and 8829 transitions. [2021-11-07 00:59:57,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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 00:59:57,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4701 states and 8829 transitions. [2021-11-07 00:59:57,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 00:59:57,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:57,246 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:57,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:57,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:57,469 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:57,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:57,469 INFO L85 PathProgramCache]: Analyzing trace with hash 479309484, now seen corresponding path program 1 times [2021-11-07 00:59:57,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:57,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801899425] [2021-11-07 00:59:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:57,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:57,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:57,472 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:57,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:59:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:57,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:59:57,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:58,147 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 00:59:58,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:58,284 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 00:59:58,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:58,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801899425] [2021-11-07 00:59:58,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801899425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:58,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:58,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:59:58,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488601899] [2021-11-07 00:59:58,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:58,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:58,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:58,286 INFO L87 Difference]: Start difference. First operand 4701 states and 8829 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:58,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:58,485 INFO L93 Difference]: Finished difference Result 9361 states and 17612 transitions. [2021-11-07 00:59:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:59:58,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 00:59:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:58,492 INFO L225 Difference]: With dead ends: 9361 [2021-11-07 00:59:58,492 INFO L226 Difference]: Without dead ends: 4698 [2021-11-07 00:59:58,499 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 00:59:58,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2021-11-07 00:59:58,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 4698. [2021-11-07 00:59:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 4693 states have (on average 1.8796079266993395) internal successors, (8821), 4697 states have internal predecessors, (8821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 8821 transitions. [2021-11-07 00:59:58,727 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 8821 transitions. Word has length 58 [2021-11-07 00:59:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:58,727 INFO L470 AbstractCegarLoop]: Abstraction has 4698 states and 8821 transitions. [2021-11-07 00:59:58,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 8821 transitions. [2021-11-07 00:59:58,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 00:59:58,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:58,729 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:58,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:58,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:58,952 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:58,953 INFO L85 PathProgramCache]: Analyzing trace with hash -999754595, now seen corresponding path program 1 times [2021-11-07 00:59:58,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:58,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628741927] [2021-11-07 00:59:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:58,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:58,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:58,956 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:58,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 00:59:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:59,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 00:59:59,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:59,598 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 00:59:59,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:59,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:59,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628741927] [2021-11-07 00:59:59,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628741927] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:59,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:59,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:59:59,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604116564] [2021-11-07 00:59:59,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:59:59,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:59,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:59:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:59:59,734 INFO L87 Difference]: Start difference. First operand 4698 states and 8821 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 01:00:00,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:00,141 INFO L93 Difference]: Finished difference Result 9352 states and 17594 transitions. [2021-11-07 01:00:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:00:00,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 59 [2021-11-07 01:00:00,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:00,148 INFO L225 Difference]: With dead ends: 9352 [2021-11-07 01:00:00,148 INFO L226 Difference]: Without dead ends: 4696 [2021-11-07 01:00:00,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:00:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4696 states. [2021-11-07 01:00:00,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4696 to 4696. [2021-11-07 01:00:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4696 states, 4691 states have (on average 1.8791302494137712) internal successors, (8815), 4695 states have internal predecessors, (8815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4696 states to 4696 states and 8815 transitions. [2021-11-07 01:00:00,505 INFO L78 Accepts]: Start accepts. Automaton has 4696 states and 8815 transitions. Word has length 59 [2021-11-07 01:00:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:00,507 INFO L470 AbstractCegarLoop]: Abstraction has 4696 states and 8815 transitions. [2021-11-07 01:00:00,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 01:00:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 4696 states and 8815 transitions. [2021-11-07 01:00:00,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:00:00,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:00,509 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:00,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:00,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:00,723 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:00,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:00,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1314151215, now seen corresponding path program 1 times [2021-11-07 01:00:00,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:00,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285748297] [2021-11-07 01:00:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:00,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:00,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:00,725 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:00,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:00:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:01,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:00:01,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:01,395 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 01:00:01,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:01,552 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 01:00:01,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:01,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285748297] [2021-11-07 01:00:01,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285748297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:01,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:01,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:00:01,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096264464] [2021-11-07 01:00:01,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:00:01,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:00:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:00:01,555 INFO L87 Difference]: Start difference. First operand 4696 states and 8815 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 01:00:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:01,914 INFO L93 Difference]: Finished difference Result 9345 states and 17579 transitions. [2021-11-07 01:00:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:00:01,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 60 [2021-11-07 01:00:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:01,922 INFO L225 Difference]: With dead ends: 9345 [2021-11-07 01:00:01,922 INFO L226 Difference]: Without dead ends: 4694 [2021-11-07 01:00:01,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:00:01,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4694 states. [2021-11-07 01:00:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4694 to 4694. [2021-11-07 01:00:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 4689 states have (on average 1.8786521646406484) internal successors, (8809), 4693 states have internal predecessors, (8809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 8809 transitions. [2021-11-07 01:00:02,167 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 8809 transitions. Word has length 60 [2021-11-07 01:00:02,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:02,167 INFO L470 AbstractCegarLoop]: Abstraction has 4694 states and 8809 transitions. [2021-11-07 01:00:02,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 01:00:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 8809 transitions. [2021-11-07 01:00:02,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:00:02,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:02,168 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:02,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:02,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:02,369 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1263226962, now seen corresponding path program 1 times [2021-11-07 01:00:02,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:02,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923244480] [2021-11-07 01:00:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:02,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:02,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:02,371 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:02,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:00:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:02,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:00:02,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:03,360 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 01:00:03,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:03,603 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 01:00:03,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:03,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923244480] [2021-11-07 01:00:03,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923244480] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:03,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:03,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:00:03,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164368028] [2021-11-07 01:00:03,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:00:03,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:03,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:00:03,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:00:03,606 INFO L87 Difference]: Start difference. First operand 4694 states and 8809 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:04,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:04,621 INFO L93 Difference]: Finished difference Result 13000 states and 24474 transitions. [2021-11-07 01:00:04,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:00:04,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:00:04,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:04,637 INFO L225 Difference]: With dead ends: 13000 [2021-11-07 01:00:04,638 INFO L226 Difference]: Without dead ends: 10621 [2021-11-07 01:00:04,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:00:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10621 states. [2021-11-07 01:00:05,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10621 to 6300. [2021-11-07 01:00:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6300 states, 6295 states have (on average 1.8811755361397935) internal successors, (11842), 6299 states have internal predecessors, (11842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 11842 transitions. [2021-11-07 01:00:05,049 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 11842 transitions. Word has length 61 [2021-11-07 01:00:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:05,050 INFO L470 AbstractCegarLoop]: Abstraction has 6300 states and 11842 transitions. [2021-11-07 01:00:05,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 11842 transitions. [2021-11-07 01:00:05,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:00:05,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:05,056 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:05,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:05,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:05,270 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:05,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1157513391, now seen corresponding path program 1 times [2021-11-07 01:00:05,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:05,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082865162] [2021-11-07 01:00:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:05,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:05,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:05,273 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:05,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:00:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:05,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:00:05,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:06,062 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 01:00:06,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:06,304 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 01:00:06,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:06,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082865162] [2021-11-07 01:00:06,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082865162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:06,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:06,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:00:06,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588113699] [2021-11-07 01:00:06,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:00:06,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:06,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:00:06,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:00:06,307 INFO L87 Difference]: Start difference. First operand 6300 states and 11842 transitions. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:07,009 INFO L93 Difference]: Finished difference Result 12024 states and 22406 transitions. [2021-11-07 01:00:07,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:00:07,009 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 01:00:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:07,018 INFO L225 Difference]: With dead ends: 12024 [2021-11-07 01:00:07,019 INFO L226 Difference]: Without dead ends: 6905 [2021-11-07 01:00:07,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:00:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6905 states. [2021-11-07 01:00:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6905 to 4673. [2021-11-07 01:00:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4668 states have (on average 1.8723221936589547) internal successors, (8740), 4672 states have internal predecessors, (8740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 8740 transitions. [2021-11-07 01:00:07,248 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 8740 transitions. Word has length 80 [2021-11-07 01:00:07,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:07,248 INFO L470 AbstractCegarLoop]: Abstraction has 4673 states and 8740 transitions. [2021-11-07 01:00:07,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:07,248 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 8740 transitions. [2021-11-07 01:00:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:00:07,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:07,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:07,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:07,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:07,451 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:07,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1737547905, now seen corresponding path program 1 times [2021-11-07 01:00:07,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:07,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791541785] [2021-11-07 01:00:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:07,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:07,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:07,454 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:07,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:00:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:08,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:00:08,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:08,320 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 01:00:08,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:08,552 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 01:00:08,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:08,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791541785] [2021-11-07 01:00:08,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791541785] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:08,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:08,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:00:08,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775256533] [2021-11-07 01:00:08,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:00:08,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:00:08,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:00:08,555 INFO L87 Difference]: Start difference. First operand 4673 states and 8740 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:10,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:10,691 INFO L93 Difference]: Finished difference Result 17261 states and 32392 transitions. [2021-11-07 01:00:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:00:10,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:00:10,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:10,711 INFO L225 Difference]: With dead ends: 17261 [2021-11-07 01:00:10,711 INFO L226 Difference]: Without dead ends: 12642 [2021-11-07 01:00:10,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 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 01:00:10,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12642 states. [2021-11-07 01:00:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12642 to 4673. [2021-11-07 01:00:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4668 states have (on average 1.835904027420737) internal successors, (8570), 4672 states have internal predecessors, (8570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 8570 transitions. [2021-11-07 01:00:11,004 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 8570 transitions. Word has length 81 [2021-11-07 01:00:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:11,005 INFO L470 AbstractCegarLoop]: Abstraction has 4673 states and 8570 transitions. [2021-11-07 01:00:11,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 8570 transitions. [2021-11-07 01:00:11,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:00:11,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:11,009 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:11,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:00:11,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:11,225 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:11,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:11,225 INFO L85 PathProgramCache]: Analyzing trace with hash 146436845, now seen corresponding path program 1 times [2021-11-07 01:00:11,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:11,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471738112] [2021-11-07 01:00:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:11,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:11,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:11,228 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:11,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:00:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:11,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:00:11,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:12,094 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 01:00:12,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:12,332 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 01:00:12,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:12,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471738112] [2021-11-07 01:00:12,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471738112] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:12,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:12,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:00:12,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514956934] [2021-11-07 01:00:12,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:00:12,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:12,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:00:12,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:00:12,334 INFO L87 Difference]: Start difference. First operand 4673 states and 8570 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:13,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:13,752 INFO L93 Difference]: Finished difference Result 13200 states and 24429 transitions. [2021-11-07 01:00:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:00:13,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 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 01:00:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:13,764 INFO L225 Difference]: With dead ends: 13200 [2021-11-07 01:00:13,764 INFO L226 Difference]: Without dead ends: 8599 [2021-11-07 01:00:13,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:00:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8599 states. [2021-11-07 01:00:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8599 to 4605. [2021-11-07 01:00:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4600 states have (on average 1.836086956521739) internal successors, (8446), 4604 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 8446 transitions. [2021-11-07 01:00:14,033 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 8446 transitions. Word has length 89 [2021-11-07 01:00:14,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:14,034 INFO L470 AbstractCegarLoop]: Abstraction has 4605 states and 8446 transitions. [2021-11-07 01:00:14,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:14,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 8446 transitions. [2021-11-07 01:00:14,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:00:14,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:14,037 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:14,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:14,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:14,238 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:14,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1245971405, now seen corresponding path program 1 times [2021-11-07 01:00:14,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:14,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653820216] [2021-11-07 01:00:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:14,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:14,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:14,240 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:14,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:00:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:14,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:00:14,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:15,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:15,449 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 01:00:15,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:15,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653820216] [2021-11-07 01:00:15,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653820216] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:15,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:15,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:00:15,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659157799] [2021-11-07 01:00:15,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:00:15,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:00:15,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:00:15,451 INFO L87 Difference]: Start difference. First operand 4605 states and 8446 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:17,832 INFO L93 Difference]: Finished difference Result 18222 states and 33634 transitions. [2021-11-07 01:00:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:00:17,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 01:00:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:17,852 INFO L225 Difference]: With dead ends: 18222 [2021-11-07 01:00:17,852 INFO L226 Difference]: Without dead ends: 13688 [2021-11-07 01:00:17,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:00:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13688 states. [2021-11-07 01:00:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13688 to 4613. [2021-11-07 01:00:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4608 states have (on average 1.8346354166666667) internal successors, (8454), 4612 states have internal predecessors, (8454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 8454 transitions. [2021-11-07 01:00:18,178 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 8454 transitions. Word has length 91 [2021-11-07 01:00:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:18,178 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 8454 transitions. [2021-11-07 01:00:18,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 8454 transitions. [2021-11-07 01:00:18,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:00:18,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:18,183 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:18,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:18,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:18,397 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:18,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:18,398 INFO L85 PathProgramCache]: Analyzing trace with hash 996695726, now seen corresponding path program 1 times [2021-11-07 01:00:18,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:18,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919253348] [2021-11-07 01:00:18,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:18,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:18,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:18,399 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:18,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:00:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:19,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:00:19,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:19,309 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 01:00:19,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:19,525 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 01:00:19,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:19,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919253348] [2021-11-07 01:00:19,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919253348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:19,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:19,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:00:19,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501716531] [2021-11-07 01:00:19,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:00:19,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:19,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:00:19,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:00:19,527 INFO L87 Difference]: Start difference. First operand 4613 states and 8454 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:28,744 INFO L93 Difference]: Finished difference Result 12076 states and 22119 transitions. [2021-11-07 01:00:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:00:28,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 01:00:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:28,757 INFO L225 Difference]: With dead ends: 12076 [2021-11-07 01:00:28,757 INFO L226 Difference]: Without dead ends: 8809 [2021-11-07 01:00:28,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:00:28,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8809 states. [2021-11-07 01:00:29,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8809 to 8617. [2021-11-07 01:00:29,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8617 states, 8612 states have (on average 1.841848583372039) internal successors, (15862), 8616 states have internal predecessors, (15862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:29,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8617 states to 8617 states and 15862 transitions. [2021-11-07 01:00:29,286 INFO L78 Accepts]: Start accepts. Automaton has 8617 states and 15862 transitions. Word has length 92 [2021-11-07 01:00:29,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:29,287 INFO L470 AbstractCegarLoop]: Abstraction has 8617 states and 15862 transitions. [2021-11-07 01:00:29,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:29,287 INFO L276 IsEmpty]: Start isEmpty. Operand 8617 states and 15862 transitions. [2021-11-07 01:00:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:00:29,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:29,292 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:29,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:29,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:29,505 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:29,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:29,506 INFO L85 PathProgramCache]: Analyzing trace with hash -14421524, now seen corresponding path program 1 times [2021-11-07 01:00:29,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:29,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706445117] [2021-11-07 01:00:29,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:29,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:29,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:29,507 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:29,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:00:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:30,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:00:30,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:30,502 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 01:00:30,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:30,746 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 01:00:30,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:30,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706445117] [2021-11-07 01:00:30,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706445117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:30,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:30,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:00:30,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284983631] [2021-11-07 01:00:30,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:00:30,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:30,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:00:30,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:00:30,749 INFO L87 Difference]: Start difference. First operand 8617 states and 15862 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:33,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:33,172 INFO L93 Difference]: Finished difference Result 16275 states and 29867 transitions. [2021-11-07 01:00:33,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:00:33,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 01:00:33,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:33,185 INFO L225 Difference]: With dead ends: 16275 [2021-11-07 01:00:33,185 INFO L226 Difference]: Without dead ends: 9007 [2021-11-07 01:00:33,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 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 01:00:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9007 states. [2021-11-07 01:00:33,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9007 to 8552. [2021-11-07 01:00:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8552 states, 8547 states have (on average 1.83011583011583) internal successors, (15642), 8551 states have internal predecessors, (15642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:33,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8552 states to 8552 states and 15642 transitions. [2021-11-07 01:00:33,697 INFO L78 Accepts]: Start accepts. Automaton has 8552 states and 15642 transitions. Word has length 92 [2021-11-07 01:00:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:33,697 INFO L470 AbstractCegarLoop]: Abstraction has 8552 states and 15642 transitions. [2021-11-07 01:00:33,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 8552 states and 15642 transitions. [2021-11-07 01:00:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:00:33,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:33,701 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:33,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-07 01:00:33,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:33,934 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:33,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:33,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1401275252, now seen corresponding path program 1 times [2021-11-07 01:00:33,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:33,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519230556] [2021-11-07 01:00:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:33,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:33,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:33,936 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:33,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:00:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:34,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:00:34,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:35,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:35,312 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 01:00:35,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:35,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519230556] [2021-11-07 01:00:35,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519230556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:35,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:35,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:00:35,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407521502] [2021-11-07 01:00:35,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:00:35,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:35,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:00:35,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:00:35,315 INFO L87 Difference]: Start difference. First operand 8552 states and 15642 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:36,808 INFO L93 Difference]: Finished difference Result 17622 states and 32223 transitions. [2021-11-07 01:00:36,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:00:36,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 01:00:36,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:36,824 INFO L225 Difference]: With dead ends: 17622 [2021-11-07 01:00:36,824 INFO L226 Difference]: Without dead ends: 11656 [2021-11-07 01:00:36,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:00:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11656 states. [2021-11-07 01:00:37,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11656 to 8539. [2021-11-07 01:00:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8539 states, 8534 states have (on average 1.829857042418561) internal successors, (15616), 8538 states have internal predecessors, (15616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:37,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8539 states to 8539 states and 15616 transitions. [2021-11-07 01:00:37,447 INFO L78 Accepts]: Start accepts. Automaton has 8539 states and 15616 transitions. Word has length 94 [2021-11-07 01:00:37,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:37,447 INFO L470 AbstractCegarLoop]: Abstraction has 8539 states and 15616 transitions. [2021-11-07 01:00:37,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:37,447 INFO L276 IsEmpty]: Start isEmpty. Operand 8539 states and 15616 transitions. [2021-11-07 01:00:37,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:00:37,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:37,450 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:37,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:37,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:37,652 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:37,653 INFO L85 PathProgramCache]: Analyzing trace with hash 919631418, now seen corresponding path program 1 times [2021-11-07 01:00:37,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:37,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571515084] [2021-11-07 01:00:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:37,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:37,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:37,654 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:37,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:00:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:38,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:00:38,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:38,788 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 01:00:38,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:39,090 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 01:00:39,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:39,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571515084] [2021-11-07 01:00:39,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571515084] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:39,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:39,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:00:39,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536147551] [2021-11-07 01:00:39,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:00:39,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:39,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:00:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:00:39,092 INFO L87 Difference]: Start difference. First operand 8539 states and 15616 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:41,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:41,219 INFO L93 Difference]: Finished difference Result 39877 states and 73630 transitions. [2021-11-07 01:00:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:00:41,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 01:00:41,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:41,273 INFO L225 Difference]: With dead ends: 39877 [2021-11-07 01:00:41,273 INFO L226 Difference]: Without dead ends: 33921 [2021-11-07 01:00:41,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:00:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33921 states. [2021-11-07 01:00:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33921 to 14151. [2021-11-07 01:00:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14146 states have (on average 1.833027004100099) internal successors, (25930), 14150 states have internal predecessors, (25930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 25930 transitions. [2021-11-07 01:00:42,355 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 25930 transitions. Word has length 96 [2021-11-07 01:00:42,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:42,355 INFO L470 AbstractCegarLoop]: Abstraction has 14151 states and 25930 transitions. [2021-11-07 01:00:42,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:42,356 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 25930 transitions. [2021-11-07 01:00:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:00:42,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:42,358 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:00:42,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:42,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:42,573 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:42,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:42,574 INFO L85 PathProgramCache]: Analyzing trace with hash 300609294, now seen corresponding path program 1 times [2021-11-07 01:00:42,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:42,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093225884] [2021-11-07 01:00:42,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:42,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:42,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:42,576 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:42,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:00:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:43,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:00:43,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:43,766 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 01:00:43,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:44,146 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 01:00:44,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:44,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093225884] [2021-11-07 01:00:44,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093225884] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:44,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:44,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:00:44,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774699376] [2021-11-07 01:00:44,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:00:44,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:44,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:00:44,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:00:44,148 INFO L87 Difference]: Start difference. First operand 14151 states and 25930 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:50,423 INFO L93 Difference]: Finished difference Result 87055 states and 160856 transitions. [2021-11-07 01:00:50,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:00:50,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 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 98 [2021-11-07 01:00:50,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:50,528 INFO L225 Difference]: With dead ends: 87055 [2021-11-07 01:00:50,528 INFO L226 Difference]: Without dead ends: 75487 [2021-11-07 01:00:50,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:00:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75487 states. [2021-11-07 01:00:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75487 to 24236. [2021-11-07 01:00:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24236 states, 24231 states have (on average 1.8419792827369899) internal successors, (44633), 24235 states have internal predecessors, (44633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24236 states to 24236 states and 44633 transitions. [2021-11-07 01:00:52,480 INFO L78 Accepts]: Start accepts. Automaton has 24236 states and 44633 transitions. Word has length 98 [2021-11-07 01:00:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:52,481 INFO L470 AbstractCegarLoop]: Abstraction has 24236 states and 44633 transitions. [2021-11-07 01:00:52,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 24236 states and 44633 transitions. [2021-11-07 01:00:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:00:52,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:52,484 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:00:52,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:52,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:52,702 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:52,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:52,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1186938113, now seen corresponding path program 1 times [2021-11-07 01:00:52,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:52,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592448063] [2021-11-07 01:00:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:52,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:52,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:52,706 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:52,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:00:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:53,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:00:53,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:53,889 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 01:00:53,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:54,092 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 01:00:54,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:54,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592448063] [2021-11-07 01:00:54,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592448063] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:54,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:54,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:00:54,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523542031] [2021-11-07 01:00:54,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:00:54,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:54,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:00:54,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:00:54,096 INFO L87 Difference]: Start difference. First operand 24236 states and 44633 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:55,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:00:55,800 INFO L93 Difference]: Finished difference Result 45982 states and 84658 transitions. [2021-11-07 01:00:55,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:00:55,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-07 01:00:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:00:55,831 INFO L225 Difference]: With dead ends: 45982 [2021-11-07 01:00:55,831 INFO L226 Difference]: Without dead ends: 24251 [2021-11-07 01:00:55,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:00:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24251 states. [2021-11-07 01:00:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24251 to 24236. [2021-11-07 01:00:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24236 states, 24231 states have (on average 1.836449176674508) internal successors, (44499), 24235 states have internal predecessors, (44499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24236 states to 24236 states and 44499 transitions. [2021-11-07 01:00:57,332 INFO L78 Accepts]: Start accepts. Automaton has 24236 states and 44499 transitions. Word has length 105 [2021-11-07 01:00:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:00:57,333 INFO L470 AbstractCegarLoop]: Abstraction has 24236 states and 44499 transitions. [2021-11-07 01:00:57,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:00:57,333 INFO L276 IsEmpty]: Start isEmpty. Operand 24236 states and 44499 transitions. [2021-11-07 01:00:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:00:57,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:57,335 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:00:57,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:00:57,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:00:57,536 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:00:57,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:57,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1660188947, now seen corresponding path program 1 times [2021-11-07 01:00:57,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:57,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857931640] [2021-11-07 01:00:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:57,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:57,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:57,538 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:57,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:00:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:58,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:00:58,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:58,941 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 01:00:58,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:59,348 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 01:00:59,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:00:59,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857931640] [2021-11-07 01:00:59,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857931640] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:00:59,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:00:59,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:00:59,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013427258] [2021-11-07 01:00:59,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:00:59,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:00:59,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:00:59,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:00:59,350 INFO L87 Difference]: Start difference. First operand 24236 states and 44499 transitions. Second operand has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:04,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:04,589 INFO L93 Difference]: Finished difference Result 73446 states and 134850 transitions. [2021-11-07 01:01:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:01:04,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 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 106 [2021-11-07 01:01:04,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:04,665 INFO L225 Difference]: With dead ends: 73446 [2021-11-07 01:01:04,665 INFO L226 Difference]: Without dead ends: 51946 [2021-11-07 01:01:04,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:01:04,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51946 states. [2021-11-07 01:01:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51946 to 19595. [2021-11-07 01:01:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19595 states, 19590 states have (on average 1.8272588055130168) internal successors, (35796), 19594 states have internal predecessors, (35796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19595 states to 19595 states and 35796 transitions. [2021-11-07 01:01:06,367 INFO L78 Accepts]: Start accepts. Automaton has 19595 states and 35796 transitions. Word has length 106 [2021-11-07 01:01:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:06,368 INFO L470 AbstractCegarLoop]: Abstraction has 19595 states and 35796 transitions. [2021-11-07 01:01:06,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:06,368 INFO L276 IsEmpty]: Start isEmpty. Operand 19595 states and 35796 transitions. [2021-11-07 01:01:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:01:06,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:06,371 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:01:06,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:06,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:01:06,585 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:01:06,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:06,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1235877711, now seen corresponding path program 1 times [2021-11-07 01:01:06,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:06,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419873101] [2021-11-07 01:01:06,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:06,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:06,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:06,588 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:06,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:01:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:07,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:01:07,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:07,979 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 01:01:07,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:08,356 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 01:01:08,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:08,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419873101] [2021-11-07 01:01:08,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419873101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:08,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:08,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:01:08,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567030327] [2021-11-07 01:01:08,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:01:08,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:08,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:01:08,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:01:08,359 INFO L87 Difference]: Start difference. First operand 19595 states and 35796 transitions. Second operand has 10 states, 10 states have (on average 20.3) internal successors, (203), 9 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:25,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:25,599 INFO L93 Difference]: Finished difference Result 139162 states and 253492 transitions. [2021-11-07 01:01:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 01:01:25,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.3) internal successors, (203), 9 states have internal predecessors, (203), 0 states have call successors, (0), 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 106 [2021-11-07 01:01:25,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:25,817 INFO L225 Difference]: With dead ends: 139162 [2021-11-07 01:01:25,817 INFO L226 Difference]: Without dead ends: 120863 [2021-11-07 01:01:25,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:01:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120863 states. [2021-11-07 01:01:30,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120863 to 50698. [2021-11-07 01:01:30,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50698 states, 50693 states have (on average 1.8342374686840393) internal successors, (92983), 50697 states have internal predecessors, (92983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50698 states to 50698 states and 92983 transitions. [2021-11-07 01:01:30,417 INFO L78 Accepts]: Start accepts. Automaton has 50698 states and 92983 transitions. Word has length 106 [2021-11-07 01:01:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:30,418 INFO L470 AbstractCegarLoop]: Abstraction has 50698 states and 92983 transitions. [2021-11-07 01:01:30,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.3) internal successors, (203), 9 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 50698 states and 92983 transitions. [2021-11-07 01:01:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-07 01:01:30,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:30,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:01:30,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:30,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:01:30,622 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:01:30,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:30,623 INFO L85 PathProgramCache]: Analyzing trace with hash -727503147, now seen corresponding path program 1 times [2021-11-07 01:01:30,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:30,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961066579] [2021-11-07 01:01:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:30,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:30,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:30,625 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:30,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_868568ef-8384-484f-87f0-f6c5b41d76ca/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:01:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:31,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:01:31,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:32,007 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 01:01:32,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:32,233 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 01:01:32,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:32,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961066579] [2021-11-07 01:01:32,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961066579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:32,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:32,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:01:32,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162116965] [2021-11-07 01:01:32,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:01:32,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:01:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:01:32,235 INFO L87 Difference]: Start difference. First operand 50698 states and 92983 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:45,848 INFO L93 Difference]: Finished difference Result 193567 states and 355904 transitions. [2021-11-07 01:01:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:01:45,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2021-11-07 01:01:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:46,122 INFO L225 Difference]: With dead ends: 193567 [2021-11-07 01:01:46,122 INFO L226 Difference]: Without dead ends: 145627 [2021-11-07 01:01:46,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:01:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145627 states.