./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product03.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_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/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_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/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_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/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 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:14:29,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:14:29,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:14:29,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:14:29,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:14:29,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:14:29,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:14:29,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:14:29,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:14:29,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:14:29,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:14:29,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:14:29,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:14:29,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:14:29,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:14:29,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:14:29,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:14:29,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:14:29,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:14:30,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:14:30,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:14:30,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:14:30,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:14:30,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:14:30,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:14:30,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:14:30,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:14:30,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:14:30,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:14:30,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:14:30,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:14:30,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:14:30,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:14:30,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:14:30,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:14:30,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:14:30,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:14:30,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:14:30,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:14:30,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:14:30,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:14:30,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:14:30,076 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:14:30,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:14:30,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:14:30,078 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:14:30,078 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:14:30,078 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:14:30,078 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:14:30,078 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:14:30,079 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:14:30,079 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:14:30,080 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:14:30,080 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:14:30,081 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:14:30,082 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:14:30,082 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:14:30,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:14:30,083 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:14:30,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:14:30,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:14:30,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:14:30,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:14:30,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:14:30,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:14:30,085 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:14:30,085 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:14:30,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:14:30,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:14:30,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:14:30,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:14:30,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:14:30,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:14:30,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:14:30,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:14:30,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:14:30,089 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:14:30,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:14:30,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:14:30,090 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:14:30,090 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:14:30,090 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_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 [2021-11-07 02:14:30,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:14:30,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:14:30,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:14:30,405 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:14:30,406 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:14:30,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2021-11-07 02:14:30,473 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/data/0b791a7cf/ccbc065fe18b42afb2447f4238ec7bd6/FLAG8d5aba955 [2021-11-07 02:14:31,180 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:14:31,180 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2021-11-07 02:14:31,221 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/data/0b791a7cf/ccbc065fe18b42afb2447f4238ec7bd6/FLAG8d5aba955 [2021-11-07 02:14:31,366 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/data/0b791a7cf/ccbc065fe18b42afb2447f4238ec7bd6 [2021-11-07 02:14:31,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:14:31,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:14:31,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:14:31,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:14:31,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:14:31,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:14:31" (1/1) ... [2021-11-07 02:14:31,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b0e9978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:31, skipping insertion in model container [2021-11-07 02:14:31,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:14:31" (1/1) ... [2021-11-07 02:14:31,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:14:31,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:14:31,990 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_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2021-11-07 02:14:32,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:14:32,046 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 02:14:32,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@58990301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:32, skipping insertion in model container [2021-11-07 02:14:32,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:14:32,047 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:14:32,049 INFO L168 Benchmark]: Toolchain (without parser) took 675.68 ms. Allocated memory is still 142.6 MB. Free memory was 100.0 MB in the beginning and 102.1 MB in the end (delta: -2.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 02:14:32,050 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 142.6 MB. Free memory is still 118.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:14:32,051 INFO L168 Benchmark]: CACSL2BoogieTranslator took 671.00 ms. Allocated memory is still 142.6 MB. Free memory was 99.7 MB in the beginning and 102.1 MB in the end (delta: -2.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 02:14:32,052 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 142.6 MB. Free memory is still 118.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 671.00 ms. Allocated memory is still 142.6 MB. Free memory was 99.7 MB in the beginning and 102.1 MB in the end (delta: -2.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 115]: 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_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/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_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/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_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/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 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:14:34,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:14:34,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:14:34,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:14:34,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:14:34,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:14:34,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:14:34,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:14:34,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:14:34,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:14:34,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:14:34,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:14:34,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:14:34,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:14:34,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:14:34,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:14:34,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:14:34,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:14:34,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:14:34,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:14:34,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:14:34,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:14:34,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:14:34,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:14:34,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:14:34,379 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:14:34,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:14:34,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:14:34,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:14:34,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:14:34,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:14:34,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:14:34,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:14:34,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:14:34,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:14:34,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:14:34,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:14:34,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:14:34,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:14:34,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:14:34,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:14:34,396 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:14:34,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:14:34,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:14:34,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:14:34,449 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:14:34,449 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:14:34,449 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:14:34,450 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:14:34,450 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:14:34,450 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:14:34,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:14:34,453 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:14:34,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:14:34,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:14:34,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:14:34,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:14:34,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:14:34,454 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:14:34,455 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:14:34,455 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:14:34,455 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:14:34,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:14:34,455 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:14:34,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:14:34,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:14:34,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:14:34,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:14:34,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:14:34,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:14:34,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:14:34,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:14:34,458 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:14:34,458 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:34,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:14:34,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:14:34,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:14:34,459 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_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 [2021-11-07 02:14:34,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:14:34,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:14:34,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:14:34,890 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:14:34,890 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:14:34,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2021-11-07 02:14:34,970 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/data/0f8c6703f/f229d5c1ef324dcaa0c2628b5fdbe9cb/FLAG3fa38afc3 [2021-11-07 02:14:35,641 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:14:35,642 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2021-11-07 02:14:35,685 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/data/0f8c6703f/f229d5c1ef324dcaa0c2628b5fdbe9cb/FLAG3fa38afc3 [2021-11-07 02:14:35,837 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/data/0f8c6703f/f229d5c1ef324dcaa0c2628b5fdbe9cb [2021-11-07 02:14:35,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:14:35,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:14:35,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:14:35,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:14:35,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:14:35,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:14:35" (1/1) ... [2021-11-07 02:14:35,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2163b741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:35, skipping insertion in model container [2021-11-07 02:14:35,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:14:35" (1/1) ... [2021-11-07 02:14:35,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:14:35,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:14:36,514 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_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2021-11-07 02:14:36,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:14:36,579 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:14:36,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:14:36,722 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_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2021-11-07 02:14:36,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:14:36,776 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:14:36,879 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_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2021-11-07 02:14:36,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:14:36,926 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:14:36,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:36 WrapperNode [2021-11-07 02:14:36,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:14:36,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:14:36,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:14:36,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:14:36,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:36" (1/1) ... [2021-11-07 02:14:36,972 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:36" (1/1) ... [2021-11-07 02:14:37,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:14:37,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:14:37,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:14:37,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:14:37,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:36" (1/1) ... [2021-11-07 02:14:37,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:36" (1/1) ... [2021-11-07 02:14:37,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:36" (1/1) ... [2021-11-07 02:14:37,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:36" (1/1) ... [2021-11-07 02:14:37,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:36" (1/1) ... [2021-11-07 02:14:37,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:36" (1/1) ... [2021-11-07 02:14:37,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:36" (1/1) ... [2021-11-07 02:14:37,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:14:37,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:14:37,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:14:37,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:14:37,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:36" (1/1) ... [2021-11-07 02:14:37,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:14:37,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:14:37,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:14:37,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:14:37,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:14:37,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:14:37,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:14:37,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:14:45,555 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:14:45,555 INFO L299 CfgBuilder]: Removed 505 assume(true) statements. [2021-11-07 02:14:45,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:14:45 BoogieIcfgContainer [2021-11-07 02:14:45,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:14:45,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:14:45,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:14:45,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:14:45,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:14:35" (1/3) ... [2021-11-07 02:14:45,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ac55d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:14:45, skipping insertion in model container [2021-11-07 02:14:45,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:36" (2/3) ... [2021-11-07 02:14:45,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ac55d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:14:45, skipping insertion in model container [2021-11-07 02:14:45,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:14:45" (3/3) ... [2021-11-07 02:14:45,569 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product03.cil.c [2021-11-07 02:14:45,574 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:14:45,575 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:14:45,637 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:14:45,643 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 02:14:45,643 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:14:45,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 2303 states, 2297 states have (on average 1.8972572921201567) internal successors, (4358), 2302 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:14:45,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:45,735 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] [2021-11-07 02:14:45,735 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 02:14:45,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:45,745 INFO L85 PathProgramCache]: Analyzing trace with hash 13983143, now seen corresponding path program 1 times [2021-11-07 02:14:45,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:45,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502620182] [2021-11-07 02:14:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:45,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:45,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:45,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:45,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:14:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:46,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:14:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:46,397 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 02:14:46,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:46,506 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 02:14:46,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:46,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502620182] [2021-11-07 02:14:46,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502620182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:46,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:46,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:14:46,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337595441] [2021-11-07 02:14:46,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:14:46,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:46,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:14:46,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:14:46,540 INFO L87 Difference]: Start difference. First operand has 2303 states, 2297 states have (on average 1.8972572921201567) internal successors, (4358), 2302 states have internal predecessors, (4358), 0 states have call successors, (0), 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 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:46,648 INFO L93 Difference]: Finished difference Result 2322 states and 4381 transitions. [2021-11-07 02:14:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:14:46,650 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-07 02:14:46,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:46,688 INFO L225 Difference]: With dead ends: 2322 [2021-11-07 02:14:46,688 INFO L226 Difference]: Without dead ends: 2299 [2021-11-07 02:14:46,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 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 02:14:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2021-11-07 02:14:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2299. [2021-11-07 02:14:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2294 states have (on average 1.8945074106364428) internal successors, (4346), 2298 states have internal predecessors, (4346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 4346 transitions. [2021-11-07 02:14:46,851 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 4346 transitions. Word has length 53 [2021-11-07 02:14:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:46,893 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 4346 transitions. [2021-11-07 02:14:46,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 4346 transitions. [2021-11-07 02:14:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:14:46,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:46,896 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:46,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:47,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:47,103 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 02:14:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:47,104 INFO L85 PathProgramCache]: Analyzing trace with hash 390586550, now seen corresponding path program 1 times [2021-11-07 02:14:47,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:47,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037434424] [2021-11-07 02:14:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:47,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:47,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:47,109 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:47,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:14:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:47,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:14:47,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:47,646 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 02:14:47,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:47,821 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 02:14:47,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:47,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037434424] [2021-11-07 02:14:47,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037434424] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:47,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:47,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:14:47,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89009546] [2021-11-07 02:14:47,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:47,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:47,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:47,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:47,831 INFO L87 Difference]: Start difference. First operand 2299 states and 4346 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:48,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:48,122 INFO L93 Difference]: Finished difference Result 6817 states and 12895 transitions. [2021-11-07 02:14:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:48,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 02:14:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:48,157 INFO L225 Difference]: With dead ends: 6817 [2021-11-07 02:14:48,157 INFO L226 Difference]: Without dead ends: 4531 [2021-11-07 02:14:48,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:48,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4531 states. [2021-11-07 02:14:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 2299. [2021-11-07 02:14:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2294 states have (on average 1.8914559721011335) internal successors, (4339), 2298 states have internal predecessors, (4339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 4339 transitions. [2021-11-07 02:14:48,334 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 4339 transitions. Word has length 55 [2021-11-07 02:14:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:48,334 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 4339 transitions. [2021-11-07 02:14:48,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 4339 transitions. [2021-11-07 02:14:48,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:14:48,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:48,339 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 02:14:48,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 02:14:48,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:48,552 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 02:14:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:48,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1300801709, now seen corresponding path program 1 times [2021-11-07 02:14:48,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:48,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752986954] [2021-11-07 02:14:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:48,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:48,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:48,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:48,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:14:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:48,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:14:48,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:49,118 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 02:14:49,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:49,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:49,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752986954] [2021-11-07 02:14:49,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752986954] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:49,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:49,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:14:49,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498105813] [2021-11-07 02:14:49,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:14:49,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:49,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:14:49,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:14:49,289 INFO L87 Difference]: Start difference. First operand 2299 states and 4339 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 02:14:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:50,204 INFO L93 Difference]: Finished difference Result 15568 states and 29425 transitions. [2021-11-07 02:14:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:14:50,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 02:14:50,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:50,298 INFO L225 Difference]: With dead ends: 15568 [2021-11-07 02:14:50,298 INFO L226 Difference]: Without dead ends: 13291 [2021-11-07 02:14:50,305 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 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 02:14:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13291 states. [2021-11-07 02:14:50,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13291 to 2277. [2021-11-07 02:14:50,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2272 states have (on average 1.8873239436619718) internal successors, (4288), 2276 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 4288 transitions. [2021-11-07 02:14:50,508 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 4288 transitions. Word has length 61 [2021-11-07 02:14:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:50,509 INFO L470 AbstractCegarLoop]: Abstraction has 2277 states and 4288 transitions. [2021-11-07 02:14:50,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 02:14:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 4288 transitions. [2021-11-07 02:14:50,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:14:50,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:50,542 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:50,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:50,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:50,743 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 02:14:50,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:50,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1081351796, now seen corresponding path program 1 times [2021-11-07 02:14:50,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:50,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816210822] [2021-11-07 02:14:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:50,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:50,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:50,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:50,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:14:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:51,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:14:51,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:51,353 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 02:14:51,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:51,528 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 02:14:51,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:51,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816210822] [2021-11-07 02:14:51,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816210822] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:51,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:51,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:14:51,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623236543] [2021-11-07 02:14:51,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:51,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:51,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:51,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:51,532 INFO L87 Difference]: Start difference. First operand 2277 states and 4288 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:51,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:51,886 INFO L93 Difference]: Finished difference Result 6728 states and 12699 transitions. [2021-11-07 02:14:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:51,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:14:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:51,932 INFO L225 Difference]: With dead ends: 6728 [2021-11-07 02:14:51,932 INFO L226 Difference]: Without dead ends: 4473 [2021-11-07 02:14:51,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 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 02:14:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2021-11-07 02:14:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 2277. [2021-11-07 02:14:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2272 states have (on average 1.8824823943661972) internal successors, (4277), 2276 states have internal predecessors, (4277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 4277 transitions. [2021-11-07 02:14:52,120 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 4277 transitions. Word has length 63 [2021-11-07 02:14:52,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:52,120 INFO L470 AbstractCegarLoop]: Abstraction has 2277 states and 4277 transitions. [2021-11-07 02:14:52,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:52,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 4277 transitions. [2021-11-07 02:14:52,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:14:52,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:52,125 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] [2021-11-07 02:14:52,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:52,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:52,339 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 02:14:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:52,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1127545143, now seen corresponding path program 1 times [2021-11-07 02:14:52,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:52,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098013516] [2021-11-07 02:14:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:52,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:52,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:52,342 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:52,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:14:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:52,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:14:52,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:52,994 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 02:14:52,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:53,223 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 02:14:53,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:53,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098013516] [2021-11-07 02:14:53,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098013516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:53,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:53,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:14:53,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896490926] [2021-11-07 02:14:53,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:14:53,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:53,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:14:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:14:53,225 INFO L87 Difference]: Start difference. First operand 2277 states and 4277 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:55,268 INFO L93 Difference]: Finished difference Result 24291 states and 45881 transitions. [2021-11-07 02:14:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:14:55,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 02:14:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:55,335 INFO L225 Difference]: With dead ends: 24291 [2021-11-07 02:14:55,335 INFO L226 Difference]: Without dead ends: 22039 [2021-11-07 02:14:55,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 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 02:14:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22039 states. [2021-11-07 02:14:55,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22039 to 2279. [2021-11-07 02:14:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2274 states have (on average 1.8795074758135444) internal successors, (4274), 2278 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 4274 transitions. [2021-11-07 02:14:55,689 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 4274 transitions. Word has length 69 [2021-11-07 02:14:55,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:55,689 INFO L470 AbstractCegarLoop]: Abstraction has 2279 states and 4274 transitions. [2021-11-07 02:14:55,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:55,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 4274 transitions. [2021-11-07 02:14:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:14:55,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:55,693 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:55,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:55,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:55,908 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 02:14:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1931174940, now seen corresponding path program 1 times [2021-11-07 02:14:55,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:55,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928056313] [2021-11-07 02:14:55,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:55,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:55,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:55,911 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:55,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:14:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:56,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:14:56,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:56,656 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 02:14:56,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:56,886 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 02:14:56,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:56,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928056313] [2021-11-07 02:14:56,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928056313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:56,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:56,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:14:56,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911946348] [2021-11-07 02:14:56,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:14:56,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:56,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:14:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:14:56,889 INFO L87 Difference]: Start difference. First operand 2279 states and 4274 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:58,650 INFO L93 Difference]: Finished difference Result 24259 states and 45802 transitions. [2021-11-07 02:14:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:14:58,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 02:14:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:58,704 INFO L225 Difference]: With dead ends: 24259 [2021-11-07 02:14:58,704 INFO L226 Difference]: Without dead ends: 22007 [2021-11-07 02:14:58,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 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 02:14:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22007 states. [2021-11-07 02:14:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22007 to 2283. [2021-11-07 02:14:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2278 states have (on average 1.8775241439859527) internal successors, (4277), 2282 states have internal predecessors, (4277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:59,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 4277 transitions. [2021-11-07 02:14:59,052 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 4277 transitions. Word has length 71 [2021-11-07 02:14:59,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:59,053 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 4277 transitions. [2021-11-07 02:14:59,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:59,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 4277 transitions. [2021-11-07 02:14:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:14:59,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:59,056 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] [2021-11-07 02:14:59,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:59,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:59,273 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 02:14:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:59,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1023050935, now seen corresponding path program 1 times [2021-11-07 02:14:59,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:59,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013926374] [2021-11-07 02:14:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:59,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:59,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:59,277 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:59,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:14:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:59,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:14:59,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:59,918 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 02:14:59,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:00,104 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 02:15:00,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:00,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013926374] [2021-11-07 02:15:00,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013926374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:00,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:00,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:15:00,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065926607] [2021-11-07 02:15:00,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:15:00,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:00,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:15:00,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:00,106 INFO L87 Difference]: Start difference. First operand 2283 states and 4277 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:00,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:00,226 INFO L93 Difference]: Finished difference Result 4514 states and 8485 transitions. [2021-11-07 02:15:00,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:15:00,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 02:15:00,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:00,233 INFO L225 Difference]: With dead ends: 4514 [2021-11-07 02:15:00,233 INFO L226 Difference]: Without dead ends: 2262 [2021-11-07 02:15:00,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 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 02:15:00,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-11-07 02:15:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2262. [2021-11-07 02:15:00,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2257 states have (on average 1.8781568453699602) internal successors, (4239), 2261 states have internal predecessors, (4239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 4239 transitions. [2021-11-07 02:15:00,389 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 4239 transitions. Word has length 73 [2021-11-07 02:15:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:00,390 INFO L470 AbstractCegarLoop]: Abstraction has 2262 states and 4239 transitions. [2021-11-07 02:15:00,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 4239 transitions. [2021-11-07 02:15:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:15:00,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:00,393 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:00,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:00,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:00,608 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 02:15:00,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:00,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1285114975, now seen corresponding path program 1 times [2021-11-07 02:15:00,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:00,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122776409] [2021-11-07 02:15:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:00,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:00,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:00,610 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:00,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:15:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:01,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:15:01,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:01,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:01,552 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 02:15:01,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:01,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122776409] [2021-11-07 02:15:01,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122776409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:01,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:01,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:15:01,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662277788] [2021-11-07 02:15:01,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:15:01,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:01,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:15:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:15:01,555 INFO L87 Difference]: Start difference. First operand 2262 states and 4239 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:01,841 INFO L93 Difference]: Finished difference Result 4458 states and 8388 transitions. [2021-11-07 02:15:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:15:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:15:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:01,846 INFO L225 Difference]: With dead ends: 4458 [2021-11-07 02:15:01,846 INFO L226 Difference]: Without dead ends: 2237 [2021-11-07 02:15:01,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 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 02:15:01,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-11-07 02:15:01,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2237. [2021-11-07 02:15:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2232 states have (on average 1.8794802867383513) internal successors, (4195), 2236 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 4195 transitions. [2021-11-07 02:15:01,982 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 4195 transitions. Word has length 74 [2021-11-07 02:15:01,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:01,982 INFO L470 AbstractCegarLoop]: Abstraction has 2237 states and 4195 transitions. [2021-11-07 02:15:01,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:01,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 4195 transitions. [2021-11-07 02:15:01,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:15:01,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:01,988 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:02,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:02,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:02,204 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 02:15:02,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:02,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1547399304, now seen corresponding path program 1 times [2021-11-07 02:15:02,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:02,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806072595] [2021-11-07 02:15:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:02,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:02,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:02,206 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:02,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:15:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:02,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:15:02,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:02,900 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 02:15:02,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:03,101 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 02:15:03,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:03,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806072595] [2021-11-07 02:15:03,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806072595] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:03,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:03,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:15:03,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938704222] [2021-11-07 02:15:03,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:15:03,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:15:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:03,107 INFO L87 Difference]: Start difference. First operand 2237 states and 4195 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:03,233 INFO L93 Difference]: Finished difference Result 4433 states and 8344 transitions. [2021-11-07 02:15:03,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:15:03,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:15:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:03,237 INFO L225 Difference]: With dead ends: 4433 [2021-11-07 02:15:03,237 INFO L226 Difference]: Without dead ends: 2234 [2021-11-07 02:15:03,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 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 02:15:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-11-07 02:15:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2234. [2021-11-07 02:15:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2229 states have (on average 1.8784208165096457) internal successors, (4187), 2233 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 4187 transitions. [2021-11-07 02:15:03,365 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 4187 transitions. Word has length 75 [2021-11-07 02:15:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:03,366 INFO L470 AbstractCegarLoop]: Abstraction has 2234 states and 4187 transitions. [2021-11-07 02:15:03,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 4187 transitions. [2021-11-07 02:15:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:15:03,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:03,368 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:03,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:03,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:03,581 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 02:15:03,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:03,582 INFO L85 PathProgramCache]: Analyzing trace with hash 605407655, now seen corresponding path program 1 times [2021-11-07 02:15:03,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:03,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199517012] [2021-11-07 02:15:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:03,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:03,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:03,584 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:03,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:15:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:04,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:15:04,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:04,423 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 02:15:04,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:04,636 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 02:15:04,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:04,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199517012] [2021-11-07 02:15:04,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199517012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:04,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:04,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:15:04,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097368664] [2021-11-07 02:15:04,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:15:04,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:04,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:15:04,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:15:04,638 INFO L87 Difference]: Start difference. First operand 2234 states and 4187 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:04,781 INFO L93 Difference]: Finished difference Result 4424 states and 8326 transitions. [2021-11-07 02:15:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:15:04,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 02:15:04,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:04,788 INFO L225 Difference]: With dead ends: 4424 [2021-11-07 02:15:04,788 INFO L226 Difference]: Without dead ends: 2232 [2021-11-07 02:15:04,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 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 02:15:04,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-11-07 02:15:04,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 2232. [2021-11-07 02:15:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2227 states have (on average 1.877413560844185) internal successors, (4181), 2231 states have internal predecessors, (4181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 4181 transitions. [2021-11-07 02:15:04,981 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 4181 transitions. Word has length 76 [2021-11-07 02:15:04,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:04,981 INFO L470 AbstractCegarLoop]: Abstraction has 2232 states and 4181 transitions. [2021-11-07 02:15:04,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 4181 transitions. [2021-11-07 02:15:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:15:04,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:04,984 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:05,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:05,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:05,198 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 02:15:05,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:05,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1546323955, now seen corresponding path program 1 times [2021-11-07 02:15:05,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:05,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297340262] [2021-11-07 02:15:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:05,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:05,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:05,200 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:05,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:15:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:15:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:05,925 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 02:15:05,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:06,090 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 02:15:06,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:06,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297340262] [2021-11-07 02:15:06,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297340262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:06,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:06,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:15:06,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224423829] [2021-11-07 02:15:06,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:15:06,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:15:06,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:15:06,096 INFO L87 Difference]: Start difference. First operand 2232 states and 4181 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 02:15:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:06,230 INFO L93 Difference]: Finished difference Result 4417 states and 8311 transitions. [2021-11-07 02:15:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:15:06,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 77 [2021-11-07 02:15:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:06,233 INFO L225 Difference]: With dead ends: 4417 [2021-11-07 02:15:06,234 INFO L226 Difference]: Without dead ends: 2230 [2021-11-07 02:15:06,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 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 02:15:06,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-11-07 02:15:06,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2230. [2021-11-07 02:15:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2225 states have (on average 1.8764044943820224) internal successors, (4175), 2229 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 4175 transitions. [2021-11-07 02:15:06,366 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 4175 transitions. Word has length 77 [2021-11-07 02:15:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:06,366 INFO L470 AbstractCegarLoop]: Abstraction has 2230 states and 4175 transitions. [2021-11-07 02:15:06,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 02:15:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 4175 transitions. [2021-11-07 02:15:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:15:06,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:06,375 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:06,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:06,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:06,597 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 02:15:06,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:06,597 INFO L85 PathProgramCache]: Analyzing trace with hash -738611566, now seen corresponding path program 1 times [2021-11-07 02:15:06,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:06,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284408424] [2021-11-07 02:15:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:06,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:06,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:06,599 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:06,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:15:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:07,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:15:07,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:07,395 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 02:15:07,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:07,611 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 02:15:07,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:07,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284408424] [2021-11-07 02:15:07,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284408424] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:07,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:07,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:15:07,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025445829] [2021-11-07 02:15:07,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:15:07,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:07,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:15:07,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:15:07,613 INFO L87 Difference]: Start difference. First operand 2230 states and 4175 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:09,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:09,094 INFO L93 Difference]: Finished difference Result 8016 states and 15119 transitions. [2021-11-07 02:15:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:15:09,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 02:15:09,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:09,100 INFO L225 Difference]: With dead ends: 8016 [2021-11-07 02:15:09,100 INFO L226 Difference]: Without dead ends: 5837 [2021-11-07 02:15:09,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 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 02:15:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5837 states. [2021-11-07 02:15:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5837 to 2230. [2021-11-07 02:15:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2225 states have (on average 1.830561797752809) internal successors, (4073), 2229 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 4073 transitions. [2021-11-07 02:15:09,254 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 4073 transitions. Word has length 78 [2021-11-07 02:15:09,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:09,254 INFO L470 AbstractCegarLoop]: Abstraction has 2230 states and 4073 transitions. [2021-11-07 02:15:09,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:09,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 4073 transitions. [2021-11-07 02:15:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:15:09,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:09,257 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] [2021-11-07 02:15:09,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:09,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:09,474 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 02:15:09,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:09,474 INFO L85 PathProgramCache]: Analyzing trace with hash -178845954, now seen corresponding path program 1 times [2021-11-07 02:15:09,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:09,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671811944] [2021-11-07 02:15:09,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:09,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:09,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:09,477 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:09,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:15:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:10,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:15:10,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:10,349 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 02:15:10,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:10,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:10,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671811944] [2021-11-07 02:15:10,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671811944] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:10,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:10,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:15:10,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940490679] [2021-11-07 02:15:10,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:15:10,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:10,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:15:10,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:15:10,584 INFO L87 Difference]: Start difference. First operand 2230 states and 4073 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:11,440 INFO L93 Difference]: Finished difference Result 6169 states and 11426 transitions. [2021-11-07 02:15:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:15:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 02:15:11,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:11,445 INFO L225 Difference]: With dead ends: 6169 [2021-11-07 02:15:11,445 INFO L226 Difference]: Without dead ends: 4008 [2021-11-07 02:15:11,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 166 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 02:15:11,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-11-07 02:15:11,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 2196. [2021-11-07 02:15:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2191 states have (on average 1.8306709265175718) internal successors, (4011), 2195 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 4011 transitions. [2021-11-07 02:15:11,708 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 4011 transitions. Word has length 86 [2021-11-07 02:15:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:11,708 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 4011 transitions. [2021-11-07 02:15:11,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:11,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 4011 transitions. [2021-11-07 02:15:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 02:15:11,711 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:11,712 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] [2021-11-07 02:15:11,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:11,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:11,927 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 02:15:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1555279906, now seen corresponding path program 1 times [2021-11-07 02:15:11,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:11,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678203418] [2021-11-07 02:15:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:11,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:11,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:11,929 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:11,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:15:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:12,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:15:12,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:12,842 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 02:15:12,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:13,072 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 02:15:13,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:13,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678203418] [2021-11-07 02:15:13,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678203418] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:13,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:13,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:15:13,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719691672] [2021-11-07 02:15:13,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:15:13,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:13,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:15:13,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:15:13,075 INFO L87 Difference]: Start difference. First operand 2196 states and 4011 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:14,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:14,552 INFO L93 Difference]: Finished difference Result 8630 states and 15937 transitions. [2021-11-07 02:15:14,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:15:14,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 02:15:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:14,562 INFO L225 Difference]: With dead ends: 8630 [2021-11-07 02:15:14,563 INFO L226 Difference]: Without dead ends: 6502 [2021-11-07 02:15:14,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 171 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 02:15:14,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6502 states. [2021-11-07 02:15:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6502 to 2200. [2021-11-07 02:15:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2195 states have (on average 1.8291571753986333) internal successors, (4015), 2199 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 4015 transitions. [2021-11-07 02:15:14,740 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 4015 transitions. Word has length 88 [2021-11-07 02:15:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:14,741 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 4015 transitions. [2021-11-07 02:15:14,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 4015 transitions. [2021-11-07 02:15:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 02:15:14,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:14,744 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 02:15:14,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:14,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:14,957 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 02:15:14,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:14,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1282644095, now seen corresponding path program 1 times [2021-11-07 02:15:14,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:14,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306337367] [2021-11-07 02:15:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:14,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:14,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:14,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:14,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:15:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:15,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:15:15,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:15,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:16,072 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 02:15:16,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:16,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306337367] [2021-11-07 02:15:16,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306337367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:16,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:16,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:15:16,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968784693] [2021-11-07 02:15:16,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:15:16,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:16,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:15:16,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:16,074 INFO L87 Difference]: Start difference. First operand 2200 states and 4015 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 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 02:15:17,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:17,200 INFO L93 Difference]: Finished difference Result 6062 states and 11158 transitions. [2021-11-07 02:15:17,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:15:17,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 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 02:15:17,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:17,204 INFO L225 Difference]: With dead ends: 6062 [2021-11-07 02:15:17,205 INFO L226 Difference]: Without dead ends: 3917 [2021-11-07 02:15:17,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 174 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 02:15:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2021-11-07 02:15:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 2992. [2021-11-07 02:15:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2987 states have (on average 1.8155339805825244) internal successors, (5423), 2991 states have internal predecessors, (5423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 5423 transitions. [2021-11-07 02:15:17,365 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 5423 transitions. Word has length 89 [2021-11-07 02:15:17,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:17,365 INFO L470 AbstractCegarLoop]: Abstraction has 2992 states and 5423 transitions. [2021-11-07 02:15:17,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 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 02:15:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 5423 transitions. [2021-11-07 02:15:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:15:17,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:17,368 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 02:15:17,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:17,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:17,583 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 02:15:17,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:17,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1602864519, now seen corresponding path program 1 times [2021-11-07 02:15:17,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:17,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260753619] [2021-11-07 02:15:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:17,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:17,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:17,585 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:17,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:15:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:18,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:15:18,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:18,586 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 02:15:18,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:18,809 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 02:15:18,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:18,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260753619] [2021-11-07 02:15:18,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260753619] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:18,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:18,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:15:18,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205504879] [2021-11-07 02:15:18,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:15:18,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:15:18,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:15:18,811 INFO L87 Difference]: Start difference. First operand 2992 states and 5423 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 02:15:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:19,864 INFO L93 Difference]: Finished difference Result 21484 states and 39327 transitions. [2021-11-07 02:15:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:15:19,865 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 02:15:19,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:19,884 INFO L225 Difference]: With dead ends: 21484 [2021-11-07 02:15:19,885 INFO L226 Difference]: Without dead ends: 18556 [2021-11-07 02:15:19,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 177 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 02:15:19,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18556 states. [2021-11-07 02:15:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18556 to 5489. [2021-11-07 02:15:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5489 states, 5484 states have (on average 1.8302334062727936) internal successors, (10037), 5488 states have internal predecessors, (10037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 10037 transitions. [2021-11-07 02:15:20,228 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 10037 transitions. Word has length 91 [2021-11-07 02:15:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:20,229 INFO L470 AbstractCegarLoop]: Abstraction has 5489 states and 10037 transitions. [2021-11-07 02:15:20,229 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 02:15:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 10037 transitions. [2021-11-07 02:15:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:15:20,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:20,230 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 02:15:20,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:20,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:20,446 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 02:15:20,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:20,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1877624133, now seen corresponding path program 1 times [2021-11-07 02:15:20,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:20,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717924388] [2021-11-07 02:15:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:20,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:20,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:20,448 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:20,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:15:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:21,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:15:21,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:21,490 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 02:15:21,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:21,752 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 02:15:21,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:21,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717924388] [2021-11-07 02:15:21,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717924388] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:21,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:21,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:15:21,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346143335] [2021-11-07 02:15:21,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:15:21,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:21,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:15:21,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:15:21,754 INFO L87 Difference]: Start difference. First operand 5489 states and 10037 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 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 02:15:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:22,627 INFO L93 Difference]: Finished difference Result 9958 states and 18140 transitions. [2021-11-07 02:15:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:15:22,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 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 02:15:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:22,636 INFO L225 Difference]: With dead ends: 9958 [2021-11-07 02:15:22,636 INFO L226 Difference]: Without dead ends: 7552 [2021-11-07 02:15:22,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 176 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 02:15:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7552 states. [2021-11-07 02:15:22,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7552 to 5479. [2021-11-07 02:15:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5479 states, 5474 states have (on average 1.829923273657289) internal successors, (10017), 5478 states have internal predecessors, (10017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 10017 transitions. [2021-11-07 02:15:22,930 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 10017 transitions. Word has length 91 [2021-11-07 02:15:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:22,931 INFO L470 AbstractCegarLoop]: Abstraction has 5479 states and 10017 transitions. [2021-11-07 02:15:22,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 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 02:15:22,931 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 10017 transitions. [2021-11-07 02:15:22,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 02:15:22,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:22,932 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] [2021-11-07 02:15:22,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:23,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:23,133 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 02:15:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:23,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2027187445, now seen corresponding path program 1 times [2021-11-07 02:15:23,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:23,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909420047] [2021-11-07 02:15:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:23,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:23,136 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:23,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:15:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:23,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:15:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:24,202 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 02:15:24,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:24,435 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 02:15:24,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:24,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909420047] [2021-11-07 02:15:24,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909420047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:24,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:24,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:15:24,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531816014] [2021-11-07 02:15:24,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:15:24,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:24,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:15:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:15:24,440 INFO L87 Difference]: Start difference. First operand 5479 states and 10017 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:25,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:25,428 INFO L93 Difference]: Finished difference Result 16647 states and 30534 transitions. [2021-11-07 02:15:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:15:25,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-07 02:15:25,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:25,445 INFO L225 Difference]: With dead ends: 16647 [2021-11-07 02:15:25,445 INFO L226 Difference]: Without dead ends: 14247 [2021-11-07 02:15:25,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 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 02:15:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14247 states. [2021-11-07 02:15:25,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14247 to 7618. [2021-11-07 02:15:25,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7618 states, 7613 states have (on average 1.823985288322606) internal successors, (13886), 7617 states have internal predecessors, (13886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7618 states to 7618 states and 13886 transitions. [2021-11-07 02:15:25,866 INFO L78 Accepts]: Start accepts. Automaton has 7618 states and 13886 transitions. Word has length 93 [2021-11-07 02:15:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:25,867 INFO L470 AbstractCegarLoop]: Abstraction has 7618 states and 13886 transitions. [2021-11-07 02:15:25,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 7618 states and 13886 transitions. [2021-11-07 02:15:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 02:15:25,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:25,870 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] [2021-11-07 02:15:25,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:26,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:26,082 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 02:15:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash 918387229, now seen corresponding path program 1 times [2021-11-07 02:15:26,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:26,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426491537] [2021-11-07 02:15:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:26,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:26,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:26,084 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:26,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:15:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:26,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:15:26,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:27,232 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 02:15:27,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:27,527 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 02:15:27,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:27,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426491537] [2021-11-07 02:15:27,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426491537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:27,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:27,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:15:27,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121073591] [2021-11-07 02:15:27,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:15:27,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:27,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:15:27,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:15:27,529 INFO L87 Difference]: Start difference. First operand 7618 states and 13886 transitions. Second operand has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:30,248 INFO L93 Difference]: Finished difference Result 33379 states and 61305 transitions. [2021-11-07 02:15:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:15:30,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 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 95 [2021-11-07 02:15:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:30,281 INFO L225 Difference]: With dead ends: 33379 [2021-11-07 02:15:30,281 INFO L226 Difference]: Without dead ends: 28840 [2021-11-07 02:15:30,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 184 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 02:15:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28840 states. [2021-11-07 02:15:31,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28840 to 11028. [2021-11-07 02:15:31,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11028 states, 11023 states have (on average 1.8337113308536697) internal successors, (20213), 11027 states have internal predecessors, (20213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11028 states to 11028 states and 20213 transitions. [2021-11-07 02:15:31,092 INFO L78 Accepts]: Start accepts. Automaton has 11028 states and 20213 transitions. Word has length 95 [2021-11-07 02:15:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:31,093 INFO L470 AbstractCegarLoop]: Abstraction has 11028 states and 20213 transitions. [2021-11-07 02:15:31,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:31,093 INFO L276 IsEmpty]: Start isEmpty. Operand 11028 states and 20213 transitions. [2021-11-07 02:15:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 02:15:31,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:31,097 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] [2021-11-07 02:15:31,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:31,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:31,305 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 02:15:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:31,306 INFO L85 PathProgramCache]: Analyzing trace with hash 55305702, now seen corresponding path program 1 times [2021-11-07 02:15:31,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:31,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511318682] [2021-11-07 02:15:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:31,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:31,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:31,308 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:31,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:15:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:32,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:15:32,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:32,479 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 02:15:32,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:32,664 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 02:15:32,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:32,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511318682] [2021-11-07 02:15:32,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511318682] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:32,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:32,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:15:32,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455207196] [2021-11-07 02:15:32,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:15:32,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:32,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:15:32,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:15:32,666 INFO L87 Difference]: Start difference. First operand 11028 states and 20213 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:33,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:33,297 INFO L93 Difference]: Finished difference Result 19109 states and 34910 transitions. [2021-11-07 02:15:33,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:15:33,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-07 02:15:33,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:33,310 INFO L225 Difference]: With dead ends: 19109 [2021-11-07 02:15:33,310 INFO L226 Difference]: Without dead ends: 11043 [2021-11-07 02:15:33,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 198 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 02:15:33,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2021-11-07 02:15:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 11028. [2021-11-07 02:15:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11028 states, 11023 states have (on average 1.823732196316792) internal successors, (20103), 11027 states have internal predecessors, (20103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11028 states to 11028 states and 20103 transitions. [2021-11-07 02:15:34,131 INFO L78 Accepts]: Start accepts. Automaton has 11028 states and 20103 transitions. Word has length 102 [2021-11-07 02:15:34,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:34,131 INFO L470 AbstractCegarLoop]: Abstraction has 11028 states and 20103 transitions. [2021-11-07 02:15:34,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 11028 states and 20103 transitions. [2021-11-07 02:15:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 02:15:34,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:34,135 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] [2021-11-07 02:15:34,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:34,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:34,351 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 02:15:34,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:34,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1607798750, now seen corresponding path program 1 times [2021-11-07 02:15:34,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:34,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999349611] [2021-11-07 02:15:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:34,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:34,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:34,353 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:34,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:15:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:35,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:15:35,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:35,576 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 02:15:35,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:35,886 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 02:15:35,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:35,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999349611] [2021-11-07 02:15:35,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999349611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:35,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:35,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:15:35,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734492795] [2021-11-07 02:15:35,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:15:35,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:35,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:15:35,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:15:35,889 INFO L87 Difference]: Start difference. First operand 11028 states and 20103 transitions. Second operand has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 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 02:15:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:46,714 INFO L93 Difference]: Finished difference Result 63811 states and 115105 transitions. [2021-11-07 02:15:46,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 02:15:46,726 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 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 103 [2021-11-07 02:15:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:46,796 INFO L225 Difference]: With dead ends: 63811 [2021-11-07 02:15:46,796 INFO L226 Difference]: Without dead ends: 54252 [2021-11-07 02:15:46,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 02:15:46,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54252 states. [2021-11-07 02:15:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54252 to 22532. [2021-11-07 02:15:48,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22532 states, 22527 states have (on average 1.8150663648066765) internal successors, (40888), 22531 states have internal predecessors, (40888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:48,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22532 states to 22532 states and 40888 transitions. [2021-11-07 02:15:48,489 INFO L78 Accepts]: Start accepts. Automaton has 22532 states and 40888 transitions. Word has length 103 [2021-11-07 02:15:48,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:48,490 INFO L470 AbstractCegarLoop]: Abstraction has 22532 states and 40888 transitions. [2021-11-07 02:15:48,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 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 02:15:48,490 INFO L276 IsEmpty]: Start isEmpty. Operand 22532 states and 40888 transitions. [2021-11-07 02:15:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 02:15:48,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:48,493 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:48,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:48,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:48,709 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 02:15:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:48,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1318458559, now seen corresponding path program 1 times [2021-11-07 02:15:48,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:48,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302548283] [2021-11-07 02:15:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:48,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:48,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:48,711 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:48,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:15:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:49,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:15:49,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:49,954 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 02:15:49,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:50,172 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 02:15:50,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:50,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302548283] [2021-11-07 02:15:50,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302548283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:50,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:50,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:15:50,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424397323] [2021-11-07 02:15:50,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:15:50,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:50,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:15:50,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:15:50,174 INFO L87 Difference]: Start difference. First operand 22532 states and 40888 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:00,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:00,367 INFO L93 Difference]: Finished difference Result 114641 states and 203627 transitions. [2021-11-07 02:16:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:16:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-07 02:16:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:00,495 INFO L225 Difference]: With dead ends: 114641 [2021-11-07 02:16:00,495 INFO L226 Difference]: Without dead ends: 95456 [2021-11-07 02:16:00,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 203 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 02:16:00,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95456 states. [2021-11-07 02:16:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95456 to 28104. [2021-11-07 02:16:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28104 states, 28099 states have (on average 1.7504181643474857) internal successors, (49185), 28103 states have internal predecessors, (49185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28104 states to 28104 states and 49185 transitions. [2021-11-07 02:16:03,840 INFO L78 Accepts]: Start accepts. Automaton has 28104 states and 49185 transitions. Word has length 104 [2021-11-07 02:16:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:03,840 INFO L470 AbstractCegarLoop]: Abstraction has 28104 states and 49185 transitions. [2021-11-07 02:16:03,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 28104 states and 49185 transitions. [2021-11-07 02:16:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 02:16:03,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:03,844 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] [2021-11-07 02:16:03,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:04,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:04,057 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 02:16:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:04,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2131223101, now seen corresponding path program 1 times [2021-11-07 02:16:04,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:04,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378301776] [2021-11-07 02:16:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:04,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:04,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:04,059 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:04,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:16:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:05,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:16:05,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:05,511 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 02:16:05,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:05,963 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 02:16:05,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:05,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378301776] [2021-11-07 02:16:05,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378301776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:05,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:05,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:16:05,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276572796] [2021-11-07 02:16:05,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:16:05,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:16:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:16:05,966 INFO L87 Difference]: Start difference. First operand 28104 states and 49185 transitions. Second operand has 6 states, 6 states have (on average 32.0) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:13,013 INFO L93 Difference]: Finished difference Result 85666 states and 149949 transitions. [2021-11-07 02:16:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:16:13,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-07 02:16:13,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:13,100 INFO L225 Difference]: With dead ends: 85666 [2021-11-07 02:16:13,100 INFO L226 Difference]: Without dead ends: 61281 [2021-11-07 02:16:13,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 202 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 02:16:13,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61281 states. [2021-11-07 02:16:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61281 to 27054. [2021-11-07 02:16:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27054 states, 27049 states have (on average 1.7410625161743503) internal successors, (47094), 27053 states have internal predecessors, (47094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27054 states to 27054 states and 47094 transitions. [2021-11-07 02:16:16,226 INFO L78 Accepts]: Start accepts. Automaton has 27054 states and 47094 transitions. Word has length 104 [2021-11-07 02:16:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:16,227 INFO L470 AbstractCegarLoop]: Abstraction has 27054 states and 47094 transitions. [2021-11-07 02:16:16,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 27054 states and 47094 transitions. [2021-11-07 02:16:16,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 02:16:16,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:16,229 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] [2021-11-07 02:16:16,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:16,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:16,429 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 02:16:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:16,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1742105281, now seen corresponding path program 1 times [2021-11-07 02:16:16,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:16,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496096247] [2021-11-07 02:16:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:16,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:16,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:16,431 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:16,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:16:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:17,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:17,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:17,816 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 02:16:17,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:18,125 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 02:16:18,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:18,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496096247] [2021-11-07 02:16:18,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496096247] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:18,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:18,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:16:18,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300269118] [2021-11-07 02:16:18,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:18,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:18,127 INFO L87 Difference]: Start difference. First operand 27054 states and 47094 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:19,894 INFO L93 Difference]: Finished difference Result 46503 states and 81692 transitions. [2021-11-07 02:16:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:19,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-07 02:16:19,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:19,921 INFO L225 Difference]: With dead ends: 46503 [2021-11-07 02:16:19,921 INFO L226 Difference]: Without dead ends: 22772 [2021-11-07 02:16:19,941 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22772 states. [2021-11-07 02:16:22,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22772 to 22757. [2021-11-07 02:16:22,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22757 states, 22752 states have (on average 1.7841508438818565) internal successors, (40593), 22756 states have internal predecessors, (40593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22757 states to 22757 states and 40593 transitions. [2021-11-07 02:16:22,294 INFO L78 Accepts]: Start accepts. Automaton has 22757 states and 40593 transitions. Word has length 104 [2021-11-07 02:16:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:22,294 INFO L470 AbstractCegarLoop]: Abstraction has 22757 states and 40593 transitions. [2021-11-07 02:16:22,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 22757 states and 40593 transitions. [2021-11-07 02:16:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 02:16:22,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:22,297 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 02:16:22,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:22,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:22,513 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 02:16:22,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:22,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1708650709, now seen corresponding path program 1 times [2021-11-07 02:16:22,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:22,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383541937] [2021-11-07 02:16:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:22,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:22,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:22,515 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:22,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b188a81-b2aa-48fd-8e24-7fa0605e70c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:16:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:23,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:23,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:23,959 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 02:16:23,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:24,220 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 02:16:24,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:24,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383541937] [2021-11-07 02:16:24,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383541937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:24,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:24,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:16:24,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712418501] [2021-11-07 02:16:24,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:24,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:24,223 INFO L87 Difference]: Start difference. First operand 22757 states and 40593 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:31,497 INFO L93 Difference]: Finished difference Result 86443 states and 154095 transitions. [2021-11-07 02:16:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-07 02:16:31,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:31,581 INFO L225 Difference]: With dead ends: 86443 [2021-11-07 02:16:31,581 INFO L226 Difference]: Without dead ends: 65175 [2021-11-07 02:16:31,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 206 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 02:16:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65175 states.