./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product31.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_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/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_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/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_98cc6382-49ab-4df2-bd9a-ed2dd407352b/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 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:52:31,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:52:31,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:52:31,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:52:31,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:52:31,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:52:31,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:52:31,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:52:31,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:52:31,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:52:31,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:52:31,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:52:31,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:52:31,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:52:31,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:52:31,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:52:31,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:52:31,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:52:31,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:52:31,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:52:31,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:52:31,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:52:31,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:52:31,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:52:31,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:52:31,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:52:31,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:52:31,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:52:31,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:52:31,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:52:31,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:52:31,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:52:31,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:52:31,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:52:31,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:52:31,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:52:31,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:52:31,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:52:31,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:52:31,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:52:31,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:52:31,143 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:52:31,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:52:31,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:52:31,196 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:52:31,196 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:52:31,197 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:52:31,197 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:52:31,197 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:52:31,197 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:52:31,204 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:52:31,204 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:52:31,205 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:52:31,206 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:52:31,206 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:52:31,206 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:52:31,207 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:52:31,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:52:31,208 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:52:31,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:52:31,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:52:31,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:52:31,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:52:31,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:52:31,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:52:31,209 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:52:31,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:52:31,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:52:31,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:52:31,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:52:31,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:52:31,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:52:31,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:52:31,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:52:31,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:52:31,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:52:31,214 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:52:31,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:52:31,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:52:31,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:52:31,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:52:31,215 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_98cc6382-49ab-4df2-bd9a-ed2dd407352b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a [2021-11-07 01:52:31,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:52:31,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:52:31,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:52:31,526 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:52:31,527 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:52:31,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2021-11-07 01:52:31,601 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/data/9817a0dd7/b79a90d5104348bfbb8a3b31d4b2258f/FLAGce05274c3 [2021-11-07 01:52:32,223 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:52:32,224 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2021-11-07 01:52:32,262 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/data/9817a0dd7/b79a90d5104348bfbb8a3b31d4b2258f/FLAGce05274c3 [2021-11-07 01:52:32,456 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/data/9817a0dd7/b79a90d5104348bfbb8a3b31d4b2258f [2021-11-07 01:52:32,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:52:32,460 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:52:32,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:32,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:52:32,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:52:32,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:32" (1/1) ... [2021-11-07 01:52:32,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c74dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:32, skipping insertion in model container [2021-11-07 01:52:32,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:32" (1/1) ... [2021-11-07 01:52:32,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:52:32,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:52:33,166 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_98cc6382-49ab-4df2-bd9a-ed2dd407352b/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2021-11-07 01:52:33,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:33,186 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:52:33,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@62a48395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:33, skipping insertion in model container [2021-11-07 01:52:33,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:33,188 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:52:33,190 INFO L168 Benchmark]: Toolchain (without parser) took 728.35 ms. Allocated memory is still 98.6 MB. Free memory was 76.6 MB in the beginning and 58.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:52:33,191 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory is still 73.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:52:33,193 INFO L168 Benchmark]: CACSL2BoogieTranslator took 714.68 ms. Allocated memory is still 98.6 MB. Free memory was 76.2 MB in the beginning and 58.6 MB in the end (delta: 17.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:52:33,195 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory is still 73.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 714.68 ms. Allocated memory is still 98.6 MB. Free memory was 76.2 MB in the beginning and 58.6 MB in the end (delta: 17.6 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: 745]: 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_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/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_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/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_98cc6382-49ab-4df2-bd9a-ed2dd407352b/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 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:52:35,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:52:35,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:52:35,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:52:35,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:52:35,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:52:35,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:52:35,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:52:35,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:52:35,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:52:35,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:52:35,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:52:35,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:52:35,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:52:35,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:52:35,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:52:35,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:52:35,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:52:35,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:52:35,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:52:35,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:52:35,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:52:35,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:52:35,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:52:35,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:52:35,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:52:35,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:52:35,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:52:35,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:52:35,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:52:35,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:52:35,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:52:35,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:52:35,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:52:35,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:52:35,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:52:35,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:52:35,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:52:35,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:52:35,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:52:35,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:52:35,680 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:52:35,725 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:52:35,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:52:35,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:52:35,728 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:52:35,728 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:52:35,728 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:52:35,729 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:52:35,729 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:52:35,729 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:52:35,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:52:35,732 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:52:35,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:52:35,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:52:35,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:52:35,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:52:35,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:52:35,734 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:52:35,735 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:52:35,735 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:52:35,735 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:52:35,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:52:35,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:52:35,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:52:35,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:52:35,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:52:35,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:52:35,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:52:35,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:52:35,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:52:35,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:52:35,739 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:52:35,739 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:35,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:52:35,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:52:35,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:52:35,741 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_98cc6382-49ab-4df2-bd9a-ed2dd407352b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a [2021-11-07 01:52:36,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:52:36,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:52:36,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:52:36,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:52:36,169 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:52:36,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2021-11-07 01:52:36,245 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/data/1fd9b3791/afeaff8a0c3643628a0708a9b9d2be1f/FLAG264b58812 [2021-11-07 01:52:36,953 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:52:36,955 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2021-11-07 01:52:36,982 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/data/1fd9b3791/afeaff8a0c3643628a0708a9b9d2be1f/FLAG264b58812 [2021-11-07 01:52:37,103 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/data/1fd9b3791/afeaff8a0c3643628a0708a9b9d2be1f [2021-11-07 01:52:37,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:52:37,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:52:37,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:37,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:52:37,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:52:37,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:37" (1/1) ... [2021-11-07 01:52:37,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38fec32a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:37, skipping insertion in model container [2021-11-07 01:52:37,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:37" (1/1) ... [2021-11-07 01:52:37,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:52:37,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:52:37,751 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_98cc6382-49ab-4df2-bd9a-ed2dd407352b/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2021-11-07 01:52:37,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:37,771 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:52:37,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:52:37,930 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_98cc6382-49ab-4df2-bd9a-ed2dd407352b/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2021-11-07 01:52:37,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:37,959 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:52:38,099 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_98cc6382-49ab-4df2-bd9a-ed2dd407352b/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2021-11-07 01:52:38,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:38,137 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:52:38,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:38 WrapperNode [2021-11-07 01:52:38,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:38,139 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:52:38,139 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:52:38,139 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:52:38,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:38" (1/1) ... [2021-11-07 01:52:38,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:38" (1/1) ... [2021-11-07 01:52:38,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:52:38,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:52:38,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:52:38,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:52:38,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:38" (1/1) ... [2021-11-07 01:52:38,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:38" (1/1) ... [2021-11-07 01:52:38,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:38" (1/1) ... [2021-11-07 01:52:38,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:38" (1/1) ... [2021-11-07 01:52:39,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:38" (1/1) ... [2021-11-07 01:52:39,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:38" (1/1) ... [2021-11-07 01:52:39,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:38" (1/1) ... [2021-11-07 01:52:39,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:52:39,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:52:39,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:52:39,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:52:39,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:38" (1/1) ... [2021-11-07 01:52:39,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:52:39,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:52:39,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:52:39,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:52:39,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:52:39,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:52:39,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:52:39,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:53:01,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:53:01,801 INFO L299 CfgBuilder]: Removed 2083 assume(true) statements. [2021-11-07 01:53:01,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:01 BoogieIcfgContainer [2021-11-07 01:53:01,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:53:01,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:53:01,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:53:01,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:53:01,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:52:37" (1/3) ... [2021-11-07 01:53:01,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba5878e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:01, skipping insertion in model container [2021-11-07 01:53:01,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:38" (2/3) ... [2021-11-07 01:53:01,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba5878e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:01, skipping insertion in model container [2021-11-07 01:53:01,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:01" (3/3) ... [2021-11-07 01:53:01,822 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product31.cil.c [2021-11-07 01:53:01,828 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:53:01,828 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:53:01,923 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:53:01,930 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:53:01,930 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:53:02,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 8857 states, 8851 states have (on average 1.8849847474861599) internal successors, (16684), 8856 states have internal predecessors, (16684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:53:02,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:02,141 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:02,142 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 01:53:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:02,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1907432599, now seen corresponding path program 1 times [2021-11-07 01:53:02,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:02,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800953714] [2021-11-07 01:53:02,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:02,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:02,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:02,169 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:02,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:53:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:02,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:53:02,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:02,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:02,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:02,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800953714] [2021-11-07 01:53:02,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800953714] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:02,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:02,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:53:02,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564156779] [2021-11-07 01:53:02,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:53:02,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:02,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:53:02,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:53:02,934 INFO L87 Difference]: Start difference. First operand has 8857 states, 8851 states have (on average 1.8849847474861599) internal successors, (16684), 8856 states have internal predecessors, (16684), 0 states have call successors, (0), 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 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:04,125 INFO L93 Difference]: Finished difference Result 24854 states and 46815 transitions. [2021-11-07 01:53:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:53:04,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:53:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:04,275 INFO L225 Difference]: With dead ends: 24854 [2021-11-07 01:53:04,276 INFO L226 Difference]: Without dead ends: 15997 [2021-11-07 01:53:04,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:53:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15997 states. [2021-11-07 01:53:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15997 to 8853. [2021-11-07 01:53:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8853 states, 8848 states have (on average 1.883363471971067) internal successors, (16664), 8852 states have internal predecessors, (16664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8853 states to 8853 states and 16664 transitions. [2021-11-07 01:53:04,830 INFO L78 Accepts]: Start accepts. Automaton has 8853 states and 16664 transitions. Word has length 44 [2021-11-07 01:53:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:04,830 INFO L470 AbstractCegarLoop]: Abstraction has 8853 states and 16664 transitions. [2021-11-07 01:53:04,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:04,831 INFO L276 IsEmpty]: Start isEmpty. Operand 8853 states and 16664 transitions. [2021-11-07 01:53:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:53:04,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:04,840 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:04,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:05,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:05,062 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 01:53:05,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:05,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1807660893, now seen corresponding path program 1 times [2021-11-07 01:53:05,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:05,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117367658] [2021-11-07 01:53:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:05,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:05,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:05,069 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:05,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:53:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:05,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:53:05,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:05,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:05,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:05,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117367658] [2021-11-07 01:53:05,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117367658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:05,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:05,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:53:05,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087053965] [2021-11-07 01:53:05,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:53:05,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:05,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:53:05,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:53:05,896 INFO L87 Difference]: Start difference. First operand 8853 states and 16664 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:07,753 INFO L93 Difference]: Finished difference Result 35377 states and 66581 transitions. [2021-11-07 01:53:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:53:07,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:53:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:07,874 INFO L225 Difference]: With dead ends: 35377 [2021-11-07 01:53:07,874 INFO L226 Difference]: Without dead ends: 26545 [2021-11-07 01:53:07,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 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 01:53:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26545 states. [2021-11-07 01:53:08,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26545 to 8831. [2021-11-07 01:53:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8831 states, 8826 states have (on average 1.8822796283707228) internal successors, (16613), 8830 states have internal predecessors, (16613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 16613 transitions. [2021-11-07 01:53:08,422 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 16613 transitions. Word has length 49 [2021-11-07 01:53:08,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:08,423 INFO L470 AbstractCegarLoop]: Abstraction has 8831 states and 16613 transitions. [2021-11-07 01:53:08,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 16613 transitions. [2021-11-07 01:53:08,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:53:08,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:08,435 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] [2021-11-07 01:53:08,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:08,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:08,651 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 01:53:08,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:08,652 INFO L85 PathProgramCache]: Analyzing trace with hash 176917373, now seen corresponding path program 1 times [2021-11-07 01:53:08,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:08,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227170703] [2021-11-07 01:53:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:08,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:08,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:08,658 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:08,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:53:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:53:09,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:09,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:09,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:09,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227170703] [2021-11-07 01:53:09,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227170703] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:09,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:09,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:53:09,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249135488] [2021-11-07 01:53:09,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:53:09,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:09,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:53:09,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:53:09,331 INFO L87 Difference]: Start difference. First operand 8831 states and 16613 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:10,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:10,198 INFO L93 Difference]: Finished difference Result 24713 states and 46503 transitions. [2021-11-07 01:53:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:53:10,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:53:10,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:10,252 INFO L225 Difference]: With dead ends: 24713 [2021-11-07 01:53:10,252 INFO L226 Difference]: Without dead ends: 15903 [2021-11-07 01:53:10,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:53:10,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15903 states. [2021-11-07 01:53:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15903 to 8831. [2021-11-07 01:53:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8831 states, 8826 states have (on average 1.8815998187174259) internal successors, (16607), 8830 states have internal predecessors, (16607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:10,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 16607 transitions. [2021-11-07 01:53:10,750 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 16607 transitions. Word has length 50 [2021-11-07 01:53:10,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:10,751 INFO L470 AbstractCegarLoop]: Abstraction has 8831 states and 16607 transitions. [2021-11-07 01:53:10,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:10,752 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 16607 transitions. [2021-11-07 01:53:10,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:53:10,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:10,755 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:10,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:10,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:10,970 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 01:53:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:10,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1772571914, now seen corresponding path program 1 times [2021-11-07 01:53:10,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:10,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310002751] [2021-11-07 01:53:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:10,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:10,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:10,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:10,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:53:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:11,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:53:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:11,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:11,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:11,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310002751] [2021-11-07 01:53:11,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310002751] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:11,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:11,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:53:11,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961591627] [2021-11-07 01:53:11,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:53:11,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:11,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:53:11,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:53:11,843 INFO L87 Difference]: Start difference. First operand 8831 states and 16607 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:14,457 INFO L93 Difference]: Finished difference Result 49460 states and 93056 transitions. [2021-11-07 01:53:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:53:14,458 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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 55 [2021-11-07 01:53:14,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:14,589 INFO L225 Difference]: With dead ends: 49460 [2021-11-07 01:53:14,589 INFO L226 Difference]: Without dead ends: 40653 [2021-11-07 01:53:14,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 102 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 01:53:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40653 states. [2021-11-07 01:53:15,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40653 to 8833. [2021-11-07 01:53:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8833 states, 8828 states have (on average 1.8808337109198006) internal successors, (16604), 8832 states have internal predecessors, (16604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8833 states to 8833 states and 16604 transitions. [2021-11-07 01:53:15,082 INFO L78 Accepts]: Start accepts. Automaton has 8833 states and 16604 transitions. Word has length 55 [2021-11-07 01:53:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:15,085 INFO L470 AbstractCegarLoop]: Abstraction has 8833 states and 16604 transitions. [2021-11-07 01:53:15,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 8833 states and 16604 transitions. [2021-11-07 01:53:15,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:53:15,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:15,089 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:15,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:15,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:15,307 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 01:53:15,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:15,307 INFO L85 PathProgramCache]: Analyzing trace with hash 709591484, now seen corresponding path program 1 times [2021-11-07 01:53:15,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:15,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663595335] [2021-11-07 01:53:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:15,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:15,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:15,312 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:15,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:53:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:15,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:53:15,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:16,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:16,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:16,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663595335] [2021-11-07 01:53:16,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663595335] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:16,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:16,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:53:16,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475862835] [2021-11-07 01:53:16,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:53:16,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:53:16,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:53:16,471 INFO L87 Difference]: Start difference. First operand 8833 states and 16604 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:24,494 INFO L93 Difference]: Finished difference Result 30117 states and 56704 transitions. [2021-11-07 01:53:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:53:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 01:53:24,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:24,548 INFO L225 Difference]: With dead ends: 30117 [2021-11-07 01:53:24,548 INFO L226 Difference]: Without dead ends: 21314 [2021-11-07 01:53:24,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:53:24,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21314 states. [2021-11-07 01:53:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21314 to 8833. [2021-11-07 01:53:25,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8833 states, 8828 states have (on average 1.814227458087902) internal successors, (16016), 8832 states have internal predecessors, (16016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8833 states to 8833 states and 16016 transitions. [2021-11-07 01:53:25,158 INFO L78 Accepts]: Start accepts. Automaton has 8833 states and 16016 transitions. Word has length 56 [2021-11-07 01:53:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:25,158 INFO L470 AbstractCegarLoop]: Abstraction has 8833 states and 16016 transitions. [2021-11-07 01:53:25,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 8833 states and 16016 transitions. [2021-11-07 01:53:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:53:25,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:25,164 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:25,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:25,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:25,380 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 01:53:25,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:25,381 INFO L85 PathProgramCache]: Analyzing trace with hash -988207610, now seen corresponding path program 1 times [2021-11-07 01:53:25,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:25,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156395181] [2021-11-07 01:53:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:25,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:25,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:25,384 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:25,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:53:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:25,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:53:25,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:26,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:26,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:26,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156395181] [2021-11-07 01:53:26,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156395181] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:26,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:26,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:53:26,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173834534] [2021-11-07 01:53:26,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:53:26,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:53:26,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:53:26,451 INFO L87 Difference]: Start difference. First operand 8833 states and 16016 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:33,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:33,750 INFO L93 Difference]: Finished difference Result 40650 states and 74890 transitions. [2021-11-07 01:53:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:53:33,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:53:33,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:33,843 INFO L225 Difference]: With dead ends: 40650 [2021-11-07 01:53:33,844 INFO L226 Difference]: Without dead ends: 31874 [2021-11-07 01:53:33,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:53:33,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31874 states. [2021-11-07 01:53:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31874 to 12229. [2021-11-07 01:53:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12229 states, 12224 states have (on average 1.814872382198953) internal successors, (22185), 12228 states have internal predecessors, (22185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:34,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12229 states to 12229 states and 22185 transitions. [2021-11-07 01:53:34,811 INFO L78 Accepts]: Start accepts. Automaton has 12229 states and 22185 transitions. Word has length 68 [2021-11-07 01:53:34,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:34,812 INFO L470 AbstractCegarLoop]: Abstraction has 12229 states and 22185 transitions. [2021-11-07 01:53:34,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 12229 states and 22185 transitions. [2021-11-07 01:53:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:53:34,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:34,816 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:34,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:35,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:35,029 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 01:53:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:35,030 INFO L85 PathProgramCache]: Analyzing trace with hash 720011917, now seen corresponding path program 1 times [2021-11-07 01:53:35,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:35,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832694413] [2021-11-07 01:53:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:35,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:35,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:35,032 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:35,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:53:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:35,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:53:35,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:35,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:37,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:37,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832694413] [2021-11-07 01:53:37,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832694413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:37,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:37,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:53:37,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167469694] [2021-11-07 01:53:37,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:53:37,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:53:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:53:37,406 INFO L87 Difference]: Start difference. First operand 12229 states and 22185 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:44,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:44,724 INFO L93 Difference]: Finished difference Result 45278 states and 82298 transitions. [2021-11-07 01:53:44,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:53:44,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:53:44,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:44,780 INFO L225 Difference]: With dead ends: 45278 [2021-11-07 01:53:44,780 INFO L226 Difference]: Without dead ends: 33098 [2021-11-07 01:53:44,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:53:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33098 states. [2021-11-07 01:53:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33098 to 19642. [2021-11-07 01:53:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19642 states, 19637 states have (on average 1.803686917553598) internal successors, (35419), 19641 states have internal predecessors, (35419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19642 states to 19642 states and 35419 transitions. [2021-11-07 01:53:45,772 INFO L78 Accepts]: Start accepts. Automaton has 19642 states and 35419 transitions. Word has length 71 [2021-11-07 01:53:45,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:45,772 INFO L470 AbstractCegarLoop]: Abstraction has 19642 states and 35419 transitions. [2021-11-07 01:53:45,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:45,773 INFO L276 IsEmpty]: Start isEmpty. Operand 19642 states and 35419 transitions. [2021-11-07 01:53:45,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:53:45,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:45,777 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:46,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:46,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:46,194 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 01:53:46,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:46,194 INFO L85 PathProgramCache]: Analyzing trace with hash -826667718, now seen corresponding path program 1 times [2021-11-07 01:53:46,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:46,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265772141] [2021-11-07 01:53:46,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:46,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:46,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:46,197 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:46,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:53:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:46,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:53:46,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:47,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:47,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:47,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265772141] [2021-11-07 01:53:47,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265772141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:47,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:47,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:53:47,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022219245] [2021-11-07 01:53:47,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:53:47,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:47,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:53:47,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:53:47,303 INFO L87 Difference]: Start difference. First operand 19642 states and 35419 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:58,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:58,862 INFO L93 Difference]: Finished difference Result 94793 states and 172385 transitions. [2021-11-07 01:53:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:53:58,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:53:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:58,995 INFO L225 Difference]: With dead ends: 94793 [2021-11-07 01:53:58,995 INFO L226 Difference]: Without dead ends: 75199 [2021-11-07 01:53:59,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:53:59,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75199 states. [2021-11-07 01:54:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75199 to 25514. [2021-11-07 01:54:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25514 states, 25509 states have (on average 1.8017562428946647) internal successors, (45961), 25513 states have internal predecessors, (45961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25514 states to 25514 states and 45961 transitions. [2021-11-07 01:54:00,549 INFO L78 Accepts]: Start accepts. Automaton has 25514 states and 45961 transitions. Word has length 72 [2021-11-07 01:54:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:00,549 INFO L470 AbstractCegarLoop]: Abstraction has 25514 states and 45961 transitions. [2021-11-07 01:54:00,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 25514 states and 45961 transitions. [2021-11-07 01:54:00,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:54:00,556 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:00,556 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:00,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:00,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:00,776 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 01:54:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1321821359, now seen corresponding path program 1 times [2021-11-07 01:54:00,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:00,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883055380] [2021-11-07 01:54:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:00,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:00,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:00,779 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:00,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:54:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:01,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:54:01,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:01,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:01,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:01,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883055380] [2021-11-07 01:54:01,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883055380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:01,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:01,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:01,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077162794] [2021-11-07 01:54:01,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:01,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:54:01,839 INFO L87 Difference]: Start difference. First operand 25514 states and 45961 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:13,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:13,533 INFO L93 Difference]: Finished difference Result 87262 states and 159307 transitions. [2021-11-07 01:54:13,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:54:13,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:54:13,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:13,635 INFO L225 Difference]: With dead ends: 87262 [2021-11-07 01:54:13,635 INFO L226 Difference]: Without dead ends: 61783 [2021-11-07 01:54:13,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:54:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61783 states. [2021-11-07 01:54:15,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61783 to 39970. [2021-11-07 01:54:15,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39970 states, 39965 states have (on average 1.7642186913549356) internal successors, (70507), 39969 states have internal predecessors, (70507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39970 states to 39970 states and 70507 transitions. [2021-11-07 01:54:15,804 INFO L78 Accepts]: Start accepts. Automaton has 39970 states and 70507 transitions. Word has length 73 [2021-11-07 01:54:15,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:15,805 INFO L470 AbstractCegarLoop]: Abstraction has 39970 states and 70507 transitions. [2021-11-07 01:54:15,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:15,805 INFO L276 IsEmpty]: Start isEmpty. Operand 39970 states and 70507 transitions. [2021-11-07 01:54:15,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:54:15,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:15,809 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:15,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:16,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:16,017 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 01:54:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:16,017 INFO L85 PathProgramCache]: Analyzing trace with hash 131131379, now seen corresponding path program 1 times [2021-11-07 01:54:16,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:16,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791999679] [2021-11-07 01:54:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:16,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:16,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:16,019 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:16,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:54:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:16,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:16,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:16,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:17,260 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:17,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791999679] [2021-11-07 01:54:17,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791999679] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:17,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:17,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:54:17,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213645794] [2021-11-07 01:54:17,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:17,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:17,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:17,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:17,263 INFO L87 Difference]: Start difference. First operand 39970 states and 70507 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:19,044 INFO L93 Difference]: Finished difference Result 69565 states and 121350 transitions. [2021-11-07 01:54:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:19,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:54:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:19,111 INFO L225 Difference]: With dead ends: 69565 [2021-11-07 01:54:19,111 INFO L226 Difference]: Without dead ends: 41179 [2021-11-07 01:54:19,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41179 states. [2021-11-07 01:54:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41179 to 41169. [2021-11-07 01:54:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41169 states, 41164 states have (on average 1.7552473034690506) internal successors, (72253), 41168 states have internal predecessors, (72253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41169 states to 41169 states and 72253 transitions. [2021-11-07 01:54:21,012 INFO L78 Accepts]: Start accepts. Automaton has 41169 states and 72253 transitions. Word has length 75 [2021-11-07 01:54:21,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:21,013 INFO L470 AbstractCegarLoop]: Abstraction has 41169 states and 72253 transitions. [2021-11-07 01:54:21,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:21,013 INFO L276 IsEmpty]: Start isEmpty. Operand 41169 states and 72253 transitions. [2021-11-07 01:54:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:54:21,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:21,017 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:21,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:21,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:21,222 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:54:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash -570468495, now seen corresponding path program 1 times [2021-11-07 01:54:21,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:21,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095387099] [2021-11-07 01:54:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:21,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:21,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:21,224 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:21,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:54:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:21,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:54:21,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:22,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:22,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:22,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095387099] [2021-11-07 01:54:22,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095387099] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:22,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:22,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:54:22,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012883642] [2021-11-07 01:54:22,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:22,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:22,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:22,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:22,367 INFO L87 Difference]: Start difference. First operand 41169 states and 72253 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:31,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:31,028 INFO L93 Difference]: Finished difference Result 101458 states and 180598 transitions. [2021-11-07 01:54:31,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:54:31,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:54:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:31,165 INFO L225 Difference]: With dead ends: 101458 [2021-11-07 01:54:31,165 INFO L226 Difference]: Without dead ends: 74928 [2021-11-07 01:54:31,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:54:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74928 states. [2021-11-07 01:54:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74928 to 41121. [2021-11-07 01:54:33,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41121 states, 41116 states have (on average 1.7549615721373675) internal successors, (72157), 41120 states have internal predecessors, (72157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41121 states to 41121 states and 72157 transitions. [2021-11-07 01:54:33,503 INFO L78 Accepts]: Start accepts. Automaton has 41121 states and 72157 transitions. Word has length 75 [2021-11-07 01:54:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:33,504 INFO L470 AbstractCegarLoop]: Abstraction has 41121 states and 72157 transitions. [2021-11-07 01:54:33,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 41121 states and 72157 transitions. [2021-11-07 01:54:33,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:54:33,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:33,507 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:33,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:33,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:33,708 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:54:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:33,708 INFO L85 PathProgramCache]: Analyzing trace with hash -878534529, now seen corresponding path program 1 times [2021-11-07 01:54:33,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:33,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361353167] [2021-11-07 01:54:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:33,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:33,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:33,710 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:33,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:54:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:34,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:34,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:34,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:34,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:34,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361353167] [2021-11-07 01:54:34,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361353167] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:34,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:34,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:54:34,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085995548] [2021-11-07 01:54:34,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:34,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:34,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:34,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:34,939 INFO L87 Difference]: Start difference. First operand 41121 states and 72157 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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 01:54:38,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:38,024 INFO L93 Difference]: Finished difference Result 98290 states and 172417 transitions. [2021-11-07 01:54:38,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:38,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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 81 [2021-11-07 01:54:38,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:38,130 INFO L225 Difference]: With dead ends: 98290 [2021-11-07 01:54:38,130 INFO L226 Difference]: Without dead ends: 64891 [2021-11-07 01:54:38,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64891 states. [2021-11-07 01:54:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64891 to 64881. [2021-11-07 01:54:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64881 states, 64876 states have (on average 1.761252235032986) internal successors, (114263), 64880 states have internal predecessors, (114263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64881 states to 64881 states and 114263 transitions. [2021-11-07 01:54:41,451 INFO L78 Accepts]: Start accepts. Automaton has 64881 states and 114263 transitions. Word has length 81 [2021-11-07 01:54:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:41,452 INFO L470 AbstractCegarLoop]: Abstraction has 64881 states and 114263 transitions. [2021-11-07 01:54:41,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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 01:54:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 64881 states and 114263 transitions. [2021-11-07 01:54:41,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:54:41,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:41,458 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] [2021-11-07 01:54:41,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:54:41,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:41,674 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:54:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:41,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1201963571, now seen corresponding path program 1 times [2021-11-07 01:54:41,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:41,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086410316] [2021-11-07 01:54:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:41,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:41,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:41,676 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:41,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cc6382-49ab-4df2-bd9a-ed2dd407352b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:54:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:42,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:42,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:42,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:42,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:42,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086410316] [2021-11-07 01:54:42,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086410316] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:42,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:42,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:54:42,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775670271] [2021-11-07 01:54:42,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:42,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:42,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:42,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:42,982 INFO L87 Difference]: Start difference. First operand 64881 states and 114263 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)