./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH --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 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:26:39,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:26:39,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:26:39,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:26:39,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:26:39,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:26:39,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:26:39,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:26:39,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:26:39,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:26:39,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:26:39,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:26:39,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:26:39,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:26:39,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:26:39,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:26:39,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:26:39,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:26:39,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:26:39,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:26:39,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:26:39,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:26:39,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:26:39,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:26:39,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:26:39,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:26:39,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:26:39,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:26:39,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:26:39,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:26:39,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:26:39,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:26:39,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:26:39,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:26:39,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:26:39,169 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:26:39,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:26:39,170 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:26:39,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:26:39,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:26:39,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:26:39,174 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:26:39,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:26:39,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:26:39,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:26:39,202 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:26:39,202 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:26:39,202 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:26:39,202 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:26:39,203 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:26:39,203 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:26:39,203 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:26:39,203 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:26:39,203 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:26:39,204 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:26:39,204 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:26:39,204 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:26:39,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:26:39,205 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:26:39,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:26:39,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:26:39,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:26:39,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:26:39,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:26:39,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:26:39,206 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:26:39,206 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:26:39,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:26:39,207 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:26:39,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:26:39,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:26:39,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:26:39,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:39,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:26:39,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:26:39,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:26:39,208 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:26:39,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:26:39,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:26:39,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:26:39,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:26:39,209 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_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd [2021-11-03 04:26:39,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:26:39,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:26:39,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:26:39,520 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:26:39,521 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:26:39,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-03 04:26:39,589 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/data/204402fc8/c6e3f65e4d8b4798b37c310d9b6def98/FLAGc4e8b561f [2021-11-03 04:26:40,180 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:26:40,181 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-03 04:26:40,208 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/data/204402fc8/c6e3f65e4d8b4798b37c310d9b6def98/FLAGc4e8b561f [2021-11-03 04:26:40,393 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/data/204402fc8/c6e3f65e4d8b4798b37c310d9b6def98 [2021-11-03 04:26:40,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:26:40,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:26:40,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:40,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:26:40,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:26:40,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:40" (1/1) ... [2021-11-03 04:26:40,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2006d65b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:40, skipping insertion in model container [2021-11-03 04:26:40,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:40" (1/1) ... [2021-11-03 04:26:40,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:26:40,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:26:40,919 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_b264711b-520e-4310-91d4-2f0c607435a0/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-03 04:26:40,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:40,957 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) [2021-11-03 04:26:40,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@51fe7ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:40, skipping insertion in model container [2021-11-03 04:26:40,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:40,958 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:26:40,960 INFO L168 Benchmark]: Toolchain (without parser) took 562.36 ms. Allocated memory is still 98.6 MB. Free memory was 58.3 MB in the beginning and 62.7 MB in the end (delta: -4.4 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:26:40,961 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 98.6 MB. Free memory is still 77.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:26:40,962 INFO L168 Benchmark]: CACSL2BoogieTranslator took 559.31 ms. Allocated memory is still 98.6 MB. Free memory was 58.1 MB in the beginning and 63.0 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:26:40,963 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 98.6 MB. Free memory is still 77.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 559.31 ms. Allocated memory is still 98.6 MB. Free memory was 58.1 MB in the beginning and 63.0 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: 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_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH --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 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:26:43,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:26:43,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:26:43,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:26:43,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:26:43,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:26:43,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:26:43,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:26:43,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:26:43,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:26:43,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:26:43,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:26:43,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:26:43,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:26:43,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:26:43,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:26:43,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:26:43,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:26:43,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:26:43,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:26:43,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:26:43,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:26:43,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:26:43,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:26:43,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:26:43,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:26:43,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:26:43,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:26:43,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:26:43,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:26:43,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:26:43,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:26:43,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:26:43,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:26:43,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:26:43,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:26:43,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:26:43,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:26:43,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:26:43,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:26:43,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:26:43,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:26:43,298 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:26:43,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:26:43,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:26:43,300 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:26:43,300 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:26:43,300 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:26:43,301 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:26:43,301 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:26:43,301 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:26:43,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:26:43,304 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:26:43,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:26:43,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:26:43,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:26:43,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:26:43,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:26:43,305 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:26:43,305 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:26:43,306 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:26:43,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:26:43,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:26:43,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:26:43,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:26:43,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:26:43,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:26:43,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:26:43,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:43,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:26:43,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:26:43,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:26:43,309 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:26:43,309 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:43,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:26:43,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:26:43,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:26:43,310 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_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd [2021-11-03 04:26:43,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:26:43,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:26:43,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:26:43,781 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:26:43,781 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:26:43,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-03 04:26:43,866 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/data/fe7d92391/4abfc438727e4753b4703daa9bcaa3e8/FLAGb12123d45 [2021-11-03 04:26:44,545 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:26:44,546 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-03 04:26:44,577 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/data/fe7d92391/4abfc438727e4753b4703daa9bcaa3e8/FLAGb12123d45 [2021-11-03 04:26:44,751 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/data/fe7d92391/4abfc438727e4753b4703daa9bcaa3e8 [2021-11-03 04:26:44,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:26:44,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:26:44,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:44,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:26:44,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:26:44,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:44" (1/1) ... [2021-11-03 04:26:44,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6600aa03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:44, skipping insertion in model container [2021-11-03 04:26:44,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:44" (1/1) ... [2021-11-03 04:26:44,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:26:44,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:26:45,454 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_b264711b-520e-4310-91d4-2f0c607435a0/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-03 04:26:45,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:45,503 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:26:45,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:26:45,625 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_b264711b-520e-4310-91d4-2f0c607435a0/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-03 04:26:45,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:45,634 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:26:45,747 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_b264711b-520e-4310-91d4-2f0c607435a0/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-03 04:26:45,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:45,781 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:26:45,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:45 WrapperNode [2021-11-03 04:26:45,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:45,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:26:45,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:26:45,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:26:45,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:45" (1/1) ... [2021-11-03 04:26:45,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:45" (1/1) ... [2021-11-03 04:26:45,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:26:45,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:26:45,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:26:45,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:26:45,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:45" (1/1) ... [2021-11-03 04:26:45,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:45" (1/1) ... [2021-11-03 04:26:45,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:45" (1/1) ... [2021-11-03 04:26:45,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:45" (1/1) ... [2021-11-03 04:26:46,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:45" (1/1) ... [2021-11-03 04:26:46,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:45" (1/1) ... [2021-11-03 04:26:46,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:45" (1/1) ... [2021-11-03 04:26:46,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:26:46,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:26:46,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:26:46,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:26:46,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:45" (1/1) ... [2021-11-03 04:26:46,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:46,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:46,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:26:46,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:26:46,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:26:46,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:26:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:26:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:26:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:26:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:26:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:26:46,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:26:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:26:46,419 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:26:57,380 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-03 04:26:57,380 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-03 04:26:57,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:26:57,388 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 04:26:57,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:26:57 BoogieIcfgContainer [2021-11-03 04:26:57,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:26:57,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:26:57,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:26:57,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:26:57,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:26:44" (1/3) ... [2021-11-03 04:26:57,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fb2eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:26:57, skipping insertion in model container [2021-11-03 04:26:57,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:45" (2/3) ... [2021-11-03 04:26:57,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fb2eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:26:57, skipping insertion in model container [2021-11-03 04:26:57,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:26:57" (3/3) ... [2021-11-03 04:26:57,399 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.10.i.cil-2.c [2021-11-03 04:26:57,404 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:26:57,404 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:26:57,451 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:26:57,457 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 [2021-11-03 04:26:57,458 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:26:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-03 04:26:57,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:57,484 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:57,484 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:26:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:57,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1692155939, now seen corresponding path program 1 times [2021-11-03 04:26:57,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:57,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619252789] [2021-11-03 04:26:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:57,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:57,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:57,511 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:57,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:26:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:57,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:26:57,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:58,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:26:58,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:26:58,146 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:58,150 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:26:58,160 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:58,163 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-03 04:26:58,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-03 04:26:58,661 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-03 04:26:58,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 717 treesize of output 669 [2021-11-03 04:26:58,735 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:58,738 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:26:58,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-03 04:26:58,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 101 [2021-11-03 04:26:58,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:58,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:26:59,010 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 04:26:59,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:26:59,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:59,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:59,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:59,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:59,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:59,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:59,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:59,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:59,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:26:59,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-03 04:26:59,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-03 04:26:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:59,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:59,455 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:59,461 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-03 04:26:59,468 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:59,475 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 04:26:59,654 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:59,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-03 04:26:59,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:59,667 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-03 04:26:59,704 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:59,708 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-03 04:26:59,731 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:59,735 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-03 04:26:59,759 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:59,763 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-03 04:26:59,795 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:59,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-03 04:27:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:00,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:00,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619252789] [2021-11-03 04:27:00,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619252789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:00,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:00,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:27:00,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110537877] [2021-11-03 04:27:00,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:27:00,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:00,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:27:00,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:27:00,404 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 0 states have call successors, (0), 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 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:22,888 INFO L93 Difference]: Finished difference Result 295 states and 495 transitions. [2021-11-03 04:27:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:27:22,891 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-03 04:27:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:22,900 INFO L225 Difference]: With dead ends: 295 [2021-11-03 04:27:22,900 INFO L226 Difference]: Without dead ends: 134 [2021-11-03 04:27:22,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:27:22,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-03 04:27:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-03 04:27:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.5263157894736843) internal successors, (203), 133 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 203 transitions. [2021-11-03 04:27:22,943 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 203 transitions. Word has length 43 [2021-11-03 04:27:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:22,943 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 203 transitions. [2021-11-03 04:27:22,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 203 transitions. [2021-11-03 04:27:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-03 04:27:22,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:22,946 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] [2021-11-03 04:27:22,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:23,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:23,161 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:27:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:23,162 INFO L85 PathProgramCache]: Analyzing trace with hash 2115802661, now seen corresponding path program 1 times [2021-11-03 04:27:23,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:23,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842423668] [2021-11-03 04:27:23,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:23,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:23,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:23,165 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:23,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:27:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:23,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:27:23,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:23,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:27:23,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:27:23,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:27:23,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:27:23,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:27:23,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:27:24,098 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:27:24,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:27:27,516 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:27:27,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:27:35,481 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:27:35,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:27:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:35,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:43,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:43,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842423668] [2021-11-03 04:27:43,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842423668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:43,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:43,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-03 04:27:43,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098622559] [2021-11-03 04:27:43,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:43,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:43,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:43,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-03 04:27:43,941 INFO L87 Difference]: Start difference. First operand 134 states and 203 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:15,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:15,239 INFO L93 Difference]: Finished difference Result 286 states and 434 transitions. [2021-11-03 04:28:15,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:28:15,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-03 04:28:15,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:15,243 INFO L225 Difference]: With dead ends: 286 [2021-11-03 04:28:15,243 INFO L226 Difference]: Without dead ends: 162 [2021-11-03 04:28:15,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=18, Invalid=21, Unknown=3, NotChecked=0, Total=42 [2021-11-03 04:28:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-03 04:28:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2021-11-03 04:28:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5416666666666667) internal successors, (222), 144 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 222 transitions. [2021-11-03 04:28:15,262 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 222 transitions. Word has length 43 [2021-11-03 04:28:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:15,263 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 222 transitions. [2021-11-03 04:28:15,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 222 transitions. [2021-11-03 04:28:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 04:28:15,266 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:15,266 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:15,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:15,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:15,469 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:28:15,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:15,470 INFO L85 PathProgramCache]: Analyzing trace with hash -964647941, now seen corresponding path program 1 times [2021-11-03 04:28:15,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:15,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466095481] [2021-11-03 04:28:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:15,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:15,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:15,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:15,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:28:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:16,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:28:16,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:16,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:16,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:16,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:16,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:28:16,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:28:16,524 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:28:16,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:28:19,774 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:28:19,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:28:27,384 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:28:27,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:28:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:27,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:27,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:27,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466095481] [2021-11-03 04:28:27,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466095481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:27,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:27,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:28:27,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588806721] [2021-11-03 04:28:27,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:28:27,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:27,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:28:27,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:28:27,923 INFO L87 Difference]: Start difference. First operand 145 states and 222 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:12,496 INFO L93 Difference]: Finished difference Result 417 states and 637 transitions. [2021-11-03 04:29:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:29:12,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-03 04:29:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:12,501 INFO L225 Difference]: With dead ends: 417 [2021-11-03 04:29:12,502 INFO L226 Difference]: Without dead ends: 293 [2021-11-03 04:29:12,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:29:12,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-03 04:29:12,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 174. [2021-11-03 04:29:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.5491329479768785) internal successors, (268), 173 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 268 transitions. [2021-11-03 04:29:12,523 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 268 transitions. Word has length 56 [2021-11-03 04:29:12,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:12,523 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 268 transitions. [2021-11-03 04:29:12,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 268 transitions. [2021-11-03 04:29:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 04:29:12,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:12,527 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:12,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:12,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:12,744 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:29:12,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:12,745 INFO L85 PathProgramCache]: Analyzing trace with hash 573692089, now seen corresponding path program 1 times [2021-11-03 04:29:12,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:12,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737527970] [2021-11-03 04:29:12,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:12,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:12,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:12,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:12,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:29:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:13,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:29:13,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:13,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:29:13,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:29:13,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:29:13,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:29:13,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:29:13,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:29:14,095 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:29:14,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:29:17,486 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:29:17,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:29:24,982 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:29:24,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:29:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:25,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:25,537 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:25,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737527970] [2021-11-03 04:29:25,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737527970] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:25,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:25,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:29:25,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621109122] [2021-11-03 04:29:25,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:29:25,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:25,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:29:25,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:29:25,540 INFO L87 Difference]: Start difference. First operand 174 states and 268 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:19,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:19,925 INFO L93 Difference]: Finished difference Result 449 states and 687 transitions. [2021-11-03 04:30:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:30:19,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-03 04:30:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:19,929 INFO L225 Difference]: With dead ends: 449 [2021-11-03 04:30:19,929 INFO L226 Difference]: Without dead ends: 309 [2021-11-03 04:30:19,930 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:30:19,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-03 04:30:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 161. [2021-11-03 04:30:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.54375) internal successors, (247), 160 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 247 transitions. [2021-11-03 04:30:19,945 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 247 transitions. Word has length 56 [2021-11-03 04:30:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:19,945 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 247 transitions. [2021-11-03 04:30:19,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:19,946 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 247 transitions. [2021-11-03 04:30:19,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 04:30:19,948 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:19,948 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:19,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:20,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:20,164 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:30:20,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:20,164 INFO L85 PathProgramCache]: Analyzing trace with hash 370114448, now seen corresponding path program 1 times [2021-11-03 04:30:20,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:20,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111825987] [2021-11-03 04:30:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:20,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:20,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:20,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:20,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:30:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:20,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:30:20,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:20,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:20,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:20,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:20,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:20,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:20,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:21,340 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:30:21,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:30:24,663 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:30:24,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:30:31,521 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:30:31,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:30:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:31,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:31,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:31,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111825987] [2021-11-03 04:30:31,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111825987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:31,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:31,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:30:31,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837548412] [2021-11-03 04:30:31,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:30:31,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:30:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:30:31,981 INFO L87 Difference]: Start difference. First operand 161 states and 247 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:08,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:08,471 INFO L93 Difference]: Finished difference Result 447 states and 686 transitions. [2021-11-03 04:31:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:31:08,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-03 04:31:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:08,475 INFO L225 Difference]: With dead ends: 447 [2021-11-03 04:31:08,475 INFO L226 Difference]: Without dead ends: 307 [2021-11-03 04:31:08,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:31:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-03 04:31:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 183. [2021-11-03 04:31:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.5274725274725274) internal successors, (278), 182 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 278 transitions. [2021-11-03 04:31:08,487 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 278 transitions. Word has length 57 [2021-11-03 04:31:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:08,488 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 278 transitions. [2021-11-03 04:31:08,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 278 transitions. [2021-11-03 04:31:08,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 04:31:08,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:08,491 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:08,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:08,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:08,701 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:31:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash -633507548, now seen corresponding path program 1 times [2021-11-03 04:31:08,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:08,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776682126] [2021-11-03 04:31:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:08,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:08,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:08,704 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:08,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:31:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:09,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:31:09,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:09,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:09,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:09,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:09,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:09,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:09,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:31:09,962 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:31:09,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:31:13,467 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:31:13,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:31:20,353 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:31:20,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:31:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:20,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:20,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:20,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776682126] [2021-11-03 04:31:20,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776682126] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:20,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:20,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:31:20,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214866738] [2021-11-03 04:31:20,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:31:20,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:20,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:31:20,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:31:20,820 INFO L87 Difference]: Start difference. First operand 183 states and 278 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2021-11-03 04:31:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:58,956 INFO L93 Difference]: Finished difference Result 469 states and 713 transitions. [2021-11-03 04:31:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:31:58,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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 57 [2021-11-03 04:31:58,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:58,960 INFO L225 Difference]: With dead ends: 469 [2021-11-03 04:31:58,960 INFO L226 Difference]: Without dead ends: 307 [2021-11-03 04:31:58,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:31:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-03 04:31:58,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 213. [2021-11-03 04:31:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.5141509433962264) internal successors, (321), 212 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 321 transitions. [2021-11-03 04:31:58,973 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 321 transitions. Word has length 57 [2021-11-03 04:31:58,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:58,973 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 321 transitions. [2021-11-03 04:31:58,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2021-11-03 04:31:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 321 transitions. [2021-11-03 04:31:58,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 04:31:58,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:58,976 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:58,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:59,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:59,189 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:31:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:59,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1501432389, now seen corresponding path program 1 times [2021-11-03 04:31:59,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:59,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557967877] [2021-11-03 04:31:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:59,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:59,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:59,191 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:59,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:31:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:59,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:31:59,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:59,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:59,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:59,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:59,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:59,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:59,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:32:00,238 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:32:00,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:32:03,569 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:32:03,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:32:11,084 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:32:11,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:32:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:11,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:11,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:11,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557967877] [2021-11-03 04:32:11,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557967877] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:11,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:11,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:32:11,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124971682] [2021-11-03 04:32:11,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:32:11,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:11,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:32:11,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:32:11,612 INFO L87 Difference]: Start difference. First operand 213 states and 321 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2021-11-03 04:32:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:57,467 INFO L93 Difference]: Finished difference Result 544 states and 820 transitions. [2021-11-03 04:32:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:32:57,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 57 [2021-11-03 04:32:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:57,472 INFO L225 Difference]: With dead ends: 544 [2021-11-03 04:32:57,472 INFO L226 Difference]: Without dead ends: 352 [2021-11-03 04:32:57,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:32:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-03 04:32:57,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 247. [2021-11-03 04:32:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.532520325203252) internal successors, (377), 246 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 377 transitions. [2021-11-03 04:32:57,507 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 377 transitions. Word has length 57 [2021-11-03 04:32:57,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:57,507 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 377 transitions. [2021-11-03 04:32:57,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2021-11-03 04:32:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 377 transitions. [2021-11-03 04:32:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 04:32:57,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:57,509 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:57,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:57,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:57,725 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:57,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:57,726 INFO L85 PathProgramCache]: Analyzing trace with hash -766087557, now seen corresponding path program 1 times [2021-11-03 04:32:57,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:57,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41139129] [2021-11-03 04:32:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:57,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:57,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:57,728 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:57,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:32:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:58,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:32:58,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:58,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:58,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:58,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:58,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:58,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:58,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:32:59,164 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:32:59,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:33:02,745 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:33:02,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:33:10,254 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:33:10,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:33:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:10,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:10,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:10,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41139129] [2021-11-03 04:33:10,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41139129] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:10,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:10,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:33:10,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707466687] [2021-11-03 04:33:10,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:33:10,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:10,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:33:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:33:10,783 INFO L87 Difference]: Start difference. First operand 247 states and 377 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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) [2021-11-03 04:33:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:46,412 INFO L93 Difference]: Finished difference Result 627 states and 961 transitions. [2021-11-03 04:33:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:33:46,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 57 [2021-11-03 04:33:46,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:46,418 INFO L225 Difference]: With dead ends: 627 [2021-11-03 04:33:46,418 INFO L226 Difference]: Without dead ends: 401 [2021-11-03 04:33:46,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:33:46,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-03 04:33:46,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 265. [2021-11-03 04:33:46,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.5227272727272727) internal successors, (402), 264 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2021-11-03 04:33:46,436 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 57 [2021-11-03 04:33:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:46,436 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2021-11-03 04:33:46,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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) [2021-11-03 04:33:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2021-11-03 04:33:46,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:33:46,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:46,438 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:33:46,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:46,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:46,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:46,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:46,659 INFO L85 PathProgramCache]: Analyzing trace with hash 471915876, now seen corresponding path program 1 times [2021-11-03 04:33:46,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:46,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125001409] [2021-11-03 04:33:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:46,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:46,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:46,663 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:46,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:33:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:48,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:33:48,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:48,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:48,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:48,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:48,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:48,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:48,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:33:48,491 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:33:48,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:33:52,065 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:33:52,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:33:59,125 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:33:59,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:33:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:59,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:59,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:59,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125001409] [2021-11-03 04:33:59,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125001409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:59,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:59,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:33:59,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110667757] [2021-11-03 04:33:59,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:33:59,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:59,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:33:59,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:33:59,668 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:31,480 INFO L93 Difference]: Finished difference Result 640 states and 978 transitions. [2021-11-03 04:34:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:34:31,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 04:34:31,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:31,484 INFO L225 Difference]: With dead ends: 640 [2021-11-03 04:34:31,485 INFO L226 Difference]: Without dead ends: 396 [2021-11-03 04:34:31,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:34:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-03 04:34:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 278. [2021-11-03 04:34:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.5018050541516246) internal successors, (416), 277 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 416 transitions. [2021-11-03 04:34:31,498 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 416 transitions. Word has length 58 [2021-11-03 04:34:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:31,498 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 416 transitions. [2021-11-03 04:34:31,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 416 transitions. [2021-11-03 04:34:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:34:31,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:31,500 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:31,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:31,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:31,714 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:31,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:31,715 INFO L85 PathProgramCache]: Analyzing trace with hash 466535849, now seen corresponding path program 1 times [2021-11-03 04:34:31,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:31,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492282111] [2021-11-03 04:34:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:31,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:31,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:31,722 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:31,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:34:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:32,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:34:32,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:32,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:32,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:32,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:32,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:32,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:32,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:32,970 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:34:32,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:34:36,087 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:34:36,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:34:43,057 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:34:43,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:34:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:43,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:43,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:43,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492282111] [2021-11-03 04:34:43,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492282111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:43,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:43,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:34:43,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907651887] [2021-11-03 04:34:43,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:34:43,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:43,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:34:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:34:43,535 INFO L87 Difference]: Start difference. First operand 278 states and 416 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:29,083 INFO L93 Difference]: Finished difference Result 653 states and 987 transitions. [2021-11-03 04:35:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:35:29,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:35:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:29,086 INFO L225 Difference]: With dead ends: 653 [2021-11-03 04:35:29,086 INFO L226 Difference]: Without dead ends: 396 [2021-11-03 04:35:29,087 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:35:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-03 04:35:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 279. [2021-11-03 04:35:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.4820143884892085) internal successors, (412), 278 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 412 transitions. [2021-11-03 04:35:29,100 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 412 transitions. Word has length 59 [2021-11-03 04:35:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:29,101 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 412 transitions. [2021-11-03 04:35:29,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:29,101 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 412 transitions. [2021-11-03 04:35:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:35:29,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:29,102 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:29,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:29,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:35:29,317 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:29,318 INFO L85 PathProgramCache]: Analyzing trace with hash 385987209, now seen corresponding path program 1 times [2021-11-03 04:35:29,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:35:29,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997862918] [2021-11-03 04:35:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:29,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:35:29,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:35:29,319 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:35:29,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:35:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:30,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:35:30,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:30,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:30,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:30,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:30,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:30,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:30,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:30,656 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:35:30,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:35:33,918 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:35:33,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:35:40,939 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:35:40,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:35:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:41,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:41,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:35:41,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997862918] [2021-11-03 04:35:41,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997862918] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:41,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:41,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:35:41,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978069668] [2021-11-03 04:35:41,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:35:41,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:35:41,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:35:41,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:35:41,426 INFO L87 Difference]: Start difference. First operand 279 states and 412 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2021-11-03 04:36:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:23,701 INFO L93 Difference]: Finished difference Result 637 states and 951 transitions. [2021-11-03 04:36:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:36:23,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 60 [2021-11-03 04:36:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:23,704 INFO L225 Difference]: With dead ends: 637 [2021-11-03 04:36:23,704 INFO L226 Difference]: Without dead ends: 379 [2021-11-03 04:36:23,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:36:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-03 04:36:23,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 276. [2021-11-03 04:36:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.4654545454545456) internal successors, (403), 275 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 403 transitions. [2021-11-03 04:36:23,717 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 403 transitions. Word has length 60 [2021-11-03 04:36:23,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:23,718 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 403 transitions. [2021-11-03 04:36:23,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2021-11-03 04:36:23,718 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 403 transitions. [2021-11-03 04:36:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:36:23,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:23,719 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:23,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-03 04:36:23,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:36:23,936 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:23,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:23,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1516075505, now seen corresponding path program 1 times [2021-11-03 04:36:23,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:36:23,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566800140] [2021-11-03 04:36:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:23,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:36:23,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:36:23,939 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:36:23,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:36:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:24,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:36:24,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:24,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:24,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:24,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:24,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:24,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:24,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:24,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:24,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:24,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:24,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:24,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:24,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:24,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:24,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:24,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:24,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:24,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:24,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:25,254 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:36:25,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 04:36:26,258 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:36:26,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 04:36:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:26,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:26,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:36:26,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566800140] [2021-11-03 04:36:26,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566800140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:26,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:26,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:36:26,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354838784] [2021-11-03 04:36:26,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:36:26,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:36:26,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:36:26,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:36:26,589 INFO L87 Difference]: Start difference. First operand 276 states and 403 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:40,585 INFO L93 Difference]: Finished difference Result 560 states and 823 transitions. [2021-11-03 04:36:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:36:40,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:36:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:40,592 INFO L225 Difference]: With dead ends: 560 [2021-11-03 04:36:40,592 INFO L226 Difference]: Without dead ends: 305 [2021-11-03 04:36:40,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:36:40,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-03 04:36:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 298. [2021-11-03 04:36:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.4579124579124578) internal successors, (433), 297 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 433 transitions. [2021-11-03 04:36:40,606 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 433 transitions. Word has length 60 [2021-11-03 04:36:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:40,606 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 433 transitions. [2021-11-03 04:36:40,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 433 transitions. [2021-11-03 04:36:40,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 04:36:40,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:40,608 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:40,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:40,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:36:40,825 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:40,826 INFO L85 PathProgramCache]: Analyzing trace with hash 340073590, now seen corresponding path program 1 times [2021-11-03 04:36:40,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:36:40,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551954639] [2021-11-03 04:36:40,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:40,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:36:40,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:36:40,827 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:36:40,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:36:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:41,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:36:41,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:41,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:41,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:41,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:41,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:41,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:41,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:42,073 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:36:42,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:36:42,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:42,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:42,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:42,416 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:36:42,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:36:44,475 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:36:44,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:36:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:36:44,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:36:44,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:36:44,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551954639] [2021-11-03 04:36:44,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551954639] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:44,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:44,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:36:44,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626815359] [2021-11-03 04:36:44,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:36:44,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:36:44,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:36:44,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:36:44,881 INFO L87 Difference]: Start difference. First operand 298 states and 433 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:11,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:37:11,376 INFO L93 Difference]: Finished difference Result 813 states and 1202 transitions. [2021-11-03 04:37:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:37:11,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-03 04:37:11,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:37:11,381 INFO L225 Difference]: With dead ends: 813 [2021-11-03 04:37:11,381 INFO L226 Difference]: Without dead ends: 536 [2021-11-03 04:37:11,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:37:11,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-03 04:37:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 366. [2021-11-03 04:37:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.5013698630136987) internal successors, (548), 365 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 548 transitions. [2021-11-03 04:37:11,407 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 548 transitions. Word has length 82 [2021-11-03 04:37:11,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:37:11,408 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 548 transitions. [2021-11-03 04:37:11,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 548 transitions. [2021-11-03 04:37:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 04:37:11,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:37:11,409 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:37:11,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:11,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:37:11,609 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:37:11,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:37:11,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1945814063, now seen corresponding path program 1 times [2021-11-03 04:37:11,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:37:11,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758074655] [2021-11-03 04:37:11,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:37:11,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:37:11,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:37:11,611 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:37:11,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:37:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:37:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:37:12,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:12,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:12,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:12,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:12,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:12,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:12,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:12,954 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:37:12,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:37:13,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:13,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:13,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:13,305 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:37:13,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:37:15,430 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:37:15,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:37:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:37:15,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:37:15,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:37:15,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758074655] [2021-11-03 04:37:15,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758074655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:37:15,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:37:15,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:37:15,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559334010] [2021-11-03 04:37:15,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:37:15,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:37:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:37:15,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:37:15,888 INFO L87 Difference]: Start difference. First operand 366 states and 548 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:37:51,558 INFO L93 Difference]: Finished difference Result 880 states and 1321 transitions. [2021-11-03 04:37:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:37:51,561 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 04:37:51,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:37:51,563 INFO L225 Difference]: With dead ends: 880 [2021-11-03 04:37:51,563 INFO L226 Difference]: Without dead ends: 535 [2021-11-03 04:37:51,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:37:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-03 04:37:51,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 375. [2021-11-03 04:37:51,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.5106951871657754) internal successors, (565), 374 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 565 transitions. [2021-11-03 04:37:51,579 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 565 transitions. Word has length 83 [2021-11-03 04:37:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:37:51,579 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 565 transitions. [2021-11-03 04:37:51,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:51,580 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 565 transitions. [2021-11-03 04:37:51,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-03 04:37:51,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:37:51,582 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:37:51,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:51,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:37:51,798 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:37:51,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:37:51,799 INFO L85 PathProgramCache]: Analyzing trace with hash -794443931, now seen corresponding path program 1 times [2021-11-03 04:37:51,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:37:51,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195711592] [2021-11-03 04:37:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:37:51,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:37:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:37:51,801 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:37:51,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:37:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:37:53,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:37:53,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:53,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:53,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:53,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:53,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:53,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:53,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:53,285 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:37:53,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:37:53,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:53,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:53,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:53,635 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:37:53,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:37:55,286 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:37:55,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:37:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:37:55,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:37:55,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:37:55,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195711592] [2021-11-03 04:37:55,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195711592] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:37:55,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:37:55,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:37:55,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243578471] [2021-11-03 04:37:55,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:37:55,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:37:55,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:37:55,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:37:55,901 INFO L87 Difference]: Start difference. First operand 375 states and 565 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:38:21,371 INFO L93 Difference]: Finished difference Result 935 states and 1419 transitions. [2021-11-03 04:38:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:38:21,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 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 111 [2021-11-03 04:38:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:38:21,375 INFO L225 Difference]: With dead ends: 935 [2021-11-03 04:38:21,375 INFO L226 Difference]: Without dead ends: 581 [2021-11-03 04:38:21,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:38:21,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-03 04:38:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 425. [2021-11-03 04:38:21,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.5235849056603774) internal successors, (646), 424 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:21,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 646 transitions. [2021-11-03 04:38:21,394 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 646 transitions. Word has length 111 [2021-11-03 04:38:21,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:38:21,395 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 646 transitions. [2021-11-03 04:38:21,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:21,395 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 646 transitions. [2021-11-03 04:38:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-03 04:38:21,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:38:21,397 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:38:21,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:38:21,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:38:21,617 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:38:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:38:21,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1179895462, now seen corresponding path program 1 times [2021-11-03 04:38:21,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:38:21,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000590053] [2021-11-03 04:38:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:21,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:38:21,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:38:21,620 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:38:21,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:38:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:23,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:38:23,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:23,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:23,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:23,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:23,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:23,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:23,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:23,226 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:38:23,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:38:23,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:23,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:23,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:23,624 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:38:23,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:38:25,668 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:38:25,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:38:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:38:25,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:38:26,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:38:26,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000590053] [2021-11-03 04:38:26,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000590053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:38:26,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:38:26,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:38:26,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403332057] [2021-11-03 04:38:26,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:38:26,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:38:26,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:38:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:38:26,277 INFO L87 Difference]: Start difference. First operand 425 states and 646 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:51,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:38:51,082 INFO L93 Difference]: Finished difference Result 1028 states and 1559 transitions. [2021-11-03 04:38:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:38:51,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 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 116 [2021-11-03 04:38:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:38:51,086 INFO L225 Difference]: With dead ends: 1028 [2021-11-03 04:38:51,086 INFO L226 Difference]: Without dead ends: 624 [2021-11-03 04:38:51,087 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:38:51,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-11-03 04:38:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 462. [2021-11-03 04:38:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.527114967462039) internal successors, (704), 461 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 704 transitions. [2021-11-03 04:38:51,105 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 704 transitions. Word has length 116 [2021-11-03 04:38:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:38:51,106 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 704 transitions. [2021-11-03 04:38:51,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 704 transitions. [2021-11-03 04:38:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-03 04:38:51,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:38:51,108 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:38:51,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:38:51,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:38:51,324 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:38:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:38:51,324 INFO L85 PathProgramCache]: Analyzing trace with hash -801583245, now seen corresponding path program 1 times [2021-11-03 04:38:51,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:38:51,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641777447] [2021-11-03 04:38:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:51,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:38:51,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:38:51,326 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:38:51,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:38:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:52,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:38:52,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:52,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:52,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:52,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:52,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:52,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:52,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:52,964 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:38:52,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:38:53,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:53,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:53,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:53,298 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:38:53,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:38:55,209 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:38:55,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:38:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:38:55,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:38:55,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:38:55,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641777447] [2021-11-03 04:38:55,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641777447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:38:55,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:38:55,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:38:55,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214639579] [2021-11-03 04:38:55,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:38:55,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:38:55,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:38:55,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:38:55,792 INFO L87 Difference]: Start difference. First operand 462 states and 704 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:30,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:30,514 INFO L93 Difference]: Finished difference Result 1058 states and 1606 transitions. [2021-11-03 04:39:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:39:30,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 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 117 [2021-11-03 04:39:30,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:30,521 INFO L225 Difference]: With dead ends: 1058 [2021-11-03 04:39:30,521 INFO L226 Difference]: Without dead ends: 617 [2021-11-03 04:39:30,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:39:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-03 04:39:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 462. [2021-11-03 04:39:30,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.5227765726681128) internal successors, (702), 461 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 702 transitions. [2021-11-03 04:39:30,542 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 702 transitions. Word has length 117 [2021-11-03 04:39:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:30,542 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 702 transitions. [2021-11-03 04:39:30,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 702 transitions. [2021-11-03 04:39:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-03 04:39:30,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:30,545 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:39:30,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:30,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:30,761 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:30,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2033381055, now seen corresponding path program 1 times [2021-11-03 04:39:30,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:30,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268562805] [2021-11-03 04:39:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:30,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:30,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:30,764 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:30,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:39:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:32,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:39:32,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:39:32,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:39:32,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:32,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268562805] [2021-11-03 04:39:32,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268562805] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:32,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:32,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:39:32,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496704616] [2021-11-03 04:39:32,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:32,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:32,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:32,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:32,662 INFO L87 Difference]: Start difference. First operand 462 states and 702 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:33,093 INFO L93 Difference]: Finished difference Result 1725 states and 2641 transitions. [2021-11-03 04:39:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:33,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 125 [2021-11-03 04:39:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:33,100 INFO L225 Difference]: With dead ends: 1725 [2021-11-03 04:39:33,100 INFO L226 Difference]: Without dead ends: 1284 [2021-11-03 04:39:33,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:39:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-11-03 04:39:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1278. [2021-11-03 04:39:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 1.5277995301487861) internal successors, (1951), 1277 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1951 transitions. [2021-11-03 04:39:33,155 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1951 transitions. Word has length 125 [2021-11-03 04:39:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:33,155 INFO L470 AbstractCegarLoop]: Abstraction has 1278 states and 1951 transitions. [2021-11-03 04:39:33,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1951 transitions. [2021-11-03 04:39:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-03 04:39:33,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:33,159 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:39:33,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:33,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:33,373 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:33,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:33,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2053704705, now seen corresponding path program 1 times [2021-11-03 04:39:33,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:33,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276234713] [2021-11-03 04:39:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:33,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:33,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:33,375 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:33,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:39:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:35,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:39:35,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:35,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:35,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:35,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:35,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:35,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:35,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:35,185 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:39:35,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:39:35,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:35,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:35,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:35,501 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:39:35,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:39:37,578 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:39:37,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:39:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:39:37,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:39:38,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:38,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276234713] [2021-11-03 04:39:38,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276234713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:38,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:38,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-03 04:39:38,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707644455] [2021-11-03 04:39:38,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:39:38,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:38,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:39:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:39:38,862 INFO L87 Difference]: Start difference. First operand 1278 states and 1951 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:54,078 INFO L93 Difference]: Finished difference Result 2755 states and 4198 transitions. [2021-11-03 04:39:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:39:54,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 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 126 [2021-11-03 04:39:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:54,088 INFO L225 Difference]: With dead ends: 2755 [2021-11-03 04:39:54,088 INFO L226 Difference]: Without dead ends: 1498 [2021-11-03 04:39:54,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:39:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-11-03 04:39:54,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1405. [2021-11-03 04:39:54,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 1.5270655270655271) internal successors, (2144), 1404 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:54,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2144 transitions. [2021-11-03 04:39:54,156 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2144 transitions. Word has length 126 [2021-11-03 04:39:54,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:54,156 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 2144 transitions. [2021-11-03 04:39:54,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:54,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2144 transitions. [2021-11-03 04:39:54,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-03 04:39:54,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:54,160 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:39:54,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:54,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:54,374 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:54,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:54,375 INFO L85 PathProgramCache]: Analyzing trace with hash -916406397, now seen corresponding path program 1 times [2021-11-03 04:39:54,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:54,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351512264] [2021-11-03 04:39:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:54,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:54,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:54,376 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:54,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:39:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:56,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:39:56,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:56,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:56,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:56,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:56,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:56,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:56,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:56,423 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:39:56,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-03 04:39:56,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:56,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:56,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:56,745 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:39:56,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-03 04:39:57,864 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:39:57,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-03 04:39:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 04:39:58,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 04:39:58,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:58,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351512264] [2021-11-03 04:39:58,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351512264] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:58,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:58,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-03 04:39:58,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853134829] [2021-11-03 04:39:58,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:39:58,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:58,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:39:58,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:39:58,710 INFO L87 Difference]: Start difference. First operand 1405 states and 2144 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:08,776 INFO L93 Difference]: Finished difference Result 2897 states and 4415 transitions. [2021-11-03 04:40:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:40:08,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-03 04:40:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:08,783 INFO L225 Difference]: With dead ends: 2897 [2021-11-03 04:40:08,783 INFO L226 Difference]: Without dead ends: 1513 [2021-11-03 04:40:08,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:40:08,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-11-03 04:40:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1477. [2021-11-03 04:40:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 1.521680216802168) internal successors, (2246), 1476 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2246 transitions. [2021-11-03 04:40:08,846 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2246 transitions. Word has length 126 [2021-11-03 04:40:08,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:08,847 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 2246 transitions. [2021-11-03 04:40:08,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:08,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2246 transitions. [2021-11-03 04:40:08,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-03 04:40:08,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:08,851 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:40:08,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:40:09,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:09,073 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:40:09,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:09,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1708257580, now seen corresponding path program 1 times [2021-11-03 04:40:09,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:09,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803510520] [2021-11-03 04:40:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:09,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:09,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:09,075 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:09,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:40:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:11,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:40:11,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:11,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:11,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:11,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:11,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:11,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:11,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:11,274 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:40:11,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:40:11,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:11,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:11,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:11,663 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:40:11,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:40:13,272 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:40:13,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:40:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:40:13,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:40:13,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:13,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803510520] [2021-11-03 04:40:13,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803510520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:13,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:13,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:40:13,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187013761] [2021-11-03 04:40:13,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:40:13,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:13,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:40:13,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:40:13,899 INFO L87 Difference]: Start difference. First operand 1477 states and 2246 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:37,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:37,016 INFO L93 Difference]: Finished difference Result 3362 states and 5070 transitions. [2021-11-03 04:40:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:40:37,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 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 138 [2021-11-03 04:40:37,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:37,028 INFO L225 Difference]: With dead ends: 3362 [2021-11-03 04:40:37,028 INFO L226 Difference]: Without dead ends: 1906 [2021-11-03 04:40:37,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:40:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-11-03 04:40:37,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1567. [2021-11-03 04:40:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 1.5114942528735633) internal successors, (2367), 1566 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 2367 transitions. [2021-11-03 04:40:37,113 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 2367 transitions. Word has length 138 [2021-11-03 04:40:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:37,114 INFO L470 AbstractCegarLoop]: Abstraction has 1567 states and 2367 transitions. [2021-11-03 04:40:37,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 2367 transitions. [2021-11-03 04:40:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-03 04:40:37,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:37,135 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:40:37,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:40:37,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:37,349 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:40:37,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:37,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1054534706, now seen corresponding path program 1 times [2021-11-03 04:40:37,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:37,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23117493] [2021-11-03 04:40:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:37,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:37,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:37,351 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:37,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:40:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:39,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:40:39,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:39,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:39,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:39,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:39,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:39,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:39,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:39,668 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:40:39,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:40:39,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:39,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:39,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:39,982 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:40:39,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:40:41,453 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:40:41,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:40:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:40:41,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:40:42,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:42,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23117493] [2021-11-03 04:40:42,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23117493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:42,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:42,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:40:42,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553694823] [2021-11-03 04:40:42,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:40:42,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:42,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:40:42,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:40:42,117 INFO L87 Difference]: Start difference. First operand 1567 states and 2367 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:41:16,491 INFO L93 Difference]: Finished difference Result 3404 states and 5108 transitions. [2021-11-03 04:41:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:41:16,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-03 04:41:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:41:16,500 INFO L225 Difference]: With dead ends: 3404 [2021-11-03 04:41:16,501 INFO L226 Difference]: Without dead ends: 1858 [2021-11-03 04:41:16,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:41:16,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-11-03 04:41:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1528. [2021-11-03 04:41:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 1.489849377865095) internal successors, (2275), 1527 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 2275 transitions. [2021-11-03 04:41:16,567 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 2275 transitions. Word has length 139 [2021-11-03 04:41:16,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:41:16,567 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 2275 transitions. [2021-11-03 04:41:16,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:16,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 2275 transitions. [2021-11-03 04:41:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-03 04:41:16,571 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:41:16,571 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:41:16,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:41:16,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:41:16,792 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:41:16,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:41:16,792 INFO L85 PathProgramCache]: Analyzing trace with hash 536372633, now seen corresponding path program 1 times [2021-11-03 04:41:16,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:41:16,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308733379] [2021-11-03 04:41:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:41:16,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:41:16,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:41:16,795 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:41:16,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:41:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:41:19,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:41:19,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:41:19,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:19,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:19,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:19,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:19,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:19,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:19,189 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:41:19,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:41:19,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:19,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:19,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:19,504 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:41:19,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:41:20,819 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:41:20,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:41:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:41:21,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:41:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:41:21,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:41:21,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308733379] [2021-11-03 04:41:21,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308733379] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:41:21,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:41:21,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:41:21,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536208082] [2021-11-03 04:41:21,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:41:21,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:41:21,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:41:21,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:41:21,463 INFO L87 Difference]: Start difference. First operand 1528 states and 2275 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:41:47,712 INFO L93 Difference]: Finished difference Result 3446 states and 5104 transitions. [2021-11-03 04:41:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:41:47,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 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 141 [2021-11-03 04:41:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:41:47,721 INFO L225 Difference]: With dead ends: 3446 [2021-11-03 04:41:47,722 INFO L226 Difference]: Without dead ends: 1939 [2021-11-03 04:41:47,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:41:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2021-11-03 04:41:47,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1612. [2021-11-03 04:41:47,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 1.4798261949099938) internal successors, (2384), 1611 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:47,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2384 transitions. [2021-11-03 04:41:47,799 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2384 transitions. Word has length 141 [2021-11-03 04:41:47,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:41:47,799 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 2384 transitions. [2021-11-03 04:41:47,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:47,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2384 transitions. [2021-11-03 04:41:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-03 04:41:47,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:41:47,803 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:41:47,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:41:48,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:41:48,025 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:41:48,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:41:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash 565975067, now seen corresponding path program 1 times [2021-11-03 04:41:48,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:41:48,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355638138] [2021-11-03 04:41:48,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:41:48,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:41:48,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:41:48,028 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:41:48,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b264711b-520e-4310-91d4-2f0c607435a0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:41:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:41:50,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:41:50,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:41:50,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:50,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:50,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:50,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:50,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:50,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:50,579 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:41:50,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:41:50,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:50,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:50,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:50,889 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:41:50,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:41:52,247 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:41:52,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:41:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:41:52,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:41:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:41:52,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:41:52,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355638138] [2021-11-03 04:41:52,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355638138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:41:52,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:41:52,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:41:52,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222513236] [2021-11-03 04:41:52,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:41:52,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:41:52,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:41:52,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:41:52,906 INFO L87 Difference]: Start difference. First operand 1612 states and 2384 transitions. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)