./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0219.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0219.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d0a821c00018fd0a7d1057c117e3e5b172a3096a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0219.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d0a821c00018fd0a7d1057c117e3e5b172a3096a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:10:38,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:10:38,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:10:38,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:10:38,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:10:38,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:10:38,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:10:38,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:10:38,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:10:38,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:10:38,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:10:38,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:10:38,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:10:38,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:10:38,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:10:38,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:10:38,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:10:38,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:10:38,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:10:38,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:10:38,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:10:38,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:10:38,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:10:38,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:10:38,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:10:38,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:10:38,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:10:38,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:10:38,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:10:38,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:10:38,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:10:38,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:10:38,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:10:38,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:10:38,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:10:38,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:10:38,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:10:38,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:10:38,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:10:38,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:10:38,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:10:38,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 02:10:38,273 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:10:38,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:10:38,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:10:38,275 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:10:38,275 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:10:38,276 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:10:38,276 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:10:38,277 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:10:38,277 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:10:38,277 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:10:38,278 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:10:38,278 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:10:38,279 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:10:38,279 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:10:38,279 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:10:38,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:10:38,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:10:38,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:10:38,281 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:10:38,281 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:10:38,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:10:38,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:10:38,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:10:38,282 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:10:38,282 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:10:38,283 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:10:38,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:10:38,283 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:10:38,283 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:10:38,284 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:10:38,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:10:38,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:10:38,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:10:38,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:10:38,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:10:38,287 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:10:38,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:10:38,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:10:38,288 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:10:38,288 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_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0a821c00018fd0a7d1057c117e3e5b172a3096a [2021-10-16 02:10:38,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:10:38,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:10:38,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:10:38,597 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:10:38,598 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:10:38,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/memsafety/test-0219.i [2021-10-16 02:10:38,699 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/data/b04a84a62/bc5abfc908d34d8882c6302b5fdde4e6/FLAGb08e85b7e [2021-10-16 02:10:39,230 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:10:39,233 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/sv-benchmarks/c/memsafety/test-0219.i [2021-10-16 02:10:39,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/data/b04a84a62/bc5abfc908d34d8882c6302b5fdde4e6/FLAGb08e85b7e [2021-10-16 02:10:39,529 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/data/b04a84a62/bc5abfc908d34d8882c6302b5fdde4e6 [2021-10-16 02:10:39,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:10:39,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:10:39,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:10:39,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:10:39,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:10:39,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:10:39" (1/1) ... [2021-10-16 02:10:39,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8cb5b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:10:39, skipping insertion in model container [2021-10-16 02:10:39,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:10:39" (1/1) ... [2021-10-16 02:10:39,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:10:39,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:10:40,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:10:40,146 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:10:40,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:10:40,269 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:10:40,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:10:40 WrapperNode [2021-10-16 02:10:40,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:10:40,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:10:40,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:10:40,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:10:40,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:10:40" (1/1) ... [2021-10-16 02:10:40,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:10:40" (1/1) ... [2021-10-16 02:10:40,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:10:40,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:10:40,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:10:40,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:10:40,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:10:40" (1/1) ... [2021-10-16 02:10:40,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:10:40" (1/1) ... [2021-10-16 02:10:40,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:10:40" (1/1) ... [2021-10-16 02:10:40,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:10:40" (1/1) ... [2021-10-16 02:10:40,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:10:40" (1/1) ... [2021-10-16 02:10:40,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:10:40" (1/1) ... [2021-10-16 02:10:40,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:10:40" (1/1) ... [2021-10-16 02:10:40,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:10:40,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:10:40,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:10:40,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:10:40,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:10:40" (1/1) ... [2021-10-16 02:10:40,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:10:40,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:40,491 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:10:40,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:10:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:10:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:10:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:10:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:10:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:10:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-16 02:10:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:10:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:10:40,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:10:41,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:10:41,320 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-16 02:10:41,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:10:41 BoogieIcfgContainer [2021-10-16 02:10:41,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:10:41,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:10:41,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:10:41,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:10:41,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:10:39" (1/3) ... [2021-10-16 02:10:41,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10df037a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:10:41, skipping insertion in model container [2021-10-16 02:10:41,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:10:40" (2/3) ... [2021-10-16 02:10:41,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10df037a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:10:41, skipping insertion in model container [2021-10-16 02:10:41,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:10:41" (3/3) ... [2021-10-16 02:10:41,366 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0219.i [2021-10-16 02:10:41,377 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:10:41,377 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2021-10-16 02:10:41,434 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:10:41,441 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-10-16 02:10:41,442 INFO L340 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2021-10-16 02:10:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 89 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 02:10:41,471 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:41,472 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 02:10:41,472 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:10:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:41,487 INFO L82 PathProgramCache]: Analyzing trace with hash 207769, now seen corresponding path program 1 times [2021-10-16 02:10:41,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:10:41,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998136973] [2021-10-16 02:10:41,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:41,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:10:41,616 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:10:41,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242689322] [2021-10-16 02:10:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:41,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:41,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:41,620 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:41,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:10:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:41,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:10:41,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:41,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-16 02:10:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:41,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:41,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:10:41,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998136973] [2021-10-16 02:10:41,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:10:41,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242689322] [2021-10-16 02:10:41,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242689322] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:41,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:10:41,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:10:41,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044820848] [2021-10-16 02:10:41,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:10:41,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:10:41,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:10:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:10:41,908 INFO L87 Difference]: Start difference. First operand has 90 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 89 states have internal predecessors, (99), 0 states have call successors, (0), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:42,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:42,091 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-10-16 02:10:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:10:42,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-10-16 02:10:42,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:42,105 INFO L225 Difference]: With dead ends: 113 [2021-10-16 02:10:42,105 INFO L226 Difference]: Without dead ends: 112 [2021-10-16 02:10:42,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:10:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-16 02:10:42,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 87. [2021-10-16 02:10:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 86 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2021-10-16 02:10:42,154 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 3 [2021-10-16 02:10:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:42,155 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2021-10-16 02:10:42,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:42,156 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2021-10-16 02:10:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:10:42,156 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:42,156 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:10:42,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-16 02:10:42,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-16 02:10:42,366 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:10:42,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:42,367 INFO L82 PathProgramCache]: Analyzing trace with hash 6440879, now seen corresponding path program 1 times [2021-10-16 02:10:42,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:10:42,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042843979] [2021-10-16 02:10:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:42,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:10:42,381 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:10:42,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159691347] [2021-10-16 02:10:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:42,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:42,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:42,383 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:42,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:10:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:42,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:10:42,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:42,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 48 treesize of output 47 [2021-10-16 02:10:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:43,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:43,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:10:43,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042843979] [2021-10-16 02:10:43,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:10:43,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159691347] [2021-10-16 02:10:43,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159691347] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:43,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:10:43,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:10:43,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145015424] [2021-10-16 02:10:43,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:10:43,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:10:43,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:10:43,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:10:43,726 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:44,000 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2021-10-16 02:10:44,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:10:44,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 4 [2021-10-16 02:10:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:44,003 INFO L225 Difference]: With dead ends: 86 [2021-10-16 02:10:44,003 INFO L226 Difference]: Without dead ends: 86 [2021-10-16 02:10:44,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:10:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-16 02:10:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-10-16 02:10:44,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2021-10-16 02:10:44,012 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 4 [2021-10-16 02:10:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:44,012 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2021-10-16 02:10:44,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2021-10-16 02:10:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:10:44,013 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:44,013 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:44,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:44,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:44,238 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:10:44,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:44,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1077882261, now seen corresponding path program 1 times [2021-10-16 02:10:44,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:10:44,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860286642] [2021-10-16 02:10:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:44,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:10:44,251 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:10:44,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50408615] [2021-10-16 02:10:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:44,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:44,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:44,253 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:44,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:10:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:44,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:10:44,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:44,442 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-16 02:10:44,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-16 02:10:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:44,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:44,570 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-10-16 02:10:44,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-10-16 02:10:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:44,587 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:10:44,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860286642] [2021-10-16 02:10:44,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:10:44,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50408615] [2021-10-16 02:10:44,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50408615] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:44,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:10:44,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:10:44,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360137054] [2021-10-16 02:10:44,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:10:44,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:10:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:10:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:10:44,593 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:44,866 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-10-16 02:10:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:10:44,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 10 [2021-10-16 02:10:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:44,869 INFO L225 Difference]: With dead ends: 111 [2021-10-16 02:10:44,869 INFO L226 Difference]: Without dead ends: 111 [2021-10-16 02:10:44,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:10:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-16 02:10:44,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2021-10-16 02:10:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 81 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-10-16 02:10:44,877 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 10 [2021-10-16 02:10:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:44,878 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-10-16 02:10:44,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-10-16 02:10:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:10:44,879 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:44,879 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:44,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:45,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:45,102 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:10:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:45,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1077882262, now seen corresponding path program 1 times [2021-10-16 02:10:45,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:10:45,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390812348] [2021-10-16 02:10:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:45,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:10:45,115 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:10:45,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518148609] [2021-10-16 02:10:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:45,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:45,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:45,117 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:45,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-16 02:10:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:45,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-16 02:10:45,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:45,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 48 treesize of output 47 [2021-10-16 02:10:45,887 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:10:45,887 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 1 case distinctions, treesize of input 81 treesize of output 73 [2021-10-16 02:10:45,904 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:10:45,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 69 [2021-10-16 02:10:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:46,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:46,400 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:10:46,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-16 02:10:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:46,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:10:46,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390812348] [2021-10-16 02:10:46,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:10:46,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518148609] [2021-10-16 02:10:46,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518148609] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:46,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:10:46,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-16 02:10:46,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017666945] [2021-10-16 02:10:46,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:10:46,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:10:46,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:10:46,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:10:46,520 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:53,852 INFO L93 Difference]: Finished difference Result 219 states and 231 transitions. [2021-10-16 02:10:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:10:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 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 10 [2021-10-16 02:10:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:53,855 INFO L225 Difference]: With dead ends: 219 [2021-10-16 02:10:53,856 INFO L226 Difference]: Without dead ends: 219 [2021-10-16 02:10:53,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3247.3ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-10-16 02:10:53,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-10-16 02:10:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 86. [2021-10-16 02:10:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 85 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-10-16 02:10:53,865 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 10 [2021-10-16 02:10:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:53,866 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-10-16 02:10:53,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-10-16 02:10:53,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:10:53,867 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:53,867 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:53,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:54,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:54,078 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:10:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash -945537489, now seen corresponding path program 1 times [2021-10-16 02:10:54,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:10:54,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651497066] [2021-10-16 02:10:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:54,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:10:54,090 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:10:54,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819746897] [2021-10-16 02:10:54,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:54,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:54,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:54,095 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:54,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 02:10:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:54,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-16 02:10:54,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:54,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 14 [2021-10-16 02:10:54,529 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:10:54,530 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 1 case distinctions, treesize of input 41 treesize of output 39 [2021-10-16 02:10:54,540 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:10:54,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-10-16 02:10:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:10:54,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:54,786 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:10:54,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-16 02:10:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:10:54,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:10:54,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651497066] [2021-10-16 02:10:54,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:10:54,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819746897] [2021-10-16 02:10:54,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819746897] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:54,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:10:54,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 02:10:54,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526434210] [2021-10-16 02:10:54,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:10:54,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:10:54,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:10:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:10:54,871 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:56,253 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2021-10-16 02:10:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:10:56,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 11 [2021-10-16 02:10:56,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:56,254 INFO L225 Difference]: With dead ends: 114 [2021-10-16 02:10:56,254 INFO L226 Difference]: Without dead ends: 114 [2021-10-16 02:10:56,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 998.9ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:10:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-16 02:10:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2021-10-16 02:10:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 41 states have (on average 2.048780487804878) internal successors, (84), 78 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2021-10-16 02:10:56,264 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 11 [2021-10-16 02:10:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:56,264 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2021-10-16 02:10:56,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2021-10-16 02:10:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:10:56,266 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:56,266 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:56,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-16 02:10:56,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:56,474 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:10:56,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:56,474 INFO L82 PathProgramCache]: Analyzing trace with hash 757865649, now seen corresponding path program 1 times [2021-10-16 02:10:56,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:10:56,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420805632] [2021-10-16 02:10:56,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:56,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:10:56,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:10:56,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681219350] [2021-10-16 02:10:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:56,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:56,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:56,487 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:56,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-16 02:10:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:56,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:10:56,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:56,672 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-16 02:10:56,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-16 02:10:56,754 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-16 02:10:56,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-10-16 02:10:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:56,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:56,962 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-10-16 02:10:56,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-10-16 02:10:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:56,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:10:56,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420805632] [2021-10-16 02:10:56,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:10:56,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681219350] [2021-10-16 02:10:56,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681219350] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:56,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:10:56,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:10:56,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104596538] [2021-10-16 02:10:56,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:10:56,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:10:56,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:10:56,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:10:56,971 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:57,204 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2021-10-16 02:10:57,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:10:57,204 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 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 12 [2021-10-16 02:10:57,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:57,205 INFO L225 Difference]: With dead ends: 105 [2021-10-16 02:10:57,206 INFO L226 Difference]: Without dead ends: 105 [2021-10-16 02:10:57,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:10:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-16 02:10:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2021-10-16 02:10:57,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.975609756097561) internal successors, (81), 75 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:57,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2021-10-16 02:10:57,211 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 12 [2021-10-16 02:10:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:57,212 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2021-10-16 02:10:57,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2021-10-16 02:10:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:10:57,213 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:57,213 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:57,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:57,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:57,438 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:10:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:57,438 INFO L82 PathProgramCache]: Analyzing trace with hash 757865650, now seen corresponding path program 1 times [2021-10-16 02:10:57,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:10:57,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263266579] [2021-10-16 02:10:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:57,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:10:57,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:10:57,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222816532] [2021-10-16 02:10:57,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:57,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:57,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:57,453 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:57,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 02:10:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:57,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-16 02:10:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:57,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 48 treesize of output 47 [2021-10-16 02:10:59,871 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-16 02:10:59,872 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 1 case distinctions, treesize of input 72 treesize of output 66 [2021-10-16 02:10:59,896 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-16 02:10:59,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 70 [2021-10-16 02:11:01,225 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-16 02:11:01,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 77 [2021-10-16 02:11:01,244 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-10-16 02:11:01,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 75 [2021-10-16 02:11:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:11:02,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:11:03,112 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-10-16 02:11:03,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 43 [2021-10-16 02:11:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:11:03,382 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:11:03,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263266579] [2021-10-16 02:11:03,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:11:03,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222816532] [2021-10-16 02:11:03,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222816532] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:11:03,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:11:03,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-10-16 02:11:03,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444849604] [2021-10-16 02:11:03,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 02:11:03,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:11:03,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 02:11:03,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:11:03,385 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:11:18,266 WARN L207 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 150 DAG size of output: 131 [2021-10-16 02:11:24,724 WARN L207 SmtUtils]: Spent 5.45 s on a formula simplification. DAG size of input: 146 DAG size of output: 129 [2021-10-16 02:11:36,499 WARN L207 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 149 DAG size of output: 134 [2021-10-16 02:12:04,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:12:04,275 INFO L93 Difference]: Finished difference Result 296 states and 314 transitions. [2021-10-16 02:12:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-16 02:12:04,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-10-16 02:12:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:12:04,277 INFO L225 Difference]: With dead ends: 296 [2021-10-16 02:12:04,277 INFO L226 Difference]: Without dead ends: 296 [2021-10-16 02:12:04,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 36724.1ms TimeCoverageRelationStatistics Valid=288, Invalid=704, Unknown=0, NotChecked=0, Total=992 [2021-10-16 02:12:04,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-16 02:12:04,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 86. [2021-10-16 02:12:04,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 52 states have (on average 1.8076923076923077) internal successors, (94), 85 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:12:04,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-10-16 02:12:04,285 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 12 [2021-10-16 02:12:04,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:12:04,286 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-10-16 02:12:04,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:12:04,286 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-10-16 02:12:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:12:04,287 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:12:04,287 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:12:04,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-16 02:12:04,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:12:04,510 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:12:04,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:12:04,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2137912672, now seen corresponding path program 1 times [2021-10-16 02:12:04,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:12:04,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413716547] [2021-10-16 02:12:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:12:04,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:12:04,522 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:12:04,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033501536] [2021-10-16 02:12:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:12:04,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:12:04,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:12:04,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:12:04,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 02:12:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:12:04,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-16 02:12:04,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:12:04,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2021-10-16 02:12:04,920 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-16 02:12:04,920 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 1 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 02:12:04,946 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-16 02:12:04,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-10-16 02:12:05,117 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-16 02:12:05,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 43 [2021-10-16 02:12:05,138 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-16 02:12:05,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-10-16 02:12:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:12:05,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:12:05,939 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-10-16 02:12:05,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 43 [2021-10-16 02:12:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:12:06,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:12:06,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413716547] [2021-10-16 02:12:06,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:12:06,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033501536] [2021-10-16 02:12:06,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033501536] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:12:06,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:12:06,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-16 02:12:06,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246267952] [2021-10-16 02:12:06,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:12:06,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:12:06,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:12:06,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:12:06,278 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:12:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:12:07,118 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-10-16 02:12:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:12:07,119 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2021-10-16 02:12:07,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:12:07,120 INFO L225 Difference]: With dead ends: 117 [2021-10-16 02:12:07,120 INFO L226 Difference]: Without dead ends: 117 [2021-10-16 02:12:07,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:12:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-16 02:12:07,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2021-10-16 02:12:07,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:12:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2021-10-16 02:12:07,125 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 13 [2021-10-16 02:12:07,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:12:07,126 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2021-10-16 02:12:07,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:12:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2021-10-16 02:12:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:12:07,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:12:07,127 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:12:07,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:12:07,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:12:07,337 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:12:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:12:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1271452532, now seen corresponding path program 1 times [2021-10-16 02:12:07,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:12:07,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728685330] [2021-10-16 02:12:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:12:07,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:12:07,347 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:12:07,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138271047] [2021-10-16 02:12:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:12:07,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:12:07,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:12:07,352 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:12:07,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-16 02:12:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:12:07,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:12:07,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:12:07,652 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-10-16 02:12:07,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-10-16 02:12:07,871 INFO L354 Elim1Store]: treesize reduction 76, result has 39.2 percent of original size [2021-10-16 02:12:07,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 case distinctions, treesize of input 37 treesize of output 76 [2021-10-16 02:12:08,958 INFO L354 Elim1Store]: treesize reduction 122, result has 30.7 percent of original size [2021-10-16 02:12:08,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 50 treesize of output 92 [2021-10-16 02:12:10,357 INFO L354 Elim1Store]: treesize reduction 160, result has 31.9 percent of original size [2021-10-16 02:12:10,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 58 treesize of output 119 [2021-10-16 02:12:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:12:13,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:12:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:12:15,645 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:12:15,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728685330] [2021-10-16 02:12:15,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:12:15,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138271047] [2021-10-16 02:12:15,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138271047] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:12:15,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:12:15,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 11 [2021-10-16 02:12:15,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641197008] [2021-10-16 02:12:15,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 02:12:15,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:12:15,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 02:12:15,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=105, Unknown=1, NotChecked=0, Total=156 [2021-10-16 02:12:15,647 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:12:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:12:33,718 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-10-16 02:12:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:12:33,718 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 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 16 [2021-10-16 02:12:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:12:33,719 INFO L225 Difference]: With dead ends: 108 [2021-10-16 02:12:33,719 INFO L226 Difference]: Without dead ends: 108 [2021-10-16 02:12:33,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 3689.2ms TimeCoverageRelationStatistics Valid=103, Invalid=168, Unknown=1, NotChecked=0, Total=272 [2021-10-16 02:12:33,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-16 02:12:33,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 69. [2021-10-16 02:12:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:12:33,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2021-10-16 02:12:33,723 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 16 [2021-10-16 02:12:33,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:12:33,723 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2021-10-16 02:12:33,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:12:33,724 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2021-10-16 02:12:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:12:33,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:12:33,725 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:12:33,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:12:33,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-16 02:12:33,930 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:12:33,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:12:33,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1271452533, now seen corresponding path program 1 times [2021-10-16 02:12:33,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:12:33,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258727124] [2021-10-16 02:12:33,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:12:33,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:12:33,941 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:12:33,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526981398] [2021-10-16 02:12:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:12:33,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:12:33,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:12:33,947 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:12:33,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:12:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:12:34,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 02:12:34,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:12:34,302 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-10-16 02:12:34,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 12 treesize of output 27 [2021-10-16 02:12:34,352 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-16 02:12:34,353 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 1 case distinctions, treesize of input 17 treesize of output 19 [2021-10-16 02:12:36,582 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-10-16 02:12:36,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 40 [2021-10-16 02:12:38,769 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-10-16 02:12:38,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 37 [2021-10-16 02:12:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:12:39,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:12:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:12:40,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:12:40,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258727124] [2021-10-16 02:12:40,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:12:40,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526981398] [2021-10-16 02:12:40,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526981398] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:12:40,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:12:40,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-16 02:12:40,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177288296] [2021-10-16 02:12:40,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:12:40,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:12:40,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:12:40,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:12:40,383 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:12:58,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:12:58,978 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2021-10-16 02:12:58,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:12:58,980 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 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 16 [2021-10-16 02:12:58,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:12:58,981 INFO L225 Difference]: With dead ends: 122 [2021-10-16 02:12:58,981 INFO L226 Difference]: Without dead ends: 122 [2021-10-16 02:12:58,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 10812.0ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:12:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-16 02:12:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 62. [2021-10-16 02:12:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 61 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) [2021-10-16 02:12:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-10-16 02:12:58,985 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 16 [2021-10-16 02:12:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:12:58,985 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-10-16 02:12:58,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:12:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-10-16 02:12:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:12:58,986 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:12:58,986 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:12:59,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:12:59,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:12:59,187 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:12:59,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:12:59,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1365290053, now seen corresponding path program 1 times [2021-10-16 02:12:59,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:12:59,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065887893] [2021-10-16 02:12:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:12:59,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:12:59,207 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:12:59,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094729245] [2021-10-16 02:12:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:12:59,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:12:59,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:12:59,209 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:12:59,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-16 02:12:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:12:59,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:12:59,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:12:59,845 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 17 treesize of output 13 [2021-10-16 02:12:59,869 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 17 treesize of output 9 [2021-10-16 02:12:59,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:12:59,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:12:59,904 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 32 treesize of output 28 [2021-10-16 02:13:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:00,127 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:00,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065887893] [2021-10-16 02:13:00,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:13:00,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094729245] [2021-10-16 02:13:00,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094729245] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:00,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:00,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-16 02:13:00,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666443387] [2021-10-16 02:13:00,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:13:00,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:00,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:13:00,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:13:00,130 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:00,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:00,431 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2021-10-16 02:13:00,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:13:00,433 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 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 21 [2021-10-16 02:13:00,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:00,435 INFO L225 Difference]: With dead ends: 90 [2021-10-16 02:13:00,435 INFO L226 Difference]: Without dead ends: 90 [2021-10-16 02:13:00,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:13:00,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-16 02:13:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 64. [2021-10-16 02:13:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.627906976744186) internal successors, (70), 63 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) [2021-10-16 02:13:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-10-16 02:13:00,441 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 21 [2021-10-16 02:13:00,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:00,442 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-10-16 02:13:00,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:00,442 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-10-16 02:13:00,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:13:00,443 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:00,444 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:00,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:13:00,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-16 02:13:00,644 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:13:00,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:00,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1365290052, now seen corresponding path program 1 times [2021-10-16 02:13:00,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:00,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204622201] [2021-10-16 02:13:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:00,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:00,678 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:13:00,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127898765] [2021-10-16 02:13:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:00,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:13:00,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:13:00,683 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:13:00,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-16 02:13:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:01,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-16 02:13:01,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:01,570 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 33 treesize of output 29 [2021-10-16 02:13:01,573 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 30 treesize of output 26 [2021-10-16 02:13:01,622 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 29 [2021-10-16 02:13:01,625 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 26 treesize of output 14 [2021-10-16 02:13:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:01,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:01,741 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 60 treesize of output 56 [2021-10-16 02:13:01,744 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 90 treesize of output 82 [2021-10-16 02:13:01,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:13:01,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:13:01,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:13:02,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-10-16 02:13:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:02,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:02,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204622201] [2021-10-16 02:13:02,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:13:02,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127898765] [2021-10-16 02:13:02,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127898765] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:02,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:02,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 14 [2021-10-16 02:13:02,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037858157] [2021-10-16 02:13:02,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-16 02:13:02,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-16 02:13:02,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:13:02,305 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:02,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:02,609 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-10-16 02:13:02,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:13:02,610 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 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 21 [2021-10-16 02:13:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:02,611 INFO L225 Difference]: With dead ends: 100 [2021-10-16 02:13:02,611 INFO L226 Difference]: Without dead ends: 100 [2021-10-16 02:13:02,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-10-16 02:13:02,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-16 02:13:02,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2021-10-16 02:13:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 63 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) [2021-10-16 02:13:02,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2021-10-16 02:13:02,615 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 21 [2021-10-16 02:13:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:02,615 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2021-10-16 02:13:02,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:02,616 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2021-10-16 02:13:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:13:02,617 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:02,617 INFO L512 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] [2021-10-16 02:13:02,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:13:02,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:13:02,830 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:13:02,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:02,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2078638933, now seen corresponding path program 1 times [2021-10-16 02:13:02,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:02,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174187723] [2021-10-16 02:13:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:02,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:02,844 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:13:02,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375028425] [2021-10-16 02:13:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:02,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:13:02,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:13:02,861 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:13:02,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 02:13:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:03,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:13:03,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:03,426 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 17 treesize of output 9 [2021-10-16 02:13:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:03,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:03,455 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-10-16 02:13:03,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-10-16 02:13:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:03,495 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:03,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174187723] [2021-10-16 02:13:03,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:13:03,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375028425] [2021-10-16 02:13:03,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375028425] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:03,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:03,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 02:13:03,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612353518] [2021-10-16 02:13:03,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:13:03,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:03,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:13:03,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:13:03,497 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:03,638 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2021-10-16 02:13:03,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:13:03,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-10-16 02:13:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:03,640 INFO L225 Difference]: With dead ends: 75 [2021-10-16 02:13:03,640 INFO L226 Difference]: Without dead ends: 75 [2021-10-16 02:13:03,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:13:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-16 02:13:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2021-10-16 02:13:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-10-16 02:13:03,644 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 23 [2021-10-16 02:13:03,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:03,644 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-10-16 02:13:03,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-10-16 02:13:03,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:13:03,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:03,645 INFO L512 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] [2021-10-16 02:13:03,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-16 02:13:03,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:13:03,846 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:13:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:03,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2078638932, now seen corresponding path program 1 times [2021-10-16 02:13:03,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:03,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227891408] [2021-10-16 02:13:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:03,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:03,857 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:13:03,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725984209] [2021-10-16 02:13:03,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:03,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:13:03,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:13:03,872 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:13:03,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-16 02:13:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:04,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-16 02:13:04,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:04,678 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 30 treesize of output 26 [2021-10-16 02:13:04,683 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 23 treesize of output 19 [2021-10-16 02:13:04,791 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 29 [2021-10-16 02:13:04,795 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 26 treesize of output 14 [2021-10-16 02:13:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:04,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:04,974 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 75 treesize of output 71 [2021-10-16 02:13:04,978 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 117 treesize of output 105 [2021-10-16 02:13:05,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:13:05,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-10-16 02:13:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:05,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:05,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227891408] [2021-10-16 02:13:05,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:13:05,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725984209] [2021-10-16 02:13:05,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725984209] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:05,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:05,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 16 [2021-10-16 02:13:05,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350476] [2021-10-16 02:13:05,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-16 02:13:05,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:05,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-16 02:13:05,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-10-16 02:13:05,646 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:06,171 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-10-16 02:13:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:13:06,172 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-16 02:13:06,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:06,174 INFO L225 Difference]: With dead ends: 97 [2021-10-16 02:13:06,174 INFO L226 Difference]: Without dead ends: 97 [2021-10-16 02:13:06,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 506.9ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-10-16 02:13:06,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-16 02:13:06,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2021-10-16 02:13:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 64 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) [2021-10-16 02:13:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-10-16 02:13:06,177 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 23 [2021-10-16 02:13:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:06,178 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-10-16 02:13:06,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:06,179 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-10-16 02:13:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 02:13:06,180 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:06,180 INFO L512 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] [2021-10-16 02:13:06,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:13:06,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-16 02:13:06,394 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:13:06,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:06,394 INFO L82 PathProgramCache]: Analyzing trace with hash -13295280, now seen corresponding path program 1 times [2021-10-16 02:13:06,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:06,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700261824] [2021-10-16 02:13:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:06,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:06,406 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:13:06,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035287364] [2021-10-16 02:13:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:06,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:13:06,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:13:06,411 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:13:06,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-16 02:13:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:07,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-16 02:13:07,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:07,094 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-10-16 02:13:07,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-10-16 02:13:07,265 INFO L354 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2021-10-16 02:13:07,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 36 treesize of output 62 [2021-10-16 02:13:07,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-16 02:13:07,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:13:07,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-16 02:13:07,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-10-16 02:13:07,914 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 11 treesize of output 7 [2021-10-16 02:13:08,014 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 43 treesize of output 35 [2021-10-16 02:13:08,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:13:08,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2021-10-16 02:13:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:08,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:08,188 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 111 treesize of output 103 [2021-10-16 02:13:18,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:13:18,690 INFO L354 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2021-10-16 02:13:18,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 63341 treesize of output 60505 [2021-10-16 02:13:21,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:21,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700261824] [2021-10-16 02:13:21,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:13:21,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035287364] [2021-10-16 02:13:21,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:13:21,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801501984] [2021-10-16 02:13:21,664 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-10-16 02:13:21,665 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:13:21,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:13:21,675 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:13:21,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:13:21,721 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:13:21,722 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:13:21,723 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:13:21,724 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:13:21,724 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:13:21,724 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:13:21,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:13:21,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-10-16 02:13:21,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:13:21,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:13:21,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:13:21,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 02:13:21,746 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:13:21,747 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:13:21,747 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:13:21,747 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:13:21,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:13:21,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:13:21,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:13:21,775 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:13:21,776 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-10-16 02:13:21,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:13:21,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:133, output treesize:136 [2021-10-16 02:13:21,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-16 02:13:21,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-16 02:13:21,986 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_144| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:13:21,989 INFO L168 Benchmark]: Toolchain (without parser) took 162455.54 ms. Allocated memory was 94.4 MB in the beginning and 310.4 MB in the end (delta: 216.0 MB). Free memory was 51.5 MB in the beginning and 118.3 MB in the end (delta: -66.9 MB). Peak memory consumption was 149.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:13:21,989 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 94.4 MB. Free memory is still 69.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:13:21,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.73 ms. Allocated memory is still 94.4 MB. Free memory was 51.2 MB in the beginning and 60.4 MB in the end (delta: -9.1 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:13:21,989 INFO L168 Benchmark]: Boogie Procedure Inliner took 101.01 ms. Allocated memory is still 94.4 MB. Free memory was 60.4 MB in the beginning and 57.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:13:21,990 INFO L168 Benchmark]: Boogie Preprocessor took 67.36 ms. Allocated memory is still 94.4 MB. Free memory was 57.9 MB in the beginning and 56.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:13:21,990 INFO L168 Benchmark]: RCFGBuilder took 882.94 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 56.2 MB in the beginning and 86.8 MB in the end (delta: -30.7 MB). Peak memory consumption was 30.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:13:21,990 INFO L168 Benchmark]: TraceAbstraction took 160636.20 ms. Allocated memory was 113.2 MB in the beginning and 310.4 MB in the end (delta: 197.1 MB). Free memory was 87.1 MB in the beginning and 118.3 MB in the end (delta: -31.3 MB). Peak memory consumption was 166.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:13:21,992 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 94.4 MB. Free memory is still 69.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 732.73 ms. Allocated memory is still 94.4 MB. Free memory was 51.2 MB in the beginning and 60.4 MB in the end (delta: -9.1 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 101.01 ms. Allocated memory is still 94.4 MB. Free memory was 60.4 MB in the beginning and 57.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 67.36 ms. Allocated memory is still 94.4 MB. Free memory was 57.9 MB in the beginning and 56.2 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 882.94 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 56.2 MB in the beginning and 86.8 MB in the end (delta: -30.7 MB). Peak memory consumption was 30.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 160636.20 ms. Allocated memory was 113.2 MB in the beginning and 310.4 MB in the end (delta: 197.1 MB). Free memory was 87.1 MB in the beginning and 118.3 MB in the end (delta: -31.3 MB). Peak memory consumption was 166.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_144| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_144|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:13:22,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:13:24,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:13:24,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:13:24,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:13:24,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:13:24,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:13:24,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:13:24,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:13:24,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:13:24,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:13:24,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:13:24,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:13:24,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:13:24,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:13:24,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:13:24,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:13:24,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:13:24,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:13:24,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:13:24,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:13:24,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:13:24,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:13:24,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:13:24,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:13:24,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:13:24,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:13:24,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:13:24,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:13:24,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:13:24,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:13:24,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:13:24,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:13:24,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:13:24,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:13:24,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:13:24,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:13:24,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:13:24,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:13:24,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:13:24,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:13:24,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:13:24,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-16 02:13:24,452 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:13:24,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:13:24,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:13:24,454 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:13:24,455 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:13:24,455 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:13:24,455 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:13:24,455 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:13:24,456 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:13:24,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:13:24,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:13:24,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:13:24,459 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:13:24,459 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:13:24,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:13:24,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:13:24,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:13:24,460 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:13:24,460 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:13:24,460 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:13:24,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:13:24,461 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:13:24,461 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:13:24,461 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:13:24,461 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:13:24,462 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:13:24,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:13:24,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:13:24,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:13:24,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:13:24,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:13:24,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:13:24,464 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:13:24,464 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:13:24,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:13:24,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:13:24,465 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_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0a821c00018fd0a7d1057c117e3e5b172a3096a [2021-10-16 02:13:24,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:13:24,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:13:24,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:13:24,872 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:13:24,873 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:13:24,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/memsafety/test-0219.i [2021-10-16 02:13:24,944 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/data/456ff4ce1/22efc1640d904057a1b6028cbf780729/FLAGf49a01c5b [2021-10-16 02:13:25,507 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:13:25,508 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/sv-benchmarks/c/memsafety/test-0219.i [2021-10-16 02:13:25,523 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/data/456ff4ce1/22efc1640d904057a1b6028cbf780729/FLAGf49a01c5b [2021-10-16 02:13:25,932 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/data/456ff4ce1/22efc1640d904057a1b6028cbf780729 [2021-10-16 02:13:25,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:13:25,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:13:25,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:13:25,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:13:25,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:13:25,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:13:25" (1/1) ... [2021-10-16 02:13:25,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c19fc09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:25, skipping insertion in model container [2021-10-16 02:13:25,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:13:25" (1/1) ... [2021-10-16 02:13:25,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:13:25,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:13:26,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:13:26,369 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:13:26,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:13:26,457 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:13:26,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:26 WrapperNode [2021-10-16 02:13:26,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:13:26,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:13:26,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:13:26,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:13:26,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:26" (1/1) ... [2021-10-16 02:13:26,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:26" (1/1) ... [2021-10-16 02:13:26,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:13:26,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:13:26,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:13:26,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:13:26,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:26" (1/1) ... [2021-10-16 02:13:26,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:26" (1/1) ... [2021-10-16 02:13:26,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:26" (1/1) ... [2021-10-16 02:13:26,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:26" (1/1) ... [2021-10-16 02:13:26,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:26" (1/1) ... [2021-10-16 02:13:26,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:26" (1/1) ... [2021-10-16 02:13:26,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:26" (1/1) ... [2021-10-16 02:13:26,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:13:26,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:13:26,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:13:26,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:13:26,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:26" (1/1) ... [2021-10-16 02:13:26,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:13:26,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:13:26,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:13:26,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:13:26,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:13:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:13:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:13:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:13:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:13:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-16 02:13:26,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:13:26,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:13:26,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:13:27,397 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:13:27,398 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-16 02:13:27,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:13:27 BoogieIcfgContainer [2021-10-16 02:13:27,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:13:27,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:13:27,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:13:27,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:13:27,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:13:25" (1/3) ... [2021-10-16 02:13:27,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c493ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:13:27, skipping insertion in model container [2021-10-16 02:13:27,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:26" (2/3) ... [2021-10-16 02:13:27,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c493ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:13:27, skipping insertion in model container [2021-10-16 02:13:27,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:13:27" (3/3) ... [2021-10-16 02:13:27,409 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0219.i [2021-10-16 02:13:27,414 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:13:27,415 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2021-10-16 02:13:27,487 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:13:27,496 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-10-16 02:13:27,496 INFO L340 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2021-10-16 02:13:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 105 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:27,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:13:27,538 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:27,539 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:13:27,540 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:13:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:27,552 INFO L82 PathProgramCache]: Analyzing trace with hash 925636, now seen corresponding path program 1 times [2021-10-16 02:13:27,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:13:27,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54064047] [2021-10-16 02:13:27,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:27,567 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:13:27,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:13:27,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:13:27,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:13:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:27,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:13:27,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:27,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-16 02:13:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:27,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:27,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:13:27,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54064047] [2021-10-16 02:13:27,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54064047] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:27,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:27,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:13:27,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459134934] [2021-10-16 02:13:27,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:13:27,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:13:27,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:13:27,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:13:27,860 INFO L87 Difference]: Start difference. First operand has 106 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 105 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:28,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:28,133 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2021-10-16 02:13:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:13:28,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-10-16 02:13:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:28,142 INFO L225 Difference]: With dead ends: 132 [2021-10-16 02:13:28,143 INFO L226 Difference]: Without dead ends: 130 [2021-10-16 02:13:28,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:13:28,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-16 02:13:28,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2021-10-16 02:13:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 101 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:28,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-10-16 02:13:28,181 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 4 [2021-10-16 02:13:28,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:28,182 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-10-16 02:13:28,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:28,182 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-10-16 02:13:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:13:28,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:28,205 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:13:28,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:13:28,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:13:28,406 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:13:28,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:28,407 INFO L82 PathProgramCache]: Analyzing trace with hash 28694756, now seen corresponding path program 1 times [2021-10-16 02:13:28,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:13:28,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195961533] [2021-10-16 02:13:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:28,409 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:13:28,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:13:28,410 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:13:28,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:13:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:28,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:13:28,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:28,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-16 02:13:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:28,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:28,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:13:28,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195961533] [2021-10-16 02:13:28,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195961533] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:28,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:28,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:13:28,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289652619] [2021-10-16 02:13:28,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:28,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:13:28,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:28,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:28,756 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:29,339 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-10-16 02:13:29,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:29,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 5 [2021-10-16 02:13:29,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:29,343 INFO L225 Difference]: With dead ends: 102 [2021-10-16 02:13:29,343 INFO L226 Difference]: Without dead ends: 102 [2021-10-16 02:13:29,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:29,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-16 02:13:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-10-16 02:13:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 56 states have (on average 1.875) internal successors, (105), 99 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-10-16 02:13:29,357 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 5 [2021-10-16 02:13:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:29,358 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-10-16 02:13:29,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-10-16 02:13:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:13:29,360 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:29,361 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:29,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:13:29,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:13:29,573 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:13:29,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:29,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1069793572, now seen corresponding path program 1 times [2021-10-16 02:13:29,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:13:29,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414946334] [2021-10-16 02:13:29,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:29,575 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:13:29,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:13:29,577 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:13:29,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:13:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:29,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:13:29,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:29,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:29,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:13:29,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414946334] [2021-10-16 02:13:29,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414946334] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:29,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:29,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:13:29,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174337805] [2021-10-16 02:13:29,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:13:29,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:13:29,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:13:29,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:13:29,883 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:29,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:29,983 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-10-16 02:13:29,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:13:29,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 18 [2021-10-16 02:13:29,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:29,985 INFO L225 Difference]: With dead ends: 105 [2021-10-16 02:13:29,985 INFO L226 Difference]: Without dead ends: 105 [2021-10-16 02:13:29,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:13:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-16 02:13:29,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-10-16 02:13:29,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.8166666666666667) internal successors, (109), 103 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-10-16 02:13:30,000 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 18 [2021-10-16 02:13:30,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:30,001 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-10-16 02:13:30,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:30,001 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-10-16 02:13:30,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:13:30,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:30,003 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:30,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:13:30,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:13:30,215 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:13:30,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:30,216 INFO L82 PathProgramCache]: Analyzing trace with hash 179406396, now seen corresponding path program 1 times [2021-10-16 02:13:30,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:13:30,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942350161] [2021-10-16 02:13:30,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:30,219 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:13:30,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:13:30,220 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:13:30,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:13:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:30,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:13:30,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:13:30,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:13:30,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:13:30,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942350161] [2021-10-16 02:13:30,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942350161] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:13:30,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2119854014] [2021-10-16 02:13:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:30,726 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:13:30,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:13:30,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:13:30,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-16 02:13:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:30,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:13:30,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:13:31,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:13:31,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2119854014] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:13:31,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31293940] [2021-10-16 02:13:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:31,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:13:31,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:13:31,154 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:13:31,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-16 02:13:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:31,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:13:31,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:31,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-16 02:13:31,480 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 02:13:31,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-10-16 02:13:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:13:31,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:13:40,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31293940] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:40,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:13:40,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6, 6, 6] total 17 [2021-10-16 02:13:40,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916269479] [2021-10-16 02:13:40,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:13:40,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:13:40,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:13:40,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=216, Unknown=4, NotChecked=0, Total=272 [2021-10-16 02:13:40,036 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:40,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:40,690 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2021-10-16 02:13:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:13:40,691 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 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 22 [2021-10-16 02:13:40,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:40,692 INFO L225 Difference]: With dead ends: 138 [2021-10-16 02:13:40,692 INFO L226 Difference]: Without dead ends: 138 [2021-10-16 02:13:40,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 8551.4ms TimeCoverageRelationStatistics Valid=86, Invalid=330, Unknown=4, NotChecked=0, Total=420 [2021-10-16 02:13:40,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-16 02:13:40,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2021-10-16 02:13:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 60 states have (on average 1.7666666666666666) internal successors, (106), 100 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-10-16 02:13:40,700 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 22 [2021-10-16 02:13:40,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:40,701 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-10-16 02:13:40,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:40,701 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-10-16 02:13:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:13:40,702 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:40,702 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:40,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:13:40,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-10-16 02:13:41,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:13:41,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:13:41,321 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:13:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:41,322 INFO L82 PathProgramCache]: Analyzing trace with hash 179406397, now seen corresponding path program 1 times [2021-10-16 02:13:41,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:13:41,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171847137] [2021-10-16 02:13:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:41,323 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:13:41,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:13:41,324 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:13:41,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:13:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:41,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:13:41,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:13:41,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:13:41,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:13:41,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171847137] [2021-10-16 02:13:41,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171847137] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:13:41,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [19014242] [2021-10-16 02:13:41,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:41,791 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:13:41,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:13:41,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:13:41,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-16 02:13:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:42,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:13:42,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:13:42,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:13:42,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [19014242] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:13:42,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675135957] [2021-10-16 02:13:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:42,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:13:42,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:13:42,259 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:13:42,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-16 02:13:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:42,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:13:42,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:13:42,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:13:42,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675135957] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:13:42,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:13:42,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 12 [2021-10-16 02:13:42,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582677029] [2021-10-16 02:13:42,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:13:42,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:13:42,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:13:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:13:42,705 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:43,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:43,087 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-10-16 02:13:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:13:43,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 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 22 [2021-10-16 02:13:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:43,090 INFO L225 Difference]: With dead ends: 112 [2021-10-16 02:13:43,090 INFO L226 Difference]: Without dead ends: 112 [2021-10-16 02:13:43,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:13:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-16 02:13:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-10-16 02:13:43,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 68 states have (on average 1.6764705882352942) internal successors, (114), 108 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-10-16 02:13:43,097 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 22 [2021-10-16 02:13:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:43,098 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-10-16 02:13:43,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:43,098 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-10-16 02:13:43,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-16 02:13:43,099 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:43,099 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:43,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:13:43,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:13:43,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-16 02:13:43,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:13:43,723 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:13:43,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:43,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1164168445, now seen corresponding path program 2 times [2021-10-16 02:13:43,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:13:43,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128046861] [2021-10-16 02:13:43,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:13:43,725 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:13:43,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:13:43,726 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:13:43,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:13:43,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-16 02:13:43,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:13:43,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:13:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:43,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-16 02:13:44,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-16 02:13:44,257 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:13:44,257 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 1 case distinctions, treesize of input 27 treesize of output 29 [2021-10-16 02:13:44,270 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:13:44,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-10-16 02:13:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-16 02:13:44,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-16 02:13:49,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:13:49,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128046861] [2021-10-16 02:13:49,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128046861] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:49,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:49,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-16 02:13:49,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096876123] [2021-10-16 02:13:49,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:13:49,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:13:49,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:13:49,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-10-16 02:13:49,760 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:55,717 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2021-10-16 02:13:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:13:55,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-10-16 02:13:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:55,720 INFO L225 Difference]: With dead ends: 154 [2021-10-16 02:13:55,720 INFO L226 Difference]: Without dead ends: 154 [2021-10-16 02:13:55,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 5384.7ms TimeCoverageRelationStatistics Valid=68, Invalid=141, Unknown=1, NotChecked=0, Total=210 [2021-10-16 02:13:55,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-16 02:13:55,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2021-10-16 02:13:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 105 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2021-10-16 02:13:55,728 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 30 [2021-10-16 02:13:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:55,728 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2021-10-16 02:13:55,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:55,729 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2021-10-16 02:13:55,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-16 02:13:55,730 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:55,730 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:55,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-16 02:13:55,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:13:55,943 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:13:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:55,943 INFO L82 PathProgramCache]: Analyzing trace with hash 612907455, now seen corresponding path program 1 times [2021-10-16 02:13:55,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:13:55,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376561054] [2021-10-16 02:13:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:55,944 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:13:55,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:13:55,946 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:13:55,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:13:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:13:56,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:13:56,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:13:56,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:13:56,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376561054] [2021-10-16 02:13:56,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376561054] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:13:56,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1855058239] [2021-10-16 02:13:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:56,937 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:13:56,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:13:56,938 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:13:56,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 02:13:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:57,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:13:57,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:13:57,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:13:57,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1855058239] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:13:57,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546854792] [2021-10-16 02:13:57,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:57,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:13:57,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:13:57,597 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:13:57,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 02:13:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:57,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:13:57,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:13:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:13:58,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:13:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:13:58,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546854792] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:13:58,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:13:58,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 20 [2021-10-16 02:13:58,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37558248] [2021-10-16 02:13:58,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 02:13:58,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:13:58,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 02:13:58,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:13:58,392 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:59,253 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-10-16 02:13:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:13:59,255 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 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 34 [2021-10-16 02:13:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:59,256 INFO L225 Difference]: With dead ends: 113 [2021-10-16 02:13:59,256 INFO L226 Difference]: Without dead ends: 113 [2021-10-16 02:13:59,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 636.9ms TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:13:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-16 02:13:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-10-16 02:13:59,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 72 states have (on average 1.5972222222222223) internal successors, (115), 109 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:59,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2021-10-16 02:13:59,272 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 34 [2021-10-16 02:13:59,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:59,272 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2021-10-16 02:13:59,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:59,272 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2021-10-16 02:13:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 02:13:59,276 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:59,276 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:59,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:13:59,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:13:59,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:13:59,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:13:59,882 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:13:59,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:59,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1812105503, now seen corresponding path program 2 times [2021-10-16 02:13:59,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:13:59,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741058149] [2021-10-16 02:13:59,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:13:59,883 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:13:59,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:13:59,884 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:13:59,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:14:00,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-16 02:14:00,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:14:00,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:14:00,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:00,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-16 02:14:00,362 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 02:14:00,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-10-16 02:14:00,933 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-16 02:14:00,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 47 [2021-10-16 02:14:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:01,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:14,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:14,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741058149] [2021-10-16 02:14:14,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741058149] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:14,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:14,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-16 02:14:14,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959003710] [2021-10-16 02:14:14,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:14:14,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:14,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:14:14,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=64, Unknown=5, NotChecked=0, Total=90 [2021-10-16 02:14:14,359 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:15,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:15,346 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2021-10-16 02:14:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:14:15,346 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-16 02:14:15,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:15,348 INFO L225 Difference]: With dead ends: 150 [2021-10-16 02:14:15,348 INFO L226 Difference]: Without dead ends: 150 [2021-10-16 02:14:15,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 13181.7ms TimeCoverageRelationStatistics Valid=76, Invalid=159, Unknown=5, NotChecked=0, Total=240 [2021-10-16 02:14:15,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-16 02:14:15,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 107. [2021-10-16 02:14:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.5555555555555556) internal successors, (112), 106 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-10-16 02:14:15,354 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 38 [2021-10-16 02:14:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:15,355 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-10-16 02:14:15,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:15,355 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-10-16 02:14:15,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 02:14:15,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:15,357 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:15,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:15,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:15,570 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:14:15,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:15,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1812105504, now seen corresponding path program 1 times [2021-10-16 02:14:15,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:15,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978405314] [2021-10-16 02:14:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:15,572 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:15,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:15,573 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:15,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 02:14:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:16,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-16 02:14:16,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:16,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-16 02:14:16,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-16 02:14:16,505 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-16 02:14:16,505 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 1 case distinctions, treesize of input 29 treesize of output 31 [2021-10-16 02:14:16,555 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:14:16,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-16 02:14:17,153 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:14:17,153 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 1 case distinctions, treesize of input 12 treesize of output 18 [2021-10-16 02:14:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:17,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:21,396 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:21,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978405314] [2021-10-16 02:14:21,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978405314] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:21,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:21,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-16 02:14:21,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242445166] [2021-10-16 02:14:21,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:14:21,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:21,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:14:21,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:14:21,398 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:26,102 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2021-10-16 02:14:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:14:26,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-16 02:14:26,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:26,107 INFO L225 Difference]: With dead ends: 148 [2021-10-16 02:14:26,108 INFO L226 Difference]: Without dead ends: 148 [2021-10-16 02:14:26,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2755.0ms TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:14:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-16 02:14:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 104. [2021-10-16 02:14:26,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.5138888888888888) internal successors, (109), 103 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-10-16 02:14:26,113 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 38 [2021-10-16 02:14:26,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:26,113 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-10-16 02:14:26,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:26,114 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-10-16 02:14:26,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-16 02:14:26,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:26,115 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:26,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:26,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:26,318 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:14:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:26,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1003649363, now seen corresponding path program 1 times [2021-10-16 02:14:26,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:26,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518767581] [2021-10-16 02:14:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:26,319 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:26,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:26,320 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:26,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 02:14:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:26,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:14:26,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:26,945 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-10-16 02:14:26,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-10-16 02:14:27,120 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:14:27,121 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 1 case distinctions, treesize of input 16 treesize of output 21 [2021-10-16 02:14:27,490 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-16 02:14:27,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2021-10-16 02:14:28,189 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-10-16 02:14:28,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 70 [2021-10-16 02:14:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:28,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:29,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:29,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518767581] [2021-10-16 02:14:29,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518767581] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:29,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:29,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 10] imperfect sequences [] total 18 [2021-10-16 02:14:29,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701992449] [2021-10-16 02:14:29,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 02:14:29,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:29,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 02:14:29,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:14:29,944 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:31,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:31,389 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2021-10-16 02:14:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:14:31,389 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 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 [2021-10-16 02:14:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:31,391 INFO L225 Difference]: With dead ends: 153 [2021-10-16 02:14:31,391 INFO L226 Difference]: Without dead ends: 153 [2021-10-16 02:14:31,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1293.9ms TimeCoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2021-10-16 02:14:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-16 02:14:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 99. [2021-10-16 02:14:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 98 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-10-16 02:14:31,396 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 43 [2021-10-16 02:14:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:31,397 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-10-16 02:14:31,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-10-16 02:14:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-16 02:14:31,398 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:31,398 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:31,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:31,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:31,602 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:14:31,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:31,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1003649362, now seen corresponding path program 1 times [2021-10-16 02:14:31,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:31,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423852191] [2021-10-16 02:14:31,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:31,603 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:31,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:31,604 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:31,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 02:14:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:32,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:14:32,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:32,294 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-10-16 02:14:32,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 28 treesize of output 42 [2021-10-16 02:14:32,376 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-10-16 02:14:32,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 63 [2021-10-16 02:14:32,706 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-10-16 02:14:32,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 53 [2021-10-16 02:14:32,821 INFO L354 Elim1Store]: treesize reduction -2, result has 108.0 percent of original size [2021-10-16 02:14:32,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 70 [2021-10-16 02:14:35,156 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:14:35,157 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 1 case distinctions, treesize of input 12 treesize of output 18 [2021-10-16 02:14:35,724 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-10-16 02:14:35,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2021-10-16 02:14:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:36,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:38,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:38,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423852191] [2021-10-16 02:14:38,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423852191] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:38,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:38,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 10 [2021-10-16 02:14:38,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106010157] [2021-10-16 02:14:38,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:14:38,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:38,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:14:38,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:14:38,120 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:41,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:41,565 INFO L93 Difference]: Finished difference Result 226 states and 235 transitions. [2021-10-16 02:14:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:14:41,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-16 02:14:41,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:41,568 INFO L225 Difference]: With dead ends: 226 [2021-10-16 02:14:41,568 INFO L226 Difference]: Without dead ends: 226 [2021-10-16 02:14:41,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2070.6ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:14:41,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-10-16 02:14:41,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 101. [2021-10-16 02:14:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 100 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) [2021-10-16 02:14:41,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2021-10-16 02:14:41,573 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 43 [2021-10-16 02:14:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:41,574 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2021-10-16 02:14:41,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2021-10-16 02:14:41,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-16 02:14:41,575 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:41,575 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:41,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:41,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:41,778 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:14:41,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:41,778 INFO L82 PathProgramCache]: Analyzing trace with hash -709520902, now seen corresponding path program 1 times [2021-10-16 02:14:41,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:41,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721206551] [2021-10-16 02:14:41,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:41,779 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:41,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:41,779 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:41,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 02:14:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:42,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:14:42,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:43,067 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 19 treesize of output 15 [2021-10-16 02:14:43,099 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 21 treesize of output 13 [2021-10-16 02:14:43,120 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:43,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:43,174 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 44 treesize of output 40 [2021-10-16 02:14:43,475 INFO L354 Elim1Store]: treesize reduction -1, result has 104.0 percent of original size [2021-10-16 02:14:43,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2021-10-16 02:14:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:44,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:44,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721206551] [2021-10-16 02:14:44,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721206551] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:44,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:44,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-10-16 02:14:44,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219616800] [2021-10-16 02:14:44,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:14:44,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:44,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:14:44,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:14:44,013 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:44,824 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2021-10-16 02:14:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:14:44,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-16 02:14:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:44,825 INFO L225 Difference]: With dead ends: 144 [2021-10-16 02:14:44,825 INFO L226 Difference]: Without dead ends: 144 [2021-10-16 02:14:44,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 320.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:14:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-16 02:14:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2021-10-16 02:14:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 76 states have (on average 1.4078947368421053) internal successors, (107), 100 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2021-10-16 02:14:44,829 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 49 [2021-10-16 02:14:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:44,829 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2021-10-16 02:14:44,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2021-10-16 02:14:44,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-16 02:14:44,831 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:44,831 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:44,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:45,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:45,042 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:14:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:45,042 INFO L82 PathProgramCache]: Analyzing trace with hash -709520901, now seen corresponding path program 1 times [2021-10-16 02:14:45,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:45,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633576367] [2021-10-16 02:14:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:45,043 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:45,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:45,043 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:45,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-16 02:14:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:45,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:14:45,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:46,746 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 17 treesize of output 13 [2021-10-16 02:14:46,753 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 11 treesize of output 7 [2021-10-16 02:14:46,809 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 31 treesize of output 23 [2021-10-16 02:14:46,812 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 20 treesize of output 12 [2021-10-16 02:14:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:46,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:47,013 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 36 treesize of output 28 [2021-10-16 02:14:47,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:14:47,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:14:47,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:14:47,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:14:47,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:47,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-10-16 02:14:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:49,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:49,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633576367] [2021-10-16 02:14:49,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633576367] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:49,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:49,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-10-16 02:14:49,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079975277] [2021-10-16 02:14:49,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:14:49,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:49,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:14:49,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:14:49,079 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:50,719 INFO L93 Difference]: Finished difference Result 163 states and 170 transitions. [2021-10-16 02:14:50,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 02:14:50,720 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-16 02:14:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:50,721 INFO L225 Difference]: With dead ends: 163 [2021-10-16 02:14:50,721 INFO L226 Difference]: Without dead ends: 163 [2021-10-16 02:14:50,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1184.9ms TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:14:50,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-16 02:14:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 101. [2021-10-16 02:14:50,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 76 states have (on average 1.394736842105263) internal successors, (106), 100 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-10-16 02:14:50,726 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 49 [2021-10-16 02:14:50,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:50,726 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-10-16 02:14:50,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:50,727 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-10-16 02:14:50,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-16 02:14:50,727 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:50,728 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:50,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:50,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:50,942 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:14:50,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:50,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1803046405, now seen corresponding path program 1 times [2021-10-16 02:14:50,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:50,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715068505] [2021-10-16 02:14:50,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:50,943 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:50,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:50,944 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:50,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 02:14:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:51,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:14:51,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:52,308 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 19 treesize of output 15 [2021-10-16 02:14:52,361 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 21 treesize of output 13 [2021-10-16 02:14:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:52,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:52,437 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 44 treesize of output 40 [2021-10-16 02:14:52,675 INFO L354 Elim1Store]: treesize reduction -1, result has 104.0 percent of original size [2021-10-16 02:14:52,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2021-10-16 02:14:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:53,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:53,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715068505] [2021-10-16 02:14:53,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715068505] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:53,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:53,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-10-16 02:14:53,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442113093] [2021-10-16 02:14:53,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:14:53,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:53,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:14:53,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:14:53,365 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:54,184 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2021-10-16 02:14:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:14:54,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-10-16 02:14:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:54,185 INFO L225 Difference]: With dead ends: 155 [2021-10-16 02:14:54,185 INFO L226 Difference]: Without dead ends: 155 [2021-10-16 02:14:54,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:14:54,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-16 02:14:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 102. [2021-10-16 02:14:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 77 states have (on average 1.4025974025974026) internal successors, (108), 101 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) [2021-10-16 02:14:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2021-10-16 02:14:54,191 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 52 [2021-10-16 02:14:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:54,191 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2021-10-16 02:14:54,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2021-10-16 02:14:54,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-16 02:14:54,192 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:54,193 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:54,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:54,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:54,415 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:14:54,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:54,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1803046404, now seen corresponding path program 1 times [2021-10-16 02:14:54,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:54,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325684748] [2021-10-16 02:14:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:54,416 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:54,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:54,417 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:54,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-16 02:14:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:55,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:14:55,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:56,511 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 11 treesize of output 7 [2021-10-16 02:14:56,517 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 17 treesize of output 13 [2021-10-16 02:14:56,596 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 31 treesize of output 23 [2021-10-16 02:14:56,599 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 20 treesize of output 12 [2021-10-16 02:14:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:56,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:56,839 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 60 treesize of output 56 [2021-10-16 02:14:56,843 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 90 treesize of output 82 [2021-10-16 02:14:57,111 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 40 treesize of output 32 [2021-10-16 02:14:57,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:57,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2021-10-16 02:14:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:14:58,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:58,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325684748] [2021-10-16 02:14:58,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325684748] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:58,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:58,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-10-16 02:14:58,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629193198] [2021-10-16 02:14:58,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:14:58,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:58,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:14:58,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:14:58,934 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:15:00,750 INFO L93 Difference]: Finished difference Result 161 states and 168 transitions. [2021-10-16 02:15:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 02:15:00,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-10-16 02:15:00,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:15:00,753 INFO L225 Difference]: With dead ends: 161 [2021-10-16 02:15:00,753 INFO L226 Difference]: Without dead ends: 161 [2021-10-16 02:15:00,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1223.9ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:15:00,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-10-16 02:15:00,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 102. [2021-10-16 02:15:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 101 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-10-16 02:15:00,757 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 52 [2021-10-16 02:15:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:15:00,758 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-10-16 02:15:00,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 16 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-10-16 02:15:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-16 02:15:00,759 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:15:00,759 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:15:00,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:15:00,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:15:00,960 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2021-10-16 02:15:00,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:15:00,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1855772065, now seen corresponding path program 1 times [2021-10-16 02:15:00,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:15:00,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056310480] [2021-10-16 02:15:00,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:15:00,961 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:15:00,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:15:00,961 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:15:00,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-16 02:15:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:15:02,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-16 02:15:02,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:15:02,351 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-10-16 02:15:02,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-10-16 02:15:02,545 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:15:02,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-10-16 02:15:03,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-16 02:15:04,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:15:04,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-10-16 02:15:04,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-10-16 02:15:04,171 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 11 treesize of output 7 [2021-10-16 02:15:04,327 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 50 treesize of output 42 [2021-10-16 02:15:04,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:15:04,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-10-16 02:15:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:15:04,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:15:04,668 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 112 treesize of output 108 [2021-10-16 02:15:12,300 INFO L354 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2021-10-16 02:15:12,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 11611 treesize of output 11399 [2021-10-16 02:15:13,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:15:13,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056310480] [2021-10-16 02:15:13,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:15:13,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [786526162] [2021-10-16 02:15:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:15:13,297 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:15:13,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:15:13,298 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:15:13,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-16 02:15:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:15:14,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-16 02:15:14,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:15:16,214 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:15:16,215 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 1 case distinctions, treesize of input 17 treesize of output 22 [2021-10-16 02:15:17,945 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-16 02:15:17,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 45 [2021-10-16 02:15:18,763 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 24 treesize of output 20 [2021-10-16 02:15:19,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:15:19,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-16 02:15:19,171 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 11 treesize of output 7 [2021-10-16 02:15:19,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2021-10-16 02:15:19,525 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 73 treesize of output 65 [2021-10-16 02:15:19,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:15:19,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 43 [2021-10-16 02:15:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:15:20,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:15:20,862 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 114 treesize of output 110 [2021-10-16 02:15:31,276 INFO L354 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2021-10-16 02:15:31,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 18486 treesize of output 17746 [2021-10-16 02:15:31,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:15:31,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771611038] [2021-10-16 02:15:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:15:31,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:15:31,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:15:31,817 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:15:31,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-16 02:15:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:15:32,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-16 02:15:32,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:15:33,030 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-10-16 02:15:33,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 37 [2021-10-16 02:15:33,212 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:15:33,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-10-16 02:15:34,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-16 02:15:34,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:15:34,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-10-16 02:15:34,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-16 02:15:34,608 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 11 treesize of output 7 [2021-10-16 02:15:34,697 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 50 treesize of output 42 [2021-10-16 02:15:34,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:15:34,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-10-16 02:15:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:15:34,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:15:34,856 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 112 treesize of output 108 [2021-10-16 02:15:36,704 INFO L354 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2021-10-16 02:15:36,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 12084 treesize of output 11872 [2021-10-16 02:15:37,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:15:37,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:15:37,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 02:15:37,048 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 02:15:37,048 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 02:15:37,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-10-16 02:15:37,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-16 02:15:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-16 02:15:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-16 02:15:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-16 02:15:37,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-16 02:15:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-16 02:15:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-16 02:15:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-16 02:15:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-16 02:15:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-16 02:15:37,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-16 02:15:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-16 02:15:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-16 02:15:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-16 02:15:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-16 02:15:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-16 02:15:37,059 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-16 02:15:37,060 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-16 02:15:37,060 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-16 02:15:37,060 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-16 02:15:37,060 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-16 02:15:37,060 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-16 02:15:37,060 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-16 02:15:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-16 02:15:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-16 02:15:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-16 02:15:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-16 02:15:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-16 02:15:37,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION [2021-10-16 02:15:37,062 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION [2021-10-16 02:15:37,062 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-10-16 02:15:37,062 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:15:37,062 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:15:37,062 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:15:37,062 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:15:37,063 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:15:37,063 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:15:37,063 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION [2021-10-16 02:15:37,063 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION [2021-10-16 02:15:37,063 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:15:37,064 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:15:37,064 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:15:37,064 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43REQUIRES_VIOLATION [2021-10-16 02:15:37,064 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44REQUIRES_VIOLATION [2021-10-16 02:15:37,064 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45REQUIRES_VIOLATION [2021-10-16 02:15:37,064 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46REQUIRES_VIOLATION [2021-10-16 02:15:37,065 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 02:15:37,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-10-16 02:15:37,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-16 02:15:37,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-16 02:15:37,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:15:37,683 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:15:37,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:15:37 BoogieIcfgContainer [2021-10-16 02:15:37,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:15:37,704 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:15:37,704 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:15:37,705 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:15:37,705 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:13:27" (3/4) ... [2021-10-16 02:15:37,712 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:15:37,712 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:15:37,713 INFO L168 Benchmark]: Toolchain (without parser) took 131776.68 ms. Allocated memory was 58.7 MB in the beginning and 169.9 MB in the end (delta: 111.1 MB). Free memory was 34.6 MB in the beginning and 109.8 MB in the end (delta: -75.2 MB). Peak memory consumption was 35.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:15:37,713 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 58.7 MB. Free memory was 38.7 MB in the beginning and 38.6 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:15:37,714 INFO L168 Benchmark]: CACSL2BoogieTranslator took 520.38 ms. Allocated memory is still 58.7 MB. Free memory was 34.4 MB in the beginning and 30.3 MB in the end (delta: 4.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:15:37,714 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.76 ms. Allocated memory is still 58.7 MB. Free memory was 30.3 MB in the beginning and 27.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:15:37,715 INFO L168 Benchmark]: Boogie Preprocessor took 37.78 ms. Allocated memory is still 58.7 MB. Free memory was 27.8 MB in the beginning and 25.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:15:37,715 INFO L168 Benchmark]: RCFGBuilder took 847.26 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 25.8 MB in the beginning and 36.0 MB in the end (delta: -10.2 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:15:37,715 INFO L168 Benchmark]: TraceAbstraction took 130302.52 ms. Allocated memory was 73.4 MB in the beginning and 169.9 MB in the end (delta: 96.5 MB). Free memory was 35.4 MB in the beginning and 109.8 MB in the end (delta: -74.5 MB). Peak memory consumption was 102.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:15:37,716 INFO L168 Benchmark]: Witness Printer took 7.97 ms. Allocated memory is still 169.9 MB. Free memory is still 109.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:15:37,718 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 58.7 MB. Free memory was 38.7 MB in the beginning and 38.6 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 520.38 ms. Allocated memory is still 58.7 MB. Free memory was 34.4 MB in the beginning and 30.3 MB in the end (delta: 4.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.76 ms. Allocated memory is still 58.7 MB. Free memory was 30.3 MB in the beginning and 27.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.78 ms. Allocated memory is still 58.7 MB. Free memory was 27.8 MB in the beginning and 25.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 847.26 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 25.8 MB in the beginning and 36.0 MB in the end (delta: -10.2 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 130302.52 ms. Allocated memory was 73.4 MB in the beginning and 169.9 MB in the end (delta: 96.5 MB). Free memory was 35.4 MB in the beginning and 109.8 MB in the end (delta: -74.5 MB). Peak memory consumption was 102.3 MB. Max. memory is 16.1 GB. * Witness Printer took 7.97 ms. Allocated memory is still 169.9 MB. Free memory is still 109.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 667]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L687] static struct L1 *list; [L641] void *ptr = malloc(nmemb * size); [L642] return memset(ptr, 0, nmemb * size); [L676] struct L1 *item = calloc_model(1U, sizeof *item); [L677] COND FALSE !(!item) [L641] void *ptr = malloc(nmemb * size); [L642] return memset(ptr, 0, nmemb * size); [L655] struct L2 *item = calloc_model(1U, sizeof *item); [L656] COND FALSE !(!item) [L658] item->proto = malloc(119U) [L659] EXPR item->proto [L659] COND FALSE !(!item->proto) [L661] EXPR \read(**list) [L661] item->next = *list [L662] *list = item [L681] COND FALSE !(__VERIFIER_nondet_int()) [L682] EXPR \read(**list) [L682] item->next = *list [L683] *list = item [L690] COND FALSE !(__VERIFIER_nondet_int()) [L692] EXPR \read(*list) [L692] EXPR list->next [L692] struct L1 *next = list->next; [L693] EXPR \read(*list) [L693] list->l2 [L667] list->next - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 658]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 658]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 659]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 659]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 661]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 661]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 661]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 661]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 662]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 662]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 683]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 683]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 692]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 692]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 692]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 692]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 667]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 669]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 669]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 669]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 697]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 697]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 106 locations, 48 error locations. Started 1 CEGAR loops. OverallTime: 130196.3ms, OverallIterations: 16, TraceHistogramMax: 8, EmptinessCheckTime: 63.1ms, AutomataDifference: 24561.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 976 SDtfs, 5364 SDslu, 3409 SDs, 0 SdLazy, 3141 SolverSat, 307 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 17997.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1346 GetRequests, 1119 SyntacticMatches, 9 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 37224.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=7, InterpolantAutomatonStates: 137, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 119.4ms AutomataMinimizationTime, 15 MinimizatonAttempts, 605 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 327.1ms SsaConstructionTime, 2910.2ms SatisfiabilityAnalysisTime, 56576.8ms InterpolantComputationTime, 655 NumberOfCodeBlocks, 627 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1268 ConstructedInterpolants, 218 QuantifiedInterpolants, 14155 SizeOfPredicates, 197 NumberOfNonLiveVariables, 3210 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 42 InterpolantComputations, 26 PerfectInterpolantSequences, 1404/1560 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-16 02:15:37,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f55d91a0-435b-479a-bfa3-f046e2864910/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...