./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/insertion_sort-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/insertion_sort-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 25b1595a40c04d1f29f2431a3990f69b3ca92105 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:57:35,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:57:35,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:57:35,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:57:35,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:57:35,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:57:35,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:57:35,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:57:35,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:57:35,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:57:35,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:57:35,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:57:35,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:57:35,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:57:35,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:57:35,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:57:35,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:57:35,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:57:35,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:57:35,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:57:35,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:57:35,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:57:35,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:57:35,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:57:35,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:57:35,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:57:35,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:57:35,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:57:35,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:57:35,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:57:35,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:57:35,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:57:35,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:57:35,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:57:35,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:57:35,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:57:35,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:57:35,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:57:35,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:57:35,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:57:35,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:57:35,368 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:57:35,400 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:57:35,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:57:35,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:57:35,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:57:35,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:57:35,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:57:35,404 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:57:35,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:57:35,405 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:57:35,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:57:35,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:57:35,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:57:35,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:57:35,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:57:35,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:57:35,413 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:57:35,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:57:35,414 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:57:35,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:57:35,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:57:35,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:57:35,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:57:35,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:57:35,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:57:35,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:57:35,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:57:35,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:57:35,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:57:35,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:57:35,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:57:35,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25b1595a40c04d1f29f2431a3990f69b3ca92105 [2021-10-13 00:57:35,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:57:35,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:57:35,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:57:35,885 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:57:35,886 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:57:35,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/loops/insertion_sort-1.c [2021-10-13 00:57:35,976 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/data/1bc529d3b/628915d93df148c691360509c0c0f87e/FLAG134a9b756 [2021-10-13 00:57:36,590 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:57:36,591 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/sv-benchmarks/c/loops/insertion_sort-1.c [2021-10-13 00:57:36,610 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/data/1bc529d3b/628915d93df148c691360509c0c0f87e/FLAG134a9b756 [2021-10-13 00:57:36,935 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/data/1bc529d3b/628915d93df148c691360509c0c0f87e [2021-10-13 00:57:36,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:57:36,941 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:57:36,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:57:36,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:57:36,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:57:36,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:57:36" (1/1) ... [2021-10-13 00:57:36,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a8f554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:57:36, skipping insertion in model container [2021-10-13 00:57:36,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:57:36" (1/1) ... [2021-10-13 00:57:36,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:57:36,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:57:37,189 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/sv-benchmarks/c/loops/insertion_sort-1.c[328,341] [2021-10-13 00:57:37,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:57:37,223 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:57:37,235 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/sv-benchmarks/c/loops/insertion_sort-1.c[328,341] [2021-10-13 00:57:37,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:57:37,264 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:57:37,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:57:37 WrapperNode [2021-10-13 00:57:37,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:57:37,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:57:37,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:57:37,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:57:37,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:57:37" (1/1) ... [2021-10-13 00:57:37,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:57:37" (1/1) ... [2021-10-13 00:57:37,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:57:37,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:57:37,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:57:37,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:57:37,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:57:37" (1/1) ... [2021-10-13 00:57:37,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:57:37" (1/1) ... [2021-10-13 00:57:37,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:57:37" (1/1) ... [2021-10-13 00:57:37,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:57:37" (1/1) ... [2021-10-13 00:57:37,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:57:37" (1/1) ... [2021-10-13 00:57:37,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:57:37" (1/1) ... [2021-10-13 00:57:37,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:57:37" (1/1) ... [2021-10-13 00:57:37,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:57:37,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:57:37,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:57:37,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:57:37,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:57:37" (1/1) ... [2021-10-13 00:57:37,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:57:37,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:57:37,390 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:57:37,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:57:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:57:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:57:37,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:57:37,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:57:37,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:57:37,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:57:37,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:57:37,720 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:57:37,720 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 00:57:37,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:57:37 BoogieIcfgContainer [2021-10-13 00:57:37,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:57:37,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:57:37,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:57:37,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:57:37,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:57:36" (1/3) ... [2021-10-13 00:57:37,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ccd2d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:57:37, skipping insertion in model container [2021-10-13 00:57:37,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:57:37" (2/3) ... [2021-10-13 00:57:37,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ccd2d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:57:37, skipping insertion in model container [2021-10-13 00:57:37,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:57:37" (3/3) ... [2021-10-13 00:57:37,735 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2021-10-13 00:57:37,743 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:57:37,743 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:57:37,809 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:57:37,818 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 00:57:37,819 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:57:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 00:57:37,846 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:57:37,847 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:57:37,848 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:57:37,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:57:37,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2015618667, now seen corresponding path program 1 times [2021-10-13 00:57:37,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:57:37,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849872052] [2021-10-13 00:57:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:37,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:57:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:57:38,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:57:38,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849872052] [2021-10-13 00:57:38,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849872052] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:57:38,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:57:38,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:57:38,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650119612] [2021-10-13 00:57:38,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:57:38,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:57:38,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:57:38,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:57:38,246 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 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 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:38,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:57:38,390 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-10-13 00:57:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:57:38,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-10-13 00:57:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:57:38,406 INFO L225 Difference]: With dead ends: 54 [2021-10-13 00:57:38,407 INFO L226 Difference]: Without dead ends: 22 [2021-10-13 00:57:38,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:57:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-13 00:57:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-10-13 00:57:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-10-13 00:57:38,450 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 9 [2021-10-13 00:57:38,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:57:38,451 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-10-13 00:57:38,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:38,451 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-10-13 00:57:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:57:38,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:57:38,452 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:57:38,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:57:38,453 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:57:38,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:57:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1565476563, now seen corresponding path program 1 times [2021-10-13 00:57:38,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:57:38,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235312821] [2021-10-13 00:57:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:38,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:57:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:57:38,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:57:38,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235312821] [2021-10-13 00:57:38,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235312821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:38,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744305010] [2021-10-13 00:57:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:38,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:38,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:57:38,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:57:38,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:57:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:38,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:57:38,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:57:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:57:39,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744305010] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:57:39,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:57:39,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2021-10-13 00:57:39,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266138302] [2021-10-13 00:57:39,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:57:39,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:57:39,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:57:39,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:57:39,184 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:57:39,310 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-10-13 00:57:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:57:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2021-10-13 00:57:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:57:39,313 INFO L225 Difference]: With dead ends: 37 [2021-10-13 00:57:39,314 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 00:57:39,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:57:39,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 00:57:39,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2021-10-13 00:57:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-13 00:57:39,325 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2021-10-13 00:57:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:57:39,326 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-13 00:57:39,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-13 00:57:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 00:57:39,330 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:57:39,332 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:57:39,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:57:39,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:39,534 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:57:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:57:39,535 INFO L82 PathProgramCache]: Analyzing trace with hash 188510022, now seen corresponding path program 1 times [2021-10-13 00:57:39,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:57:39,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651271217] [2021-10-13 00:57:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:39,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:57:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:57:39,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:57:39,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651271217] [2021-10-13 00:57:39,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651271217] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:39,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023301386] [2021-10-13 00:57:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:39,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:39,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:57:39,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:57:39,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:57:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:39,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:57:39,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:57:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:57:40,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023301386] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:40,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:57:40,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-10-13 00:57:40,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46683416] [2021-10-13 00:57:40,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:57:40,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:57:40,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:57:40,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:57:40,158 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:57:40,346 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-10-13 00:57:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:57:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 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 17 [2021-10-13 00:57:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:57:40,349 INFO L225 Difference]: With dead ends: 49 [2021-10-13 00:57:40,349 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 00:57:40,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:57:40,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 00:57:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-10-13 00:57:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-10-13 00:57:40,356 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2021-10-13 00:57:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:57:40,359 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-10-13 00:57:40,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:40,360 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-10-13 00:57:40,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:57:40,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:57:40,362 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:57:40,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:57:40,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:40,576 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:57:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:57:40,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1379565948, now seen corresponding path program 2 times [2021-10-13 00:57:40,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:57:40,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882842693] [2021-10-13 00:57:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:40,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:57:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:57:41,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:57:41,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882842693] [2021-10-13 00:57:41,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882842693] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:41,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165972664] [2021-10-13 00:57:41,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:57:41,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:41,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:57:41,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:57:41,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:57:41,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:57:41,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:57:41,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:57:41,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:57:41,827 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:57:41,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-13 00:57:42,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:57:42,006 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-13 00:57:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:57:42,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165972664] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:42,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:57:42,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-10-13 00:57:42,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316201640] [2021-10-13 00:57:42,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 00:57:42,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:57:42,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 00:57:42,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:57:42,052 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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) [2021-10-13 00:57:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:57:42,708 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-10-13 00:57:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 00:57:42,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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 19 [2021-10-13 00:57:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:57:42,711 INFO L225 Difference]: With dead ends: 75 [2021-10-13 00:57:42,711 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 00:57:42,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 675.4ms TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2021-10-13 00:57:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 00:57:42,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2021-10-13 00:57:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-10-13 00:57:42,721 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 19 [2021-10-13 00:57:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:57:42,722 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-10-13 00:57:42,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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) [2021-10-13 00:57:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-10-13 00:57:42,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 00:57:42,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:57:42,724 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:57:42,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:57:42,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:42,929 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:57:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:57:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1125897754, now seen corresponding path program 1 times [2021-10-13 00:57:42,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:57:42,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054305753] [2021-10-13 00:57:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:42,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:57:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:57:43,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:57:43,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054305753] [2021-10-13 00:57:43,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054305753] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:43,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670138256] [2021-10-13 00:57:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:43,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:43,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:57:43,160 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:57:43,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:57:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:43,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 00:57:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:57:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:57:43,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670138256] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:43,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:57:43,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-13 00:57:43,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021096866] [2021-10-13 00:57:43,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:57:43,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:57:43,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:57:43,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:57:43,478 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:43,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:57:43,661 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2021-10-13 00:57:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:57:43,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2021-10-13 00:57:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:57:43,663 INFO L225 Difference]: With dead ends: 90 [2021-10-13 00:57:43,663 INFO L226 Difference]: Without dead ends: 66 [2021-10-13 00:57:43,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:57:43,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-13 00:57:43,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2021-10-13 00:57:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 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) [2021-10-13 00:57:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2021-10-13 00:57:43,675 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 23 [2021-10-13 00:57:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:57:43,676 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2021-10-13 00:57:43,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2021-10-13 00:57:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 00:57:43,678 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:57:43,678 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:57:43,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:57:43,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:43,900 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:57:43,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:57:43,901 INFO L82 PathProgramCache]: Analyzing trace with hash -210329187, now seen corresponding path program 1 times [2021-10-13 00:57:43,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:57:43,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27279055] [2021-10-13 00:57:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:43,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:57:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:57:44,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:57:44,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27279055] [2021-10-13 00:57:44,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27279055] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:44,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12752421] [2021-10-13 00:57:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:44,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:44,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:57:44,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:57:44,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 00:57:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:44,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:57:44,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:57:44,909 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:57:44,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:57:45,329 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-10-13 00:57:45,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 59 treesize of output 42 [2021-10-13 00:57:45,713 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-10-13 00:57:45,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 45 [2021-10-13 00:57:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:57:45,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12752421] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:45,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:57:45,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-10-13 00:57:45,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507809098] [2021-10-13 00:57:45,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 00:57:45,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:57:45,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 00:57:45,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-10-13 00:57:45,762 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 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) [2021-10-13 00:57:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:57:47,607 INFO L93 Difference]: Finished difference Result 153 states and 192 transitions. [2021-10-13 00:57:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 00:57:47,608 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 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 24 [2021-10-13 00:57:47,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:57:47,611 INFO L225 Difference]: With dead ends: 153 [2021-10-13 00:57:47,611 INFO L226 Difference]: Without dead ends: 98 [2021-10-13 00:57:47,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1672.5ms TimeCoverageRelationStatistics Valid=423, Invalid=2333, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 00:57:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-13 00:57:47,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 54. [2021-10-13 00:57:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:47,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-10-13 00:57:47,643 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 24 [2021-10-13 00:57:47,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:57:47,643 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-10-13 00:57:47,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 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) [2021-10-13 00:57:47,644 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-10-13 00:57:47,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 00:57:47,646 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:57:47,646 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:57:47,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:57:47,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:47,860 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:57:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:57:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1447473291, now seen corresponding path program 3 times [2021-10-13 00:57:47,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:57:47,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683339250] [2021-10-13 00:57:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:47,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:57:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:57:48,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:57:48,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683339250] [2021-10-13 00:57:48,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683339250] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:48,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153920518] [2021-10-13 00:57:48,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:57:48,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:48,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:57:48,633 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:57:48,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 00:57:48,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:57:48,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:57:48,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 00:57:48,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:57:49,154 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:57:49,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-13 00:57:49,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:57:49,387 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-10-13 00:57:49,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-10-13 00:57:49,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:57:49,477 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-13 00:57:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:57:49,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153920518] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:49,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:57:49,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-10-13 00:57:49,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071072607] [2021-10-13 00:57:49,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 00:57:49,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:57:49,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 00:57:49,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:57:49,514 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 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) [2021-10-13 00:57:50,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:57:50,434 INFO L93 Difference]: Finished difference Result 167 states and 209 transitions. [2021-10-13 00:57:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 00:57:50,442 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 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 27 [2021-10-13 00:57:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:57:50,443 INFO L225 Difference]: With dead ends: 167 [2021-10-13 00:57:50,444 INFO L226 Difference]: Without dead ends: 135 [2021-10-13 00:57:50,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 980.9ms TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 00:57:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-13 00:57:50,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 67. [2021-10-13 00:57:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 66 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-10-13 00:57:50,464 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 27 [2021-10-13 00:57:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:57:50,464 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-10-13 00:57:50,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 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) [2021-10-13 00:57:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-10-13 00:57:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 00:57:50,467 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:57:50,467 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:57:50,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:57:50,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:50,682 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:57:50,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:57:50,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1913928053, now seen corresponding path program 2 times [2021-10-13 00:57:50,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:57:50,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399584783] [2021-10-13 00:57:50,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:50,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:57:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:57:51,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:57:51,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399584783] [2021-10-13 00:57:51,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399584783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:51,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466833598] [2021-10-13 00:57:51,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:57:51,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:51,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:57:51,095 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:57:51,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 00:57:51,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:57:51,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:57:51,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 00:57:51,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:57:51,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:57:51,651 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:57:51,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-13 00:57:51,848 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:57:51,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 52 treesize of output 28 [2021-10-13 00:57:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:57:51,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466833598] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:51,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:57:51,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2021-10-13 00:57:51,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313826306] [2021-10-13 00:57:51,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 00:57:51,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:57:51,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 00:57:51,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:57:51,883 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-10-13 00:57:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:57:52,548 INFO L93 Difference]: Finished difference Result 180 states and 225 transitions. [2021-10-13 00:57:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 00:57:52,549 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 31 [2021-10-13 00:57:52,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:57:52,551 INFO L225 Difference]: With dead ends: 180 [2021-10-13 00:57:52,551 INFO L226 Difference]: Without dead ends: 148 [2021-10-13 00:57:52,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 629.0ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 00:57:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-13 00:57:52,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 85. [2021-10-13 00:57:52,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 84 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) [2021-10-13 00:57:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2021-10-13 00:57:52,581 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 31 [2021-10-13 00:57:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:57:52,581 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2021-10-13 00:57:52,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2021-10-13 00:57:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2021-10-13 00:57:52,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 00:57:52,587 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:57:52,587 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:57:52,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:57:52,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:52,813 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:57:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:57:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash -635707062, now seen corresponding path program 1 times [2021-10-13 00:57:52,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:57:52,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101819537] [2021-10-13 00:57:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:52,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:57:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:57:53,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:57:53,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101819537] [2021-10-13 00:57:53,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101819537] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:53,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713767557] [2021-10-13 00:57:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:53,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:53,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:57:53,201 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:57:53,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 00:57:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:53,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:57:53,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:57:53,788 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:57:53,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-13 00:57:53,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:57:53,898 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-13 00:57:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:57:53,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713767557] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:53,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:57:53,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-10-13 00:57:53,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655294476] [2021-10-13 00:57:53,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 00:57:53,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:57:53,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 00:57:53,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:57:53,937 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:57:55,344 INFO L93 Difference]: Finished difference Result 237 states and 294 transitions. [2021-10-13 00:57:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-13 00:57:55,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-13 00:57:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:57:55,346 INFO L225 Difference]: With dead ends: 237 [2021-10-13 00:57:55,347 INFO L226 Difference]: Without dead ends: 205 [2021-10-13 00:57:55,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1044.5ms TimeCoverageRelationStatistics Valid=542, Invalid=2764, Unknown=0, NotChecked=0, Total=3306 [2021-10-13 00:57:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-13 00:57:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 97. [2021-10-13 00:57:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 96 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) [2021-10-13 00:57:55,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2021-10-13 00:57:55,381 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 32 [2021-10-13 00:57:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:57:55,385 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2021-10-13 00:57:55,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2021-10-13 00:57:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 00:57:55,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:57:55,420 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:57:55,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:57:55,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:55,621 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:57:55,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:57:55,621 INFO L82 PathProgramCache]: Analyzing trace with hash 222375954, now seen corresponding path program 2 times [2021-10-13 00:57:55,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:57:55,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139979803] [2021-10-13 00:57:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:55,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:57:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:57:56,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:57:56,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139979803] [2021-10-13 00:57:56,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139979803] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:56,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947565819] [2021-10-13 00:57:56,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:57:56,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:56,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:57:56,392 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:57:56,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 00:57:56,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:57:56,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:57:56,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 00:57:56,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:57:56,866 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:57:56,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:57:57,225 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-10-13 00:57:57,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 57 treesize of output 38 [2021-10-13 00:57:57,533 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-10-13 00:57:57,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 [2021-10-13 00:57:57,745 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-10-13 00:57:57,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 61 treesize of output 39 [2021-10-13 00:57:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:57:57,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947565819] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:57,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:57:57,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-10-13 00:57:57,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380598725] [2021-10-13 00:57:57,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 00:57:57,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:57:57,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 00:57:57,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 00:57:57,789 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 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) [2021-10-13 00:57:59,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:57:59,217 INFO L93 Difference]: Finished difference Result 181 states and 222 transitions. [2021-10-13 00:57:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 00:57:59,218 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 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 32 [2021-10-13 00:57:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:57:59,219 INFO L225 Difference]: With dead ends: 181 [2021-10-13 00:57:59,219 INFO L226 Difference]: Without dead ends: 179 [2021-10-13 00:57:59,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1401.4ms TimeCoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 00:57:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-13 00:57:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 101. [2021-10-13 00:57:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.25) internal successors, (125), 100 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:59,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2021-10-13 00:57:59,238 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 32 [2021-10-13 00:57:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:57:59,239 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2021-10-13 00:57:59,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 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) [2021-10-13 00:57:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2021-10-13 00:57:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 00:57:59,241 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:57:59,241 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:57:59,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-13 00:57:59,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 00:57:59,448 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:57:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:57:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1757363551, now seen corresponding path program 3 times [2021-10-13 00:57:59,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:57:59,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716212265] [2021-10-13 00:57:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:57:59,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:57:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:57:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 00:57:59,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:57:59,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716212265] [2021-10-13 00:57:59,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716212265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:57:59,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687210608] [2021-10-13 00:57:59,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:57:59,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:59,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:57:59,661 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:57:59,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 00:58:00,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:58:00,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:00,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 00:58:00,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:58:00,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687210608] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:00,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:00,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-10-13 00:58:00,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875878165] [2021-10-13 00:58:00,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:58:00,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:00,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:58:00,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:58:00,305 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:00,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:00,544 INFO L93 Difference]: Finished difference Result 290 states and 364 transitions. [2021-10-13 00:58:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:58:00,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-13 00:58:00,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:00,549 INFO L225 Difference]: With dead ends: 290 [2021-10-13 00:58:00,549 INFO L226 Difference]: Without dead ends: 224 [2021-10-13 00:58:00,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:58:00,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-10-13 00:58:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2021-10-13 00:58:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.2154696132596685) internal successors, (220), 181 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 220 transitions. [2021-10-13 00:58:00,572 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 220 transitions. Word has length 35 [2021-10-13 00:58:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:00,572 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 220 transitions. [2021-10-13 00:58:00,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:00,573 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 220 transitions. [2021-10-13 00:58:00,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 00:58:00,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:00,574 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:00,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:00,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:00,800 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:00,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1000905248, now seen corresponding path program 1 times [2021-10-13 00:58:00,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:00,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902272046] [2021-10-13 00:58:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:00,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:01,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:01,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902272046] [2021-10-13 00:58:01,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902272046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:01,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016101447] [2021-10-13 00:58:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:01,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:01,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:01,256 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:01,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 00:58:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:01,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 00:58:01,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:01,821 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:58:01,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:58:02,268 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-10-13 00:58:02,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 42 [2021-10-13 00:58:02,565 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:58:02,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 54 treesize of output 30 [2021-10-13 00:58:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:58:02,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016101447] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:02,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:02,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 26 [2021-10-13 00:58:02,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083343743] [2021-10-13 00:58:02,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 00:58:02,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:02,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 00:58:02,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-10-13 00:58:02,612 INFO L87 Difference]: Start difference. First operand 182 states and 220 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:04,129 INFO L93 Difference]: Finished difference Result 330 states and 397 transitions. [2021-10-13 00:58:04,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 00:58:04,129 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-13 00:58:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:04,132 INFO L225 Difference]: With dead ends: 330 [2021-10-13 00:58:04,132 INFO L226 Difference]: Without dead ends: 248 [2021-10-13 00:58:04,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1296.8ms TimeCoverageRelationStatistics Valid=510, Invalid=2460, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 00:58:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-10-13 00:58:04,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 183. [2021-10-13 00:58:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.2087912087912087) internal successors, (220), 182 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2021-10-13 00:58:04,163 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 36 [2021-10-13 00:58:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:04,164 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2021-10-13 00:58:04,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:04,164 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2021-10-13 00:58:04,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 00:58:04,165 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:04,166 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:04,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:04,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-13 00:58:04,384 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:04,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:04,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1716712809, now seen corresponding path program 3 times [2021-10-13 00:58:04,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:04,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136692225] [2021-10-13 00:58:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:04,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:58:04,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:04,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136692225] [2021-10-13 00:58:04,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136692225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:04,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113292186] [2021-10-13 00:58:04,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:58:04,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:04,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:04,842 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:04,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 00:58:05,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 00:58:05,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:05,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 00:58:05,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:05,377 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:58:05,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:58:05,602 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-10-13 00:58:05,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 58 treesize of output 39 [2021-10-13 00:58:05,832 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-10-13 00:58:05,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 42 [2021-10-13 00:58:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 00:58:05,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113292186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:05,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:05,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-10-13 00:58:05,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097439621] [2021-10-13 00:58:05,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 00:58:05,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:05,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 00:58:05,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-10-13 00:58:05,887 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:08,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:08,431 INFO L93 Difference]: Finished difference Result 329 states and 395 transitions. [2021-10-13 00:58:08,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-13 00:58:08,432 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 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 37 [2021-10-13 00:58:08,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:08,434 INFO L225 Difference]: With dead ends: 329 [2021-10-13 00:58:08,434 INFO L226 Difference]: Without dead ends: 223 [2021-10-13 00:58:08,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 2115.4ms TimeCoverageRelationStatistics Valid=905, Invalid=6405, Unknown=0, NotChecked=0, Total=7310 [2021-10-13 00:58:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-10-13 00:58:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 149. [2021-10-13 00:58:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 148 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2021-10-13 00:58:08,462 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 37 [2021-10-13 00:58:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:08,462 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2021-10-13 00:58:08,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2021-10-13 00:58:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 00:58:08,464 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:08,464 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:08,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:08,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-13 00:58:08,689 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:08,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:08,690 INFO L82 PathProgramCache]: Analyzing trace with hash -336019396, now seen corresponding path program 4 times [2021-10-13 00:58:08,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:08,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754731121] [2021-10-13 00:58:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:08,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:58:09,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:09,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754731121] [2021-10-13 00:58:09,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754731121] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:09,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873164752] [2021-10-13 00:58:09,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:58:09,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:09,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:09,015 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:09,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 00:58:09,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:58:09,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:09,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 00:58:09,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:09,510 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 15 treesize of output 11 [2021-10-13 00:58:09,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:09,696 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 28 treesize of output 27 [2021-10-13 00:58:09,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:09,865 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-10-13 00:58:09,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-10-13 00:58:10,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:58:10,038 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-13 00:58:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 00:58:10,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873164752] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:10,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:10,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-10-13 00:58:10,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161393738] [2021-10-13 00:58:10,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 00:58:10,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:10,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 00:58:10,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-10-13 00:58:10,070 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 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) [2021-10-13 00:58:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:10,790 INFO L93 Difference]: Finished difference Result 223 states and 266 transitions. [2021-10-13 00:58:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 00:58:10,790 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-13 00:58:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:10,792 INFO L225 Difference]: With dead ends: 223 [2021-10-13 00:58:10,792 INFO L226 Difference]: Without dead ends: 178 [2021-10-13 00:58:10,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 698.8ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 00:58:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-13 00:58:10,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 150. [2021-10-13 00:58:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.174496644295302) internal successors, (175), 149 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 175 transitions. [2021-10-13 00:58:10,814 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 175 transitions. Word has length 39 [2021-10-13 00:58:10,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:10,815 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 175 transitions. [2021-10-13 00:58:10,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 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) [2021-10-13 00:58:10,815 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 175 transitions. [2021-10-13 00:58:10,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 00:58:10,816 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:10,816 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:10,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:11,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:11,032 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:11,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1292986487, now seen corresponding path program 1 times [2021-10-13 00:58:11,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:11,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513524317] [2021-10-13 00:58:11,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:11,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:11,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:11,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513524317] [2021-10-13 00:58:11,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513524317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:11,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983120600] [2021-10-13 00:58:11,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:11,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:11,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:11,827 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:11,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 00:58:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:12,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 00:58:12,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:12,449 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:58:12,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-13 00:58:12,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:12,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:12,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:12,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:58:12,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-10-13 00:58:13,193 INFO L354 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2021-10-13 00:58:13,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 46 [2021-10-13 00:58:13,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:58:13,315 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-13 00:58:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 00:58:13,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983120600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:13,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:13,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 29 [2021-10-13 00:58:13,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068708426] [2021-10-13 00:58:13,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 00:58:13,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:13,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 00:58:13,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-10-13 00:58:13,354 INFO L87 Difference]: Start difference. First operand 150 states and 175 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:15,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:15,422 INFO L93 Difference]: Finished difference Result 325 states and 387 transitions. [2021-10-13 00:58:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 00:58:15,422 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 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 40 [2021-10-13 00:58:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:15,424 INFO L225 Difference]: With dead ends: 325 [2021-10-13 00:58:15,425 INFO L226 Difference]: Without dead ends: 280 [2021-10-13 00:58:15,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1809.2ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-10-13 00:58:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-13 00:58:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 173. [2021-10-13 00:58:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.2093023255813953) internal successors, (208), 172 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:15,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 208 transitions. [2021-10-13 00:58:15,454 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 208 transitions. Word has length 40 [2021-10-13 00:58:15,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:15,455 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 208 transitions. [2021-10-13 00:58:15,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:15,455 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 208 transitions. [2021-10-13 00:58:15,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 00:58:15,456 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:15,456 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:15,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:15,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:15,664 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:15,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:15,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1122199553, now seen corresponding path program 2 times [2021-10-13 00:58:15,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:15,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099123316] [2021-10-13 00:58:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:15,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:16,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:16,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099123316] [2021-10-13 00:58:16,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099123316] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:16,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86094801] [2021-10-13 00:58:16,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:58:16,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:16,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:16,409 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:16,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 00:58:16,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:58:16,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:16,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 00:58:16,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:17,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:17,264 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 [2021-10-13 00:58:17,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:17,442 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-10-13 00:58:17,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-10-13 00:58:17,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:58:17,510 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-13 00:58:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 00:58:17,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86094801] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:17,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:17,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 31 [2021-10-13 00:58:17,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868024048] [2021-10-13 00:58:17,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 00:58:17,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:17,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 00:58:17,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-10-13 00:58:17,534 INFO L87 Difference]: Start difference. First operand 173 states and 208 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:19,652 INFO L93 Difference]: Finished difference Result 293 states and 350 transitions. [2021-10-13 00:58:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-13 00:58:19,653 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-13 00:58:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:19,655 INFO L225 Difference]: With dead ends: 293 [2021-10-13 00:58:19,655 INFO L226 Difference]: Without dead ends: 249 [2021-10-13 00:58:19,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 1831.8ms TimeCoverageRelationStatistics Valid=859, Invalid=3971, Unknown=0, NotChecked=0, Total=4830 [2021-10-13 00:58:19,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-10-13 00:58:19,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 164. [2021-10-13 00:58:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1901840490797546) internal successors, (194), 163 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 194 transitions. [2021-10-13 00:58:19,686 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 194 transitions. Word has length 40 [2021-10-13 00:58:19,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:19,686 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 194 transitions. [2021-10-13 00:58:19,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:19,687 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 194 transitions. [2021-10-13 00:58:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 00:58:19,688 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:19,688 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:19,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-13 00:58:19,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-13 00:58:19,907 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:19,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:19,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1721163603, now seen corresponding path program 1 times [2021-10-13 00:58:19,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:19,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72505116] [2021-10-13 00:58:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:19,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:21,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:21,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72505116] [2021-10-13 00:58:21,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72505116] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:21,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7459100] [2021-10-13 00:58:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:21,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:21,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:21,054 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:21,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 00:58:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:21,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 00:58:21,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:21,840 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:58:21,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-13 00:58:21,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2021-10-13 00:58:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:21,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:21,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:21,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:21,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2021-10-13 00:58:22,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:22,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:22,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:22,289 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-10-13 00:58:22,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 39 [2021-10-13 00:58:22,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:22,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:22,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:22,611 INFO L354 Elim1Store]: treesize reduction 114, result has 25.0 percent of original size [2021-10-13 00:58:22,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 59 [2021-10-13 00:58:22,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:58:22,788 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-13 00:58:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:58:22,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7459100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:22,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:22,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 35 [2021-10-13 00:58:22,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132861118] [2021-10-13 00:58:22,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 00:58:22,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:22,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 00:58:22,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 00:58:22,833 INFO L87 Difference]: Start difference. First operand 164 states and 194 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:24,811 INFO L93 Difference]: Finished difference Result 226 states and 262 transitions. [2021-10-13 00:58:24,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 00:58:24,811 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-13 00:58:24,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:24,813 INFO L225 Difference]: With dead ends: 226 [2021-10-13 00:58:24,813 INFO L226 Difference]: Without dead ends: 198 [2021-10-13 00:58:24,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 2110.4ms TimeCoverageRelationStatistics Valid=492, Invalid=3540, Unknown=0, NotChecked=0, Total=4032 [2021-10-13 00:58:24,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-13 00:58:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-10-13 00:58:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1761363636363635) internal successors, (207), 176 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 207 transitions. [2021-10-13 00:58:24,838 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 207 transitions. Word has length 41 [2021-10-13 00:58:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:24,839 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 207 transitions. [2021-10-13 00:58:24,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 207 transitions. [2021-10-13 00:58:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 00:58:24,840 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:24,840 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:24,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-10-13 00:58:25,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-13 00:58:25,068 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:25,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:25,069 INFO L82 PathProgramCache]: Analyzing trace with hash -840467502, now seen corresponding path program 5 times [2021-10-13 00:58:25,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:25,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452835353] [2021-10-13 00:58:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:25,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:58:25,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:25,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452835353] [2021-10-13 00:58:25,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452835353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:25,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49260575] [2021-10-13 00:58:25,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:58:25,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:25,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:25,556 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:25,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 00:58:26,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-13 00:58:26,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:26,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 00:58:26,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:26,506 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 15 treesize of output 11 [2021-10-13 00:58:26,636 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:58:26,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-13 00:58:26,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:58:26,883 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-13 00:58:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:58:26,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49260575] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:26,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:26,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2021-10-13 00:58:26,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192803454] [2021-10-13 00:58:26,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 00:58:26,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:26,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 00:58:26,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:58:26,911 INFO L87 Difference]: Start difference. First operand 177 states and 207 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:27,758 INFO L93 Difference]: Finished difference Result 344 states and 417 transitions. [2021-10-13 00:58:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 00:58:27,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-13 00:58:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:27,760 INFO L225 Difference]: With dead ends: 344 [2021-10-13 00:58:27,761 INFO L226 Difference]: Without dead ends: 300 [2021-10-13 00:58:27,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 615.5ms TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2021-10-13 00:58:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-10-13 00:58:27,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 216. [2021-10-13 00:58:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.2) internal successors, (258), 215 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 258 transitions. [2021-10-13 00:58:27,794 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 258 transitions. Word has length 43 [2021-10-13 00:58:27,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:27,795 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 258 transitions. [2021-10-13 00:58:27,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 258 transitions. [2021-10-13 00:58:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-13 00:58:27,796 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:27,796 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:27,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:28,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 00:58:28,003 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:28,004 INFO L82 PathProgramCache]: Analyzing trace with hash 632000141, now seen corresponding path program 1 times [2021-10-13 00:58:28,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:28,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301695347] [2021-10-13 00:58:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:28,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:58:28,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:28,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301695347] [2021-10-13 00:58:28,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301695347] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:28,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551223115] [2021-10-13 00:58:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:28,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:28,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:28,274 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:28,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 00:58:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:28,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 00:58:28,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:29,096 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:58:29,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 00:58:29,206 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:58:29,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 52 treesize of output 28 [2021-10-13 00:58:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 00:58:29,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551223115] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:29,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:29,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 21 [2021-10-13 00:58:29,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829011605] [2021-10-13 00:58:29,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 00:58:29,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:29,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 00:58:29,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:58:29,249 INFO L87 Difference]: Start difference. First operand 216 states and 258 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:30,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:30,191 INFO L93 Difference]: Finished difference Result 366 states and 443 transitions. [2021-10-13 00:58:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 00:58:30,192 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-13 00:58:30,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:30,194 INFO L225 Difference]: With dead ends: 366 [2021-10-13 00:58:30,195 INFO L226 Difference]: Without dead ends: 322 [2021-10-13 00:58:30,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 611.1ms TimeCoverageRelationStatistics Valid=353, Invalid=1903, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 00:58:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-10-13 00:58:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 230. [2021-10-13 00:58:30,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.205240174672489) internal successors, (276), 229 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 276 transitions. [2021-10-13 00:58:30,235 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 276 transitions. Word has length 44 [2021-10-13 00:58:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:30,235 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 276 transitions. [2021-10-13 00:58:30,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 276 transitions. [2021-10-13 00:58:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-13 00:58:30,237 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:30,237 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:30,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:30,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:30,440 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:30,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:30,442 INFO L82 PathProgramCache]: Analyzing trace with hash 906213909, now seen corresponding path program 2 times [2021-10-13 00:58:30,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:30,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558939214] [2021-10-13 00:58:30,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:30,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:58:30,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:30,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558939214] [2021-10-13 00:58:30,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558939214] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:30,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061782196] [2021-10-13 00:58:30,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:58:30,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:30,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:30,984 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:30,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 00:58:31,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:58:31,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:31,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 00:58:31,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:31,790 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:58:31,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2021-10-13 00:58:32,087 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-10-13 00:58:32,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 59 treesize of output 40 [2021-10-13 00:58:32,234 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-13 00:58:32,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 39 [2021-10-13 00:58:32,353 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:58:32,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 54 treesize of output 30 [2021-10-13 00:58:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 00:58:32,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061782196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:32,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:32,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 29 [2021-10-13 00:58:32,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129487520] [2021-10-13 00:58:32,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 00:58:32,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:32,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 00:58:32,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-10-13 00:58:32,388 INFO L87 Difference]: Start difference. First operand 230 states and 276 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 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) [2021-10-13 00:58:33,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:33,460 INFO L93 Difference]: Finished difference Result 289 states and 344 transitions. [2021-10-13 00:58:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 00:58:33,461 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-13 00:58:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:33,462 INFO L225 Difference]: With dead ends: 289 [2021-10-13 00:58:33,462 INFO L226 Difference]: Without dead ends: 287 [2021-10-13 00:58:33,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 968.9ms TimeCoverageRelationStatistics Valid=272, Invalid=1890, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 00:58:33,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-13 00:58:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 234. [2021-10-13 00:58:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.2145922746781115) internal successors, (283), 233 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 283 transitions. [2021-10-13 00:58:33,496 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 283 transitions. Word has length 44 [2021-10-13 00:58:33,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:33,497 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 283 transitions. [2021-10-13 00:58:33,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 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) [2021-10-13 00:58:33,497 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 283 transitions. [2021-10-13 00:58:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-13 00:58:33,498 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:33,499 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:33,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:33,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:33,709 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:33,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1747430856, now seen corresponding path program 4 times [2021-10-13 00:58:33,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:33,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188712409] [2021-10-13 00:58:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:33,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:34,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:34,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188712409] [2021-10-13 00:58:34,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188712409] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:34,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877910899] [2021-10-13 00:58:34,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:58:34,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:34,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:34,661 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:34,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 00:58:35,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:58:35,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:35,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 00:58:35,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:35,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:35,794 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 36 treesize of output 27 [2021-10-13 00:58:36,003 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-10-13 00:58:36,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 58 treesize of output 39 [2021-10-13 00:58:36,389 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-10-13 00:58:36,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 49 treesize of output 51 [2021-10-13 00:58:36,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:58:36,563 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2021-10-13 00:58:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 00:58:36,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877910899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:36,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:36,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-10-13 00:58:36,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015889665] [2021-10-13 00:58:36,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 00:58:36,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:36,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 00:58:36,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 00:58:36,609 INFO L87 Difference]: Start difference. First operand 234 states and 283 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 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) [2021-10-13 00:58:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:40,528 INFO L93 Difference]: Finished difference Result 424 states and 507 transitions. [2021-10-13 00:58:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-10-13 00:58:40,529 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 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 45 [2021-10-13 00:58:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:40,531 INFO L225 Difference]: With dead ends: 424 [2021-10-13 00:58:40,531 INFO L226 Difference]: Without dead ends: 367 [2021-10-13 00:58:40,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2997 ImplicationChecksByTransitivity, 3561.7ms TimeCoverageRelationStatistics Valid=1101, Invalid=8211, Unknown=0, NotChecked=0, Total=9312 [2021-10-13 00:58:40,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-10-13 00:58:40,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 240. [2021-10-13 00:58:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.209205020920502) internal successors, (289), 239 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 289 transitions. [2021-10-13 00:58:40,581 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 289 transitions. Word has length 45 [2021-10-13 00:58:40,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:40,581 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 289 transitions. [2021-10-13 00:58:40,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 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) [2021-10-13 00:58:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 289 transitions. [2021-10-13 00:58:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-13 00:58:40,583 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:40,583 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:40,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:40,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:40,788 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:40,789 INFO L82 PathProgramCache]: Analyzing trace with hash 994889206, now seen corresponding path program 1 times [2021-10-13 00:58:40,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:40,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457625124] [2021-10-13 00:58:40,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:40,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 00:58:41,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:41,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457625124] [2021-10-13 00:58:41,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457625124] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:41,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160816498] [2021-10-13 00:58:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:41,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:41,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:41,589 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:41,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 00:58:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:42,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 00:58:42,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:42,568 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:58:42,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:58:42,981 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-10-13 00:58:42,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 59 treesize of output 42 [2021-10-13 00:58:43,350 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-10-13 00:58:43,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 [2021-10-13 00:58:43,948 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-10-13 00:58:43,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 52 treesize of output 54 [2021-10-13 00:58:44,170 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-10-13 00:58:44,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 45 [2021-10-13 00:58:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-13 00:58:44,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160816498] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:44,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:44,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2021-10-13 00:58:44,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536023345] [2021-10-13 00:58:44,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-13 00:58:44,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:44,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-13 00:58:44,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1303, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 00:58:44,206 INFO L87 Difference]: Start difference. First operand 240 states and 289 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:45,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:45,757 INFO L93 Difference]: Finished difference Result 332 states and 396 transitions. [2021-10-13 00:58:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 00:58:45,760 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 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 45 [2021-10-13 00:58:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:45,762 INFO L225 Difference]: With dead ends: 332 [2021-10-13 00:58:45,762 INFO L226 Difference]: Without dead ends: 330 [2021-10-13 00:58:45,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 1720.8ms TimeCoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2021-10-13 00:58:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-10-13 00:58:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 259. [2021-10-13 00:58:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.2209302325581395) internal successors, (315), 258 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 315 transitions. [2021-10-13 00:58:45,813 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 315 transitions. Word has length 45 [2021-10-13 00:58:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:45,814 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 315 transitions. [2021-10-13 00:58:45,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 315 transitions. [2021-10-13 00:58:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 00:58:45,815 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:45,816 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:45,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:46,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-13 00:58:46,032 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:46,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:46,033 INFO L82 PathProgramCache]: Analyzing trace with hash -583456118, now seen corresponding path program 2 times [2021-10-13 00:58:46,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:46,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163763014] [2021-10-13 00:58:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:46,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:47,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:47,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163763014] [2021-10-13 00:58:47,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163763014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:47,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938077454] [2021-10-13 00:58:47,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:58:47,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:47,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:47,096 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:47,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 00:58:47,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:58:47,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:47,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 00:58:47,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:48,105 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:58:48,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:58:48,355 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-10-13 00:58:48,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 41 [2021-10-13 00:58:48,630 INFO L354 Elim1Store]: treesize reduction 172, result has 17.3 percent of original size [2021-10-13 00:58:48,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 56 treesize of output 61 [2021-10-13 00:58:49,049 INFO L354 Elim1Store]: treesize reduction 363, result has 6.9 percent of original size [2021-10-13 00:58:49,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 61 [2021-10-13 00:58:49,416 INFO L354 Elim1Store]: treesize reduction 147, result has 22.6 percent of original size [2021-10-13 00:58:49,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 63 treesize of output 70 [2021-10-13 00:58:49,768 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-10-13 00:58:49,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 61 treesize of output 37 [2021-10-13 00:58:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:58:49,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938077454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:49,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:49,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2021-10-13 00:58:49,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396766076] [2021-10-13 00:58:49,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-13 00:58:49,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:49,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-13 00:58:49,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2200, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 00:58:49,840 INFO L87 Difference]: Start difference. First operand 259 states and 315 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 50 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:53,624 INFO L93 Difference]: Finished difference Result 398 states and 486 transitions. [2021-10-13 00:58:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 00:58:53,625 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 50 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-13 00:58:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:53,628 INFO L225 Difference]: With dead ends: 398 [2021-10-13 00:58:53,628 INFO L226 Difference]: Without dead ends: 360 [2021-10-13 00:58:53,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 3577.6ms TimeCoverageRelationStatistics Valid=834, Invalid=7356, Unknown=0, NotChecked=0, Total=8190 [2021-10-13 00:58:53,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-10-13 00:58:53,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 286. [2021-10-13 00:58:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.2771929824561403) internal successors, (364), 285 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 364 transitions. [2021-10-13 00:58:53,678 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 364 transitions. Word has length 46 [2021-10-13 00:58:53,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:53,678 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 364 transitions. [2021-10-13 00:58:53,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 50 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:53,679 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 364 transitions. [2021-10-13 00:58:53,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 00:58:53,680 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:53,680 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:53,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:53,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:53,904 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:53,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:53,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1547861096, now seen corresponding path program 6 times [2021-10-13 00:58:53,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:53,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292355837] [2021-10-13 00:58:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:53,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 00:58:54,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:54,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292355837] [2021-10-13 00:58:54,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292355837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:54,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198269088] [2021-10-13 00:58:54,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:58:54,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:54,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:54,125 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:54,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 00:58:55,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-13 00:58:55,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:55,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 00:58:55,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 00:58:55,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198269088] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:55,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:55,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-10-13 00:58:55,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666642149] [2021-10-13 00:58:55,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 00:58:55,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 00:58:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:58:55,741 INFO L87 Difference]: Start difference. First operand 286 states and 364 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:56,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:58:56,260 INFO L93 Difference]: Finished difference Result 745 states and 948 transitions. [2021-10-13 00:58:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:58:56,260 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-13 00:58:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:58:56,264 INFO L225 Difference]: With dead ends: 745 [2021-10-13 00:58:56,265 INFO L226 Difference]: Without dead ends: 584 [2021-10-13 00:58:56,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 326.5ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:58:56,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-10-13 00:58:56,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 422. [2021-10-13 00:58:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.2304038004750595) internal successors, (518), 421 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 518 transitions. [2021-10-13 00:58:56,368 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 518 transitions. Word has length 47 [2021-10-13 00:58:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:58:56,368 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 518 transitions. [2021-10-13 00:58:56,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:58:56,369 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 518 transitions. [2021-10-13 00:58:56,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-13 00:58:56,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:58:56,371 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:58:56,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:56,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:56,596 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:58:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:58:56,597 INFO L82 PathProgramCache]: Analyzing trace with hash 972601763, now seen corresponding path program 2 times [2021-10-13 00:58:56,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:58:56,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019025960] [2021-10-13 00:58:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:56,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:58:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:57,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:58:57,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019025960] [2021-10-13 00:58:57,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019025960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:57,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195106336] [2021-10-13 00:58:57,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:58:57,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:57,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:57,231 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:57,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 00:58:58,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:58:58,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:58:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 00:58:58,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:58,639 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:58:58,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 00:58:58,972 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-13 00:58:58,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 37 [2021-10-13 00:58:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 00:58:59,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195106336] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:58:59,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:58:59,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 23 [2021-10-13 00:58:59,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647297385] [2021-10-13 00:58:59,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 00:58:59,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:58:59,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 00:58:59,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:58:59,012 INFO L87 Difference]: Start difference. First operand 422 states and 518 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:59:00,118 INFO L93 Difference]: Finished difference Result 491 states and 604 transitions. [2021-10-13 00:59:00,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 00:59:00,119 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-10-13 00:59:00,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:59:00,121 INFO L225 Difference]: With dead ends: 491 [2021-10-13 00:59:00,121 INFO L226 Difference]: Without dead ends: 474 [2021-10-13 00:59:00,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 857.3ms TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 00:59:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-10-13 00:59:00,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 411. [2021-10-13 00:59:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.221951219512195) internal successors, (501), 410 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 501 transitions. [2021-10-13 00:59:00,214 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 501 transitions. Word has length 48 [2021-10-13 00:59:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:59:00,214 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 501 transitions. [2021-10-13 00:59:00,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 501 transitions. [2021-10-13 00:59:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 00:59:00,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:59:00,217 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:59:00,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 00:59:00,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 00:59:00,444 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:59:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:59:00,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2023640862, now seen corresponding path program 1 times [2021-10-13 00:59:00,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:59:00,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320142822] [2021-10-13 00:59:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:59:00,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:59:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:59:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 16 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 00:59:00,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:59:00,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320142822] [2021-10-13 00:59:00,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320142822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:00,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854532953] [2021-10-13 00:59:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:59:00,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:00,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:59:00,925 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:59:00,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 00:59:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:59:02,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 00:59:02,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:59:02,400 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:59:02,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:59:02,677 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-10-13 00:59:02,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 42 [2021-10-13 00:59:02,823 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:59:02,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 54 treesize of output 30 [2021-10-13 00:59:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 00:59:02,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854532953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:02,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:59:02,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 29 [2021-10-13 00:59:02,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868564335] [2021-10-13 00:59:02,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 00:59:02,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:59:02,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 00:59:02,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-10-13 00:59:02,857 INFO L87 Difference]: Start difference. First operand 411 states and 501 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:59:05,288 INFO L93 Difference]: Finished difference Result 567 states and 683 transitions. [2021-10-13 00:59:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 00:59:05,289 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 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 [2021-10-13 00:59:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:59:05,291 INFO L225 Difference]: With dead ends: 567 [2021-10-13 00:59:05,291 INFO L226 Difference]: Without dead ends: 496 [2021-10-13 00:59:05,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1609.5ms TimeCoverageRelationStatistics Valid=659, Invalid=4891, Unknown=0, NotChecked=0, Total=5550 [2021-10-13 00:59:05,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-10-13 00:59:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 414. [2021-10-13 00:59:05,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.2106537530266344) internal successors, (500), 413 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:05,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 500 transitions. [2021-10-13 00:59:05,375 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 500 transitions. Word has length 49 [2021-10-13 00:59:05,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:59:05,375 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 500 transitions. [2021-10-13 00:59:05,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 500 transitions. [2021-10-13 00:59:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 00:59:05,377 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:59:05,378 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:59:05,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 00:59:05,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 00:59:05,592 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:59:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:59:05,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1769159842, now seen corresponding path program 3 times [2021-10-13 00:59:05,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:59:05,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633887693] [2021-10-13 00:59:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:59:05,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:59:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:59:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:59:06,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:59:06,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633887693] [2021-10-13 00:59:06,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633887693] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:06,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355745391] [2021-10-13 00:59:06,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:59:06,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:06,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:59:06,806 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:59:06,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-13 00:59:07,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-13 00:59:07,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:59:07,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 00:59:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:59:08,184 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:59:08,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-13 00:59:08,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 46 [2021-10-13 00:59:08,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:08,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:08,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:08,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:08,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-10-13 00:59:08,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:08,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:08,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:08,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:08,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:08,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:08,610 INFO L354 Elim1Store]: treesize reduction 121, result has 8.3 percent of original size [2021-10-13 00:59:08,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 60 treesize of output 48 [2021-10-13 00:59:09,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:09,064 INFO L354 Elim1Store]: treesize reduction 187, result has 12.6 percent of original size [2021-10-13 00:59:09,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 61 treesize of output 53 [2021-10-13 00:59:09,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2021-10-13 00:59:09,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:09,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:09,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:09,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:09,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 31 [2021-10-13 00:59:09,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:59:09,468 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-13 00:59:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 00:59:09,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355745391] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:09,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:59:09,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 38 [2021-10-13 00:59:09,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445191360] [2021-10-13 00:59:09,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-13 00:59:09,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:59:09,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-13 00:59:09,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 00:59:09,507 INFO L87 Difference]: Start difference. First operand 414 states and 500 transitions. Second operand has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 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) [2021-10-13 00:59:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:59:11,700 INFO L93 Difference]: Finished difference Result 609 states and 742 transitions. [2021-10-13 00:59:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-13 00:59:11,700 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-13 00:59:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:59:11,703 INFO L225 Difference]: With dead ends: 609 [2021-10-13 00:59:11,703 INFO L226 Difference]: Without dead ends: 491 [2021-10-13 00:59:11,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 29 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2618.6ms TimeCoverageRelationStatistics Valid=607, Invalid=4363, Unknown=0, NotChecked=0, Total=4970 [2021-10-13 00:59:11,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-10-13 00:59:11,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 412. [2021-10-13 00:59:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.1995133819951338) internal successors, (493), 411 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 493 transitions. [2021-10-13 00:59:11,793 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 493 transitions. Word has length 49 [2021-10-13 00:59:11,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:59:11,794 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 493 transitions. [2021-10-13 00:59:11,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 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) [2021-10-13 00:59:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 493 transitions. [2021-10-13 00:59:11,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 00:59:11,796 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:59:11,796 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:59:11,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-13 00:59:12,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 00:59:12,022 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:59:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:59:12,023 INFO L82 PathProgramCache]: Analyzing trace with hash -184694379, now seen corresponding path program 2 times [2021-10-13 00:59:12,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:59:12,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939203595] [2021-10-13 00:59:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:59:12,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:59:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:59:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:59:12,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:59:12,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939203595] [2021-10-13 00:59:12,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939203595] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:12,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796926865] [2021-10-13 00:59:12,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:59:12,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:12,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:59:12,849 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:59:12,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 00:59:13,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:59:13,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:59:13,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 00:59:13,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:59:14,094 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-10-13 00:59:14,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:59:14,380 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-10-13 00:59:14,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 59 treesize of output 42 [2021-10-13 00:59:14,953 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-10-13 00:59:14,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 52 treesize of output 54 [2021-10-13 00:59:15,248 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-10-13 00:59:15,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 45 [2021-10-13 00:59:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-13 00:59:15,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796926865] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:15,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:59:15,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 38 [2021-10-13 00:59:15,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837981360] [2021-10-13 00:59:15,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-13 00:59:15,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:59:15,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-13 00:59:15,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 00:59:15,287 INFO L87 Difference]: Start difference. First operand 412 states and 493 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:20,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:59:20,799 INFO L93 Difference]: Finished difference Result 976 states and 1177 transitions. [2021-10-13 00:59:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-13 00:59:20,801 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-10-13 00:59:20,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:59:20,805 INFO L225 Difference]: With dead ends: 976 [2021-10-13 00:59:20,805 INFO L226 Difference]: Without dead ends: 813 [2021-10-13 00:59:20,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5699 ImplicationChecksByTransitivity, 4530.4ms TimeCoverageRelationStatistics Valid=1971, Invalid=14031, Unknown=0, NotChecked=0, Total=16002 [2021-10-13 00:59:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-10-13 00:59:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 489. [2021-10-13 00:59:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.2581967213114753) internal successors, (614), 488 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 614 transitions. [2021-10-13 00:59:20,895 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 614 transitions. Word has length 50 [2021-10-13 00:59:20,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:59:20,895 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 614 transitions. [2021-10-13 00:59:20,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:20,896 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 614 transitions. [2021-10-13 00:59:20,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 00:59:20,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:59:20,897 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:59:20,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 00:59:21,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 00:59:21,112 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:59:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:59:21,113 INFO L82 PathProgramCache]: Analyzing trace with hash 503230019, now seen corresponding path program 7 times [2021-10-13 00:59:21,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:59:21,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580014089] [2021-10-13 00:59:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:59:21,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:59:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:59:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:59:21,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:59:21,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580014089] [2021-10-13 00:59:21,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580014089] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:21,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482638510] [2021-10-13 00:59:21,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:59:21,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:21,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:59:21,817 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:59:21,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 00:59:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:59:22,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 00:59:22,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:59:23,070 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 15 treesize of output 11 [2021-10-13 00:59:23,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:23,310 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 28 treesize of output 27 [2021-10-13 00:59:23,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:23,494 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-10-13 00:59:23,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-10-13 00:59:23,693 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-13 00:59:23,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 37 [2021-10-13 00:59:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-13 00:59:23,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482638510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:23,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:59:23,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 28 [2021-10-13 00:59:23,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627372646] [2021-10-13 00:59:23,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 00:59:23,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:59:23,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 00:59:23,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-10-13 00:59:23,734 INFO L87 Difference]: Start difference. First operand 489 states and 614 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:24,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:59:24,947 INFO L93 Difference]: Finished difference Result 746 states and 933 transitions. [2021-10-13 00:59:24,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 00:59:24,948 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-10-13 00:59:24,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:59:24,952 INFO L225 Difference]: With dead ends: 746 [2021-10-13 00:59:24,952 INFO L226 Difference]: Without dead ends: 744 [2021-10-13 00:59:24,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 921.1ms TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 00:59:24,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-10-13 00:59:25,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 505. [2021-10-13 00:59:25,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.253968253968254) internal successors, (632), 504 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 632 transitions. [2021-10-13 00:59:25,098 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 632 transitions. Word has length 51 [2021-10-13 00:59:25,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:59:25,099 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 632 transitions. [2021-10-13 00:59:25,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 632 transitions. [2021-10-13 00:59:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 00:59:25,101 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:59:25,101 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:59:25,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-13 00:59:25,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-13 00:59:25,328 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:59:25,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:59:25,329 INFO L82 PathProgramCache]: Analyzing trace with hash -663049668, now seen corresponding path program 3 times [2021-10-13 00:59:25,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:59:25,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704098277] [2021-10-13 00:59:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:59:25,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:59:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:59:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:59:25,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:59:25,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704098277] [2021-10-13 00:59:25,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704098277] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:25,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483834569] [2021-10-13 00:59:25,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:59:25,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:25,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:59:25,853 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:59:25,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-13 00:59:27,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-13 00:59:27,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:59:27,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 00:59:27,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:59:27,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:27,564 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 28 treesize of output 27 [2021-10-13 00:59:27,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:27,762 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-10-13 00:59:27,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-10-13 00:59:27,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:27,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:27,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:27,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:59:27,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-10-13 00:59:28,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:59:28,179 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-13 00:59:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-13 00:59:28,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483834569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:28,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:59:28,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-10-13 00:59:28,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289570372] [2021-10-13 00:59:28,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 00:59:28,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:59:28,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 00:59:28,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 00:59:28,231 INFO L87 Difference]: Start difference. First operand 505 states and 632 transitions. Second operand has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 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) [2021-10-13 00:59:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:59:29,464 INFO L93 Difference]: Finished difference Result 827 states and 1053 transitions. [2021-10-13 00:59:29,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 00:59:29,465 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-10-13 00:59:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:59:29,468 INFO L225 Difference]: With dead ends: 827 [2021-10-13 00:59:29,468 INFO L226 Difference]: Without dead ends: 664 [2021-10-13 00:59:29,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1138.8ms TimeCoverageRelationStatistics Valid=385, Invalid=2807, Unknown=0, NotChecked=0, Total=3192 [2021-10-13 00:59:29,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-10-13 00:59:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 531. [2021-10-13 00:59:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.2528301886792452) internal successors, (664), 530 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:29,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 664 transitions. [2021-10-13 00:59:29,564 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 664 transitions. Word has length 52 [2021-10-13 00:59:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:59:29,564 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 664 transitions. [2021-10-13 00:59:29,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 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) [2021-10-13 00:59:29,565 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 664 transitions. [2021-10-13 00:59:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 00:59:29,567 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:59:29,567 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:59:29,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-13 00:59:29,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:29,788 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:59:29,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:59:29,788 INFO L82 PathProgramCache]: Analyzing trace with hash -169981182, now seen corresponding path program 4 times [2021-10-13 00:59:29,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:59:29,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119438338] [2021-10-13 00:59:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:59:29,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:59:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:59:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:59:30,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:59:30,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119438338] [2021-10-13 00:59:30,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119438338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:30,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966383313] [2021-10-13 00:59:30,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:59:30,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:30,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:59:30,193 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:59:30,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 00:59:31,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:59:31,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:59:31,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 00:59:31,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:59:31,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:31,805 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 [2021-10-13 00:59:31,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:59:31,968 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-10-13 00:59:31,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-10-13 00:59:32,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:59:32,142 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-10-13 00:59:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-13 00:59:32,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966383313] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:59:32,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:59:32,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-10-13 00:59:32,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502170140] [2021-10-13 00:59:32,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 00:59:32,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:59:32,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 00:59:32,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 00:59:32,175 INFO L87 Difference]: Start difference. First operand 531 states and 664 transitions. Second operand has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 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) [2021-10-13 00:59:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:59:33,614 INFO L93 Difference]: Finished difference Result 918 states and 1180 transitions. [2021-10-13 00:59:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 00:59:33,615 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-10-13 00:59:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:59:33,620 INFO L225 Difference]: With dead ends: 918 [2021-10-13 00:59:33,620 INFO L226 Difference]: Without dead ends: 800 [2021-10-13 00:59:33,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1065.2ms TimeCoverageRelationStatistics Valid=499, Invalid=3161, Unknown=0, NotChecked=0, Total=3660 [2021-10-13 00:59:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-10-13 00:59:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 648. [2021-10-13 00:59:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.276661514683153) internal successors, (826), 647 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:59:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 826 transitions. [2021-10-13 00:59:33,730 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 826 transitions. Word has length 52 [2021-10-13 00:59:33,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:59:33,731 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 826 transitions. [2021-10-13 00:59:33,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7058823529411766) internal successors, (92), 34 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) [2021-10-13 00:59:33,731 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 826 transitions. [2021-10-13 00:59:33,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-13 00:59:33,733 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:59:33,733 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:59:33,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-13 00:59:33,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:59:33,948 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:59:33,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:59:33,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1569114548, now seen corresponding path program 2 times [2021-10-13 00:59:33,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:59:33,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829404836] [2021-10-13 00:59:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:59:33,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:59:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:59:34,023 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:59:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:59:34,121 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:59:34,122 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:59:34,127 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:59:34,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-13 00:59:34,138 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:59:34,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:59:34 BoogieIcfgContainer [2021-10-13 00:59:34,253 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:59:34,254 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:59:34,255 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:59:34,255 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:59:34,255 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:57:37" (3/4) ... [2021-10-13 00:59:34,258 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 00:59:34,332 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edc05a10-364c-45e4-bdbc-955611e919e3/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:59:34,338 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:59:34,339 INFO L168 Benchmark]: Toolchain (without parser) took 117398.48 ms. Allocated memory was 88.1 MB in the beginning and 461.4 MB in the end (delta: 373.3 MB). Free memory was 49.2 MB in the beginning and 137.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 286.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:59:34,340 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 88.1 MB. Free memory is still 66.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:59:34,340 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.66 ms. Allocated memory was 88.1 MB in the beginning and 119.5 MB in the end (delta: 31.5 MB). Free memory was 49.1 MB in the beginning and 95.1 MB in the end (delta: -46.0 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:59:34,341 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.93 ms. Allocated memory is still 119.5 MB. Free memory was 95.1 MB in the beginning and 93.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:59:34,341 INFO L168 Benchmark]: Boogie Preprocessor took 34.53 ms. Allocated memory is still 119.5 MB. Free memory was 93.9 MB in the beginning and 92.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:59:34,341 INFO L168 Benchmark]: RCFGBuilder took 377.31 ms. Allocated memory is still 119.5 MB. Free memory was 92.4 MB in the beginning and 81.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:59:34,342 INFO L168 Benchmark]: TraceAbstraction took 116528.10 ms. Allocated memory was 119.5 MB in the beginning and 461.4 MB in the end (delta: 341.8 MB). Free memory was 81.0 MB in the beginning and 141.9 MB in the end (delta: -60.9 MB). Peak memory consumption was 284.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:59:34,342 INFO L168 Benchmark]: Witness Printer took 84.02 ms. Allocated memory is still 461.4 MB. Free memory was 141.9 MB in the beginning and 137.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:59:34,345 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 88.1 MB. Free memory is still 66.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 316.66 ms. Allocated memory was 88.1 MB in the beginning and 119.5 MB in the end (delta: 31.5 MB). Free memory was 49.1 MB in the beginning and 95.1 MB in the end (delta: -46.0 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.93 ms. Allocated memory is still 119.5 MB. Free memory was 95.1 MB in the beginning and 93.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.53 ms. Allocated memory is still 119.5 MB. Free memory was 93.9 MB in the beginning and 92.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 377.31 ms. Allocated memory is still 119.5 MB. Free memory was 92.4 MB in the beginning and 81.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 116528.10 ms. Allocated memory was 119.5 MB in the beginning and 461.4 MB in the end (delta: 341.8 MB). Free memory was 81.0 MB in the beginning and 141.9 MB in the end (delta: -60.9 MB). Peak memory consumption was 284.1 MB. Max. memory is 16.1 GB. * Witness Printer took 84.02 ms. Allocated memory is still 461.4 MB. Free memory was 141.9 MB in the beginning and 137.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. 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 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int SIZE=__VERIFIER_nondet_uint(); [L15] int i, j, k, key; [L16] int v[SIZE]; [L17] j=0 [L17] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND FALSE !(i<2) [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND TRUE i<2 [L24] EXPR v[i] [L24] v[i+1] = v[i] [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND FALSE !(j