./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa --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 b594cdd667b896d6ce097f6fd96950290806f015d929f3b2b06ffea35d861f89 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:48:34,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:48:34,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:48:34,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:48:34,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:48:34,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:48:34,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:48:34,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:48:34,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:48:34,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:48:34,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:48:34,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:48:34,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:48:34,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:48:34,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:48:34,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:48:34,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:48:34,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:48:34,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:48:34,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:48:34,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:48:34,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:48:34,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:48:34,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:48:34,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:48:34,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:48:34,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:48:34,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:48:34,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:48:34,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:48:34,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:48:34,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:48:34,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:48:34,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:48:34,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:48:34,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:48:34,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:48:34,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:48:34,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:48:34,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:48:34,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:48:34,426 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:48:34,442 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:48:34,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:48:34,443 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:48:34,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:48:34,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:48:34,444 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:48:34,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:48:34,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:48:34,445 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:48:34,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:48:34,446 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:48:34,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:48:34,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:48:34,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:48:34,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:48:34,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:48:34,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:48:34,447 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:48:34,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:48:34,447 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:48:34,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:48:34,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:48:34,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:48:34,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:48:34,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:48:34,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:48:34,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:48:34,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:48:34,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:48:34,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:48:34,448 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:48:34,448 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:48:34,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:48:34,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:48:34,449 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_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b594cdd667b896d6ce097f6fd96950290806f015d929f3b2b06ffea35d861f89 [2021-12-06 17:48:34,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:48:34,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:48:34,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:48:34,647 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:48:34,647 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:48:34,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/dll2n_remove_all.i [2021-12-06 17:48:34,688 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/data/96b4998a2/958a15fa0f41401d89c91f940485933f/FLAGe2626f27c [2021-12-06 17:48:35,108 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:48:35,108 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/sv-benchmarks/c/list-simple/dll2n_remove_all.i [2021-12-06 17:48:35,118 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/data/96b4998a2/958a15fa0f41401d89c91f940485933f/FLAGe2626f27c [2021-12-06 17:48:35,127 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/data/96b4998a2/958a15fa0f41401d89c91f940485933f [2021-12-06 17:48:35,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:48:35,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:48:35,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:48:35,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:48:35,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:48:35,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:48:35" (1/1) ... [2021-12-06 17:48:35,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b0fef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:35, skipping insertion in model container [2021-12-06 17:48:35,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:48:35" (1/1) ... [2021-12-06 17:48:35,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:48:35,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:48:35,370 WARN L230 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_e86dea46-1236-4b38-9484-c5d5ef9d69e4/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2021-12-06 17:48:35,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:48:35,378 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:48:35,407 WARN L230 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_e86dea46-1236-4b38-9484-c5d5ef9d69e4/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2021-12-06 17:48:35,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:48:35,429 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:48:35,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:35 WrapperNode [2021-12-06 17:48:35,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:48:35,430 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:48:35,430 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:48:35,430 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:48:35,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:35" (1/1) ... [2021-12-06 17:48:35,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:35" (1/1) ... [2021-12-06 17:48:35,460 INFO L137 Inliner]: procedures = 126, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-12-06 17:48:35,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:48:35,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:48:35,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:48:35,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:48:35,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:35" (1/1) ... [2021-12-06 17:48:35,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:35" (1/1) ... [2021-12-06 17:48:35,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:35" (1/1) ... [2021-12-06 17:48:35,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:35" (1/1) ... [2021-12-06 17:48:35,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:35" (1/1) ... [2021-12-06 17:48:35,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:35" (1/1) ... [2021-12-06 17:48:35,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:35" (1/1) ... [2021-12-06 17:48:35,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:48:35,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:48:35,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:48:35,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:48:35,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:35" (1/1) ... [2021-12-06 17:48:35,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:48:35,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:35,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:48:35,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:48:35,535 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-12-06 17:48:35,535 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-12-06 17:48:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:48:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 17:48:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:48:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:48:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 17:48:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 17:48:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:48:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 17:48:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:48:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:48:35,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:48:35,613 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:48:35,615 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:48:35,637 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-12-06 17:48:35,756 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:48:35,761 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:48:35,761 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 17:48:35,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:48:35 BoogieIcfgContainer [2021-12-06 17:48:35,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:48:35,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:48:35,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:48:35,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:48:35,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:48:35" (1/3) ... [2021-12-06 17:48:35,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55197224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:48:35, skipping insertion in model container [2021-12-06 17:48:35,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:35" (2/3) ... [2021-12-06 17:48:35,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55197224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:48:35, skipping insertion in model container [2021-12-06 17:48:35,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:48:35" (3/3) ... [2021-12-06 17:48:35,772 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2021-12-06 17:48:35,778 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:48:35,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:48:35,817 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:48:35,823 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-06 17:48:35,823 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:48:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 17:48:35,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:35,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:35,840 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:35,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1068252250, now seen corresponding path program 1 times [2021-12-06 17:48:35,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:35,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910223986] [2021-12-06 17:48:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:35,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:35,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:35,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910223986] [2021-12-06 17:48:35,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910223986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:35,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:35,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:48:35,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715846206] [2021-12-06 17:48:35,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:35,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:48:35,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:35,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:48:35,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:48:36,000 INFO L87 Difference]: Start difference. First operand has 24 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2021-12-06 17:48:36,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:36,015 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-12-06 17:48:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:48:36,016 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 [2021-12-06 17:48:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:36,022 INFO L225 Difference]: With dead ends: 38 [2021-12-06 17:48:36,022 INFO L226 Difference]: Without dead ends: 18 [2021-12-06 17:48:36,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:48:36,027 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:36,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-06 17:48:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-06 17:48:36,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-06 17:48:36,050 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 9 [2021-12-06 17:48:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:36,050 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-06 17:48:36,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2021-12-06 17:48:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-06 17:48:36,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 17:48:36,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:36,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:36,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:48:36,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:36,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash -751399870, now seen corresponding path program 1 times [2021-12-06 17:48:36,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:36,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599508943] [2021-12-06 17:48:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:36,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:36,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:36,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599508943] [2021-12-06 17:48:36,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599508943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:36,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:36,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:48:36,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209009962] [2021-12-06 17:48:36,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:36,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:48:36,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:36,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:48:36,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:48:36,098 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-12-06 17:48:36,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:36,109 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-12-06 17:48:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:48:36,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2021-12-06 17:48:36,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:36,110 INFO L225 Difference]: With dead ends: 34 [2021-12-06 17:48:36,110 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 17:48:36,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:48:36,111 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:36,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 17:48:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2021-12-06 17:48:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-12-06 17:48:36,115 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2021-12-06 17:48:36,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:36,116 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-12-06 17:48:36,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-12-06 17:48:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-12-06 17:48:36,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:48:36,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:36,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:36,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:48:36,117 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:36,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:36,117 INFO L85 PathProgramCache]: Analyzing trace with hash -799756430, now seen corresponding path program 1 times [2021-12-06 17:48:36,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:36,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751122580] [2021-12-06 17:48:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:36,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:36,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:36,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751122580] [2021-12-06 17:48:36,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751122580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:36,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:36,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:48:36,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306028189] [2021-12-06 17:48:36,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:36,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:48:36,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:36,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:48:36,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:48:36,188 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:36,207 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-12-06 17:48:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:48:36,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 17:48:36,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:36,208 INFO L225 Difference]: With dead ends: 39 [2021-12-06 17:48:36,208 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 17:48:36,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:48:36,210 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:36,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:36,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 17:48:36,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-06 17:48:36,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-06 17:48:36,213 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2021-12-06 17:48:36,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:36,214 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-06 17:48:36,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-06 17:48:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:48:36,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:36,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:36,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:48:36,215 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:36,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash -119698060, now seen corresponding path program 1 times [2021-12-06 17:48:36,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:36,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241743909] [2021-12-06 17:48:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:36,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:36,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:36,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241743909] [2021-12-06 17:48:36,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241743909] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:36,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502043422] [2021-12-06 17:48:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:36,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:36,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:36,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:36,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:48:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:48:36,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:36,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:36,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502043422] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:36,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:36,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-12-06 17:48:36,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065630796] [2021-12-06 17:48:36,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:36,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:48:36,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:48:36,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:48:36,396 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2021-12-06 17:48:36,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:36,411 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-12-06 17:48:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:48:36,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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 14 [2021-12-06 17:48:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:36,412 INFO L225 Difference]: With dead ends: 35 [2021-12-06 17:48:36,412 INFO L226 Difference]: Without dead ends: 24 [2021-12-06 17:48:36,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:48:36,413 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:36,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-06 17:48:36,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-06 17:48:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2021-12-06 17:48:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-06 17:48:36,417 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-12-06 17:48:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:36,417 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-06 17:48:36,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2021-12-06 17:48:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-06 17:48:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 17:48:36,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:36,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:36,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:48:36,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:36,620 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:36,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash 624467328, now seen corresponding path program 1 times [2021-12-06 17:48:36,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:36,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005037292] [2021-12-06 17:48:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:36,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:48:36,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:36,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005037292] [2021-12-06 17:48:36,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005037292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:36,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:36,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:48:36,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249147047] [2021-12-06 17:48:36,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:36,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:48:36,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:36,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:48:36,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:48:36,820 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:36,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:36,838 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-12-06 17:48:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:48:36,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 17:48:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:36,839 INFO L225 Difference]: With dead ends: 33 [2021-12-06 17:48:36,839 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 17:48:36,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:48:36,841 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:36,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 17:48:36,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-12-06 17:48:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-06 17:48:36,846 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2021-12-06 17:48:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:36,846 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-06 17:48:36,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-06 17:48:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 17:48:36,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:36,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:36,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:48:36,848 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:36,848 INFO L85 PathProgramCache]: Analyzing trace with hash 303997821, now seen corresponding path program 1 times [2021-12-06 17:48:36,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:36,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166890494] [2021-12-06 17:48:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:36,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:48:36,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:36,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166890494] [2021-12-06 17:48:36,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166890494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:36,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727710091] [2021-12-06 17:48:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:36,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:36,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:36,920 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:36,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:48:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:36,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:48:36,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:48:37,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:48:37,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727710091] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:37,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:37,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-12-06 17:48:37,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812891600] [2021-12-06 17:48:37,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:37,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:48:37,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:37,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:48:37,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:48:37,071 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 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) [2021-12-06 17:48:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:37,091 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-12-06 17:48:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:48:37,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 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 24 [2021-12-06 17:48:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:37,092 INFO L225 Difference]: With dead ends: 34 [2021-12-06 17:48:37,092 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 17:48:37,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:48:37,094 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:37,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 36 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:37,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 17:48:37,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-06 17:48:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 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) [2021-12-06 17:48:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-06 17:48:37,099 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 24 [2021-12-06 17:48:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:37,100 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-06 17:48:37,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 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) [2021-12-06 17:48:37,100 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-06 17:48:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 17:48:37,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:37,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:37,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:48:37,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 17:48:37,302 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:37,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:37,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2095960992, now seen corresponding path program 2 times [2021-12-06 17:48:37,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:37,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227548170] [2021-12-06 17:48:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:37,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:37,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:37,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227548170] [2021-12-06 17:48:37,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227548170] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:37,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63281449] [2021-12-06 17:48:37,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:48:37,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:37,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:37,893 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:37,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e86dea46-1236-4b38-9484-c5d5ef9d69e4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:48:37,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:48:37,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:37,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 17:48:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:38,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 17:48:38,050 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 17:48:38,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-06 17:48:38,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:48:38,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 17:48:38,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:48:38,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-12-06 17:48:38,237 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-06 17:48:38,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:48:38,314 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 17:48:38,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-12-06 17:48:38,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 17:48:38,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:48:38,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 21 [2021-12-06 17:48:38,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 17:48:38,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:48:38,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:48:38,421 INFO L354 Elim1Store]: treesize reduction 120, result has 13.7 percent of original size [2021-12-06 17:48:38,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 118 treesize of output 84 [2021-12-06 17:48:38,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:48:38,435 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-06 17:48:38,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 74 [2021-12-06 17:48:38,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:48:38,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:48:38,899 INFO L354 Elim1Store]: treesize reduction 256, result has 13.5 percent of original size [2021-12-06 17:48:38,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 222 treesize of output 187 [2021-12-06 17:48:38,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:48:38,967 INFO L354 Elim1Store]: treesize reduction 473, result has 8.5 percent of original size [2021-12-06 17:48:38,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 27 case distinctions, treesize of input 230 treesize of output 147 [2021-12-06 17:48:39,098 INFO L354 Elim1Store]: treesize reduction 176, result has 13.3 percent of original size [2021-12-06 17:48:39,098 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 6 new quantified variables, introduced 8 case distinctions, treesize of input 210 treesize of output 123 [2021-12-06 17:48:39,106 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-06 17:48:39,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 154 treesize of output 122 [2021-12-06 17:48:39,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:48:39,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:48:39,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:48:39,307 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-12-06 17:48:39,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 101 treesize of output 54 [2021-12-06 17:48:39,316 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-12-06 17:48:39,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 24 [2021-12-06 17:48:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:39,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:42,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:48:42,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:48:42,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 2855 treesize of output 2211 [2021-12-06 17:48:42,660 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-12-06 17:48:42,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 2255 treesize of output 1531 [2021-12-06 17:48:44,942 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int)) (v_ArrVal_372 Int)) (let ((.cse27 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (let ((.cse23 (let ((.cse28 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_3))) (store .cse28 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse28 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse27 v_ArrVal_372))))) (let ((.cse25 (select (select .cse23 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse24 (let ((.cse26 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_4))) (store .cse26 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse26 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse27 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (let ((.cse21 (select (select .cse24 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse0 (+ .cse25 4)) (.cse22 (+ .cse25 8))) (or (not (= |c_ULTIMATE.start_dll_create_~head~0#1.base| (select v_arrayElimArr_4 .cse0))) (and (forall ((v_ArrVal_376 Int)) (= (let ((.cse9 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (let ((.cse7 (let ((.cse10 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_3))) (store .cse10 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse9 v_ArrVal_372)))) (.cse3 (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_4))) (store .cse8 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse9 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (let ((.cse5 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (+ (select (select .cse7 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (let ((.cse4 (select (select .cse7 .cse5) .cse6))) (select (let ((.cse2 (select (select .cse3 .cse5) .cse6))) (select (let ((.cse1 (store .cse3 .cse2 (store (select .cse3 .cse2) (+ .cse4 8) v_ArrVal_376)))) (store .cse1 |c_ULTIMATE.start_main_~#s~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset| .cse2))) .cse2)) (+ .cse4 4)))))) 0)) (forall ((v_ArrVal_377 Int)) (= (let ((.cse19 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (let ((.cse13 (let ((.cse20 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_3))) (store .cse20 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse20 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse19 v_ArrVal_372)))) (.cse15 (let ((.cse18 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_4))) (store .cse18 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse18 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse19 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (let ((.cse16 (select (select .cse15 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse17 (+ (select (select .cse13 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (let ((.cse12 (select (select .cse13 .cse16) .cse17))) (select (let ((.cse14 (select (select .cse15 .cse16) .cse17))) (select (let ((.cse11 (store .cse13 .cse14 (store (select .cse13 .cse14) (+ .cse12 8) v_ArrVal_377)))) (store .cse11 |c_ULTIMATE.start_main_~#s~0#1.base| (store (select .cse11 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset| .cse12))) .cse14)) (+ .cse12 4)))))) 0))) (not (= .cse21 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)) (not (= (select v_arrayElimArr_3 .cse0) |c_ULTIMATE.start_dll_create_~head~0#1.offset|)) (not (= (select v_arrayElimArr_3 .cse22) 0)) (and (= (select (select .cse23 .cse21) .cse0) 0) (= (select (select .cse24 .cse21) .cse0) 0)) (not (= (select v_arrayElimArr_4 .cse22) 0)))))))) is different from false [2021-12-06 17:48:53,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:48:53,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:48:53,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 3723 treesize of output 2663 [2021-12-06 17:48:53,662 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-06 17:48:53,662 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 2717 treesize of output 1627 [2021-12-06 17:49:18,348 WARN L227 SmtUtils]: Spent 21.95s on a formula simplification. DAG size of input: 120 DAG size of output: 88 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 17:49:18,349 INFO L354 Elim1Store]: treesize reduction 344, result has 59.4 percent of original size [2021-12-06 17:49:18,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 12545275 treesize of output 9941042 [2021-12-06 17:49:24,713 WARN L227 SmtUtils]: Spent 6.35s on a formula simplification that was a NOOP. DAG size: 4785 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)