./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label36.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label36.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3efef18ca2c5424ea24622c4ce9c5dae3a170caf ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:07:16,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:07:16,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:07:16,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:07:16,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:07:16,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:07:16,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:07:16,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:07:16,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:07:16,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:07:16,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:07:16,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:07:16,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:07:16,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:07:16,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:07:16,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:07:16,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:07:16,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:07:16,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:07:16,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:07:16,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:07:16,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:07:16,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:07:16,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:07:16,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:07:16,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:07:16,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:07:16,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:07:16,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:07:16,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:07:16,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:07:16,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:07:16,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:07:16,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:07:16,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:07:16,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:07:16,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:07:16,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:07:16,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:07:16,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:07:16,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:07:16,359 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:07:16,404 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:07:16,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:07:16,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:07:16,406 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:07:16,406 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:07:16,406 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:07:16,406 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:07:16,407 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:07:16,407 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:07:16,407 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:07:16,408 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:07:16,408 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:07:16,409 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:07:16,409 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:07:16,409 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:07:16,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:07:16,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:07:16,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:07:16,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:07:16,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:07:16,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:07:16,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:07:16,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:07:16,412 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:07:16,412 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:07:16,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:07:16,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:07:16,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:07:16,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:07:16,415 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:07:16,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:07:16,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:07:16,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:07:16,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:07:16,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:07:16,416 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:07:16,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:07:16,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:07:16,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:07:16,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:07:16,417 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3efef18ca2c5424ea24622c4ce9c5dae3a170caf [2020-11-22 13:07:16,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:07:16,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:07:16,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:07:16,670 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:07:16,670 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:07:16,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label36.c [2020-11-22 13:07:16,736 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/data/b46245275/7f1df465fa45431d85bc4a821b85a9bf/FLAG2ca833289 [2020-11-22 13:07:17,328 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:07:17,330 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/sv-benchmarks/c/eca-rers2012/Problem01_label36.c [2020-11-22 13:07:17,351 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/data/b46245275/7f1df465fa45431d85bc4a821b85a9bf/FLAG2ca833289 [2020-11-22 13:07:17,559 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/data/b46245275/7f1df465fa45431d85bc4a821b85a9bf [2020-11-22 13:07:17,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:07:17,565 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:07:17,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:07:17,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:07:17,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:07:17,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:07:17" (1/1) ... [2020-11-22 13:07:17,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a2c89be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:17, skipping insertion in model container [2020-11-22 13:07:17,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:07:17" (1/1) ... [2020-11-22 13:07:17,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:07:17,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:07:18,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:07:18,125 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:07:18,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:07:18,282 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:07:18,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:18 WrapperNode [2020-11-22 13:07:18,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:07:18,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:07:18,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:07:18,284 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:07:18,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:18" (1/1) ... [2020-11-22 13:07:18,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:18" (1/1) ... [2020-11-22 13:07:18,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:07:18,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:07:18,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:07:18,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:07:18,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:18" (1/1) ... [2020-11-22 13:07:18,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:18" (1/1) ... [2020-11-22 13:07:18,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:18" (1/1) ... [2020-11-22 13:07:18,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:18" (1/1) ... [2020-11-22 13:07:18,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:18" (1/1) ... [2020-11-22 13:07:18,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:18" (1/1) ... [2020-11-22 13:07:18,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:18" (1/1) ... [2020-11-22 13:07:18,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:07:18,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:07:18,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:07:18,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:07:18,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:07:18,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:07:18,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:07:18,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:07:18,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:07:20,680 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:07:20,680 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-22 13:07:20,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:07:20 BoogieIcfgContainer [2020-11-22 13:07:20,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:07:20,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:07:20,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:07:20,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:07:20,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:07:17" (1/3) ... [2020-11-22 13:07:20,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a4662b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:07:20, skipping insertion in model container [2020-11-22 13:07:20,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:18" (2/3) ... [2020-11-22 13:07:20,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a4662b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:07:20, skipping insertion in model container [2020-11-22 13:07:20,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:07:20" (3/3) ... [2020-11-22 13:07:20,690 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label36.c [2020-11-22 13:07:20,700 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:07:20,705 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:07:20,715 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:07:20,748 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:07:20,748 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:07:20,748 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:07:20,748 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:07:20,748 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:07:20,749 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:07:20,749 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:07:20,749 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:07:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-22 13:07:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-22 13:07:20,775 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:20,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:20,776 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:20,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1520707949, now seen corresponding path program 1 times [2020-11-22 13:07:20,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:20,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146434719] [2020-11-22 13:07:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:21,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146434719] [2020-11-22 13:07:21,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:21,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:07:21,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660343390] [2020-11-22 13:07:21,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:07:21,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:21,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:07:21,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:07:21,165 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-22 13:07:21,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:21,695 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-22 13:07:21,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:07:21,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-22 13:07:21,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:21,708 INFO L225 Difference]: With dead ends: 224 [2020-11-22 13:07:21,708 INFO L226 Difference]: Without dead ends: 145 [2020-11-22 13:07:21,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:07:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-22 13:07:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-22 13:07:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-22 13:07:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-22 13:07:21,758 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-22 13:07:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:21,759 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-22 13:07:21,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:07:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-22 13:07:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-22 13:07:21,763 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:21,763 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:21,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:07:21,764 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1975138238, now seen corresponding path program 1 times [2020-11-22 13:07:21,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:21,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752568490] [2020-11-22 13:07:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:21,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752568490] [2020-11-22 13:07:21,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:21,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:07:21,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166934175] [2020-11-22 13:07:21,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:07:21,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:21,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:07:21,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:07:21,821 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-22 13:07:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:22,487 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-11-22 13:07:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:07:22,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-11-22 13:07:22,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:22,491 INFO L225 Difference]: With dead ends: 431 [2020-11-22 13:07:22,491 INFO L226 Difference]: Without dead ends: 287 [2020-11-22 13:07:22,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:07:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-22 13:07:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-22 13:07:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-22 13:07:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2020-11-22 13:07:22,517 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2020-11-22 13:07:22,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:22,517 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2020-11-22 13:07:22,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:07:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2020-11-22 13:07:22,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-22 13:07:22,529 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:22,529 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:22,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:07:22,530 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:22,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:22,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1832090820, now seen corresponding path program 1 times [2020-11-22 13:07:22,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:22,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044835176] [2020-11-22 13:07:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:22,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044835176] [2020-11-22 13:07:22,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:22,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:07:22,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378603540] [2020-11-22 13:07:22,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:22,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:22,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:22,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:22,800 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 4 states. [2020-11-22 13:07:23,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:23,383 INFO L93 Difference]: Finished difference Result 784 states and 1255 transitions. [2020-11-22 13:07:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:07:23,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-11-22 13:07:23,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:23,387 INFO L225 Difference]: With dead ends: 784 [2020-11-22 13:07:23,387 INFO L226 Difference]: Without dead ends: 429 [2020-11-22 13:07:23,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:23,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-11-22 13:07:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2020-11-22 13:07:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-11-22 13:07:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 557 transitions. [2020-11-22 13:07:23,415 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 557 transitions. Word has length 78 [2020-11-22 13:07:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:23,415 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 557 transitions. [2020-11-22 13:07:23,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 557 transitions. [2020-11-22 13:07:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-22 13:07:23,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:23,417 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:23,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:07:23,418 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:23,419 INFO L82 PathProgramCache]: Analyzing trace with hash 102967575, now seen corresponding path program 1 times [2020-11-22 13:07:23,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:23,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213686404] [2020-11-22 13:07:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:23,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213686404] [2020-11-22 13:07:23,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:23,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:07:23,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525516752] [2020-11-22 13:07:23,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:23,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:23,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:23,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:23,476 INFO L87 Difference]: Start difference. First operand 429 states and 557 transitions. Second operand 4 states. [2020-11-22 13:07:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:23,935 INFO L93 Difference]: Finished difference Result 999 states and 1360 transitions. [2020-11-22 13:07:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:07:23,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-11-22 13:07:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:23,939 INFO L225 Difference]: With dead ends: 999 [2020-11-22 13:07:23,939 INFO L226 Difference]: Without dead ends: 642 [2020-11-22 13:07:23,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2020-11-22 13:07:23,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2020-11-22 13:07:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-11-22 13:07:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 851 transitions. [2020-11-22 13:07:23,969 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 851 transitions. Word has length 83 [2020-11-22 13:07:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:23,969 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 851 transitions. [2020-11-22 13:07:23,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:23,970 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 851 transitions. [2020-11-22 13:07:23,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-22 13:07:23,971 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:23,972 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:23,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:07:23,972 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:23,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1752400941, now seen corresponding path program 1 times [2020-11-22 13:07:23,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:23,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14618788] [2020-11-22 13:07:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-22 13:07:24,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14618788] [2020-11-22 13:07:24,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:24,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:07:24,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066611964] [2020-11-22 13:07:24,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:07:24,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:24,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:07:24,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:07:24,017 INFO L87 Difference]: Start difference. First operand 642 states and 851 transitions. Second operand 3 states. [2020-11-22 13:07:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:24,338 INFO L93 Difference]: Finished difference Result 1567 states and 2073 transitions. [2020-11-22 13:07:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:07:24,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-11-22 13:07:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:24,346 INFO L225 Difference]: With dead ends: 1567 [2020-11-22 13:07:24,346 INFO L226 Difference]: Without dead ends: 997 [2020-11-22 13:07:24,348 INFO L677 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 [2020-11-22 13:07:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-22 13:07:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 784. [2020-11-22 13:07:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-22 13:07:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1029 transitions. [2020-11-22 13:07:24,392 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1029 transitions. Word has length 92 [2020-11-22 13:07:24,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:24,392 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1029 transitions. [2020-11-22 13:07:24,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:07:24,392 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1029 transitions. [2020-11-22 13:07:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-22 13:07:24,410 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:24,410 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:24,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:07:24,411 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:24,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:24,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1072327650, now seen corresponding path program 1 times [2020-11-22 13:07:24,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:24,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60596427] [2020-11-22 13:07:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:24,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60596427] [2020-11-22 13:07:24,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:24,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:07:24,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568414899] [2020-11-22 13:07:24,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:24,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:24,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:24,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:24,535 INFO L87 Difference]: Start difference. First operand 784 states and 1029 transitions. Second operand 4 states. [2020-11-22 13:07:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:25,008 INFO L93 Difference]: Finished difference Result 1709 states and 2302 transitions. [2020-11-22 13:07:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:07:25,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-11-22 13:07:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:25,014 INFO L225 Difference]: With dead ends: 1709 [2020-11-22 13:07:25,014 INFO L226 Difference]: Without dead ends: 997 [2020-11-22 13:07:25,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:25,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-22 13:07:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 926. [2020-11-22 13:07:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-22 13:07:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1202 transitions. [2020-11-22 13:07:25,043 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1202 transitions. Word has length 98 [2020-11-22 13:07:25,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:25,044 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1202 transitions. [2020-11-22 13:07:25,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1202 transitions. [2020-11-22 13:07:25,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-22 13:07:25,051 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:25,051 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:25,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:07:25,052 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:25,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:25,061 INFO L82 PathProgramCache]: Analyzing trace with hash 414560251, now seen corresponding path program 1 times [2020-11-22 13:07:25,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:25,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912664093] [2020-11-22 13:07:25,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-22 13:07:25,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912664093] [2020-11-22 13:07:25,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:25,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:07:25,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047548316] [2020-11-22 13:07:25,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:25,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:25,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:25,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:25,228 INFO L87 Difference]: Start difference. First operand 926 states and 1202 transitions. Second operand 4 states. [2020-11-22 13:07:25,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:25,703 INFO L93 Difference]: Finished difference Result 1993 states and 2589 transitions. [2020-11-22 13:07:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:07:25,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-11-22 13:07:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:25,709 INFO L225 Difference]: With dead ends: 1993 [2020-11-22 13:07:25,710 INFO L226 Difference]: Without dead ends: 1139 [2020-11-22 13:07:25,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:25,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-22 13:07:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1068. [2020-11-22 13:07:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-22 13:07:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1363 transitions. [2020-11-22 13:07:25,746 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1363 transitions. Word has length 112 [2020-11-22 13:07:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:25,746 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1363 transitions. [2020-11-22 13:07:25,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1363 transitions. [2020-11-22 13:07:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-11-22 13:07:25,750 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:25,750 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:25,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:07:25,750 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:25,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1154617736, now seen corresponding path program 1 times [2020-11-22 13:07:25,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:25,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822101780] [2020-11-22 13:07:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:25,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822101780] [2020-11-22 13:07:25,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:25,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:07:25,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340040885] [2020-11-22 13:07:25,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:25,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:25,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:25,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:25,908 INFO L87 Difference]: Start difference. First operand 1068 states and 1363 transitions. Second operand 4 states. [2020-11-22 13:07:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:26,488 INFO L93 Difference]: Finished difference Result 2277 states and 2909 transitions. [2020-11-22 13:07:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:07:26,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-11-22 13:07:26,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:26,496 INFO L225 Difference]: With dead ends: 2277 [2020-11-22 13:07:26,496 INFO L226 Difference]: Without dead ends: 1281 [2020-11-22 13:07:26,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:26,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-22 13:07:26,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 997. [2020-11-22 13:07:26,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-22 13:07:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1203 transitions. [2020-11-22 13:07:26,525 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1203 transitions. Word has length 129 [2020-11-22 13:07:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:26,526 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1203 transitions. [2020-11-22 13:07:26,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1203 transitions. [2020-11-22 13:07:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-11-22 13:07:26,529 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:26,530 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:26,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:07:26,531 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:26,532 INFO L82 PathProgramCache]: Analyzing trace with hash -879968992, now seen corresponding path program 1 times [2020-11-22 13:07:26,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:26,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887156223] [2020-11-22 13:07:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-22 13:07:26,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887156223] [2020-11-22 13:07:26,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:26,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:07:26,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307152095] [2020-11-22 13:07:26,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:07:26,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:26,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:07:26,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:07:26,711 INFO L87 Difference]: Start difference. First operand 997 states and 1203 transitions. Second operand 3 states. [2020-11-22 13:07:27,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:27,012 INFO L93 Difference]: Finished difference Result 2135 states and 2589 transitions. [2020-11-22 13:07:27,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:07:27,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2020-11-22 13:07:27,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:27,019 INFO L225 Difference]: With dead ends: 2135 [2020-11-22 13:07:27,019 INFO L226 Difference]: Without dead ends: 1210 [2020-11-22 13:07:27,021 INFO L677 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 [2020-11-22 13:07:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-22 13:07:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1139. [2020-11-22 13:07:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-22 13:07:27,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1359 transitions. [2020-11-22 13:07:27,052 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1359 transitions. Word has length 172 [2020-11-22 13:07:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:27,053 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1359 transitions. [2020-11-22 13:07:27,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:07:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1359 transitions. [2020-11-22 13:07:27,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-22 13:07:27,056 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:27,056 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:27,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 13:07:27,057 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:27,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:27,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1976361367, now seen corresponding path program 1 times [2020-11-22 13:07:27,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:27,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545402386] [2020-11-22 13:07:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 121 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-22 13:07:27,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545402386] [2020-11-22 13:07:27,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167485676] [2020-11-22 13:07:27,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:27,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 13:07:27,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-11-22 13:07:27,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:07:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-11-22 13:07:27,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:07:27,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-11-22 13:07:27,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475990633] [2020-11-22 13:07:27,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:07:27,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:27,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:07:27,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:07:27,832 INFO L87 Difference]: Start difference. First operand 1139 states and 1359 transitions. Second operand 3 states. [2020-11-22 13:07:28,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:28,283 INFO L93 Difference]: Finished difference Result 2561 states and 3082 transitions. [2020-11-22 13:07:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:07:28,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2020-11-22 13:07:28,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:28,291 INFO L225 Difference]: With dead ends: 2561 [2020-11-22 13:07:28,291 INFO L226 Difference]: Without dead ends: 1352 [2020-11-22 13:07:28,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 386 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:07:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-22 13:07:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1281. [2020-11-22 13:07:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-11-22 13:07:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1510 transitions. [2020-11-22 13:07:28,334 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1510 transitions. Word has length 194 [2020-11-22 13:07:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:28,335 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1510 transitions. [2020-11-22 13:07:28,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:07:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1510 transitions. [2020-11-22 13:07:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-11-22 13:07:28,338 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:28,339 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:28,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-22 13:07:28,552 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:28,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:28,552 INFO L82 PathProgramCache]: Analyzing trace with hash 15734310, now seen corresponding path program 1 times [2020-11-22 13:07:28,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:28,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438143359] [2020-11-22 13:07:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 124 proven. 67 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-22 13:07:28,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438143359] [2020-11-22 13:07:28,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638941301] [2020-11-22 13:07:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:28,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 13:07:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-11-22 13:07:28,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:07:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-11-22 13:07:29,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:07:29,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-11-22 13:07:29,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442481226] [2020-11-22 13:07:29,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:07:29,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:29,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:07:29,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:29,053 INFO L87 Difference]: Start difference. First operand 1281 states and 1510 transitions. Second operand 3 states. [2020-11-22 13:07:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:29,373 INFO L93 Difference]: Finished difference Result 2845 states and 3377 transitions. [2020-11-22 13:07:29,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:07:29,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2020-11-22 13:07:29,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:29,382 INFO L225 Difference]: With dead ends: 2845 [2020-11-22 13:07:29,382 INFO L226 Difference]: Without dead ends: 1565 [2020-11-22 13:07:29,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 393 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:07:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2020-11-22 13:07:29,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1423. [2020-11-22 13:07:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1423 states. [2020-11-22 13:07:29,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 1670 transitions. [2020-11-22 13:07:29,421 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 1670 transitions. Word has length 197 [2020-11-22 13:07:29,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:29,422 INFO L481 AbstractCegarLoop]: Abstraction has 1423 states and 1670 transitions. [2020-11-22 13:07:29,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:07:29,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 1670 transitions. [2020-11-22 13:07:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-11-22 13:07:29,428 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:29,428 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:29,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:29,652 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:29,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:29,652 INFO L82 PathProgramCache]: Analyzing trace with hash 413833490, now seen corresponding path program 1 times [2020-11-22 13:07:29,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:29,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328378124] [2020-11-22 13:07:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 143 proven. 86 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-11-22 13:07:29,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328378124] [2020-11-22 13:07:29,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188820353] [2020-11-22 13:07:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:07:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:30,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 13:07:30,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-22 13:07:30,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:07:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-11-22 13:07:30,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:07:30,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-11-22 13:07:30,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92639515] [2020-11-22 13:07:30,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:07:30,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:30,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:07:30,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:07:30,336 INFO L87 Difference]: Start difference. First operand 1423 states and 1670 transitions. Second operand 3 states. [2020-11-22 13:07:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:30,665 INFO L93 Difference]: Finished difference Result 2772 states and 3209 transitions. [2020-11-22 13:07:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:07:30,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-11-22 13:07:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:30,666 INFO L225 Difference]: With dead ends: 2772 [2020-11-22 13:07:30,666 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:07:30,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 430 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:07:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:07:30,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:07:30,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:07:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:07:30,669 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 216 [2020-11-22 13:07:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:30,669 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:07:30,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:07:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:07:30,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:07:30,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-22 13:07:30,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:07:31,327 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-11-22 13:07:31,660 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-11-22 13:07:31,666 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-22 13:07:31,666 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-22 13:07:31,666 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-22 13:07:31,666 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-22 13:07:31,666 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-22 13:07:31,666 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-22 13:07:31,666 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-22 13:07:31,666 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-22 13:07:31,666 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-22 13:07:31,667 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-22 13:07:31,668 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:07:31,669 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-22 13:07:31,669 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-22 13:07:31,669 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-22 13:07:31,669 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (<= 14 ~a8~0)) (.cse2 (= ~a21~0 1)) (.cse4 (= ~a12~0 8)) (.cse8 (<= ~a16~0 5)) (.cse6 (= ~a17~0 1)) (.cse3 (= ~a16~0 6)) (.cse5 (not (= ~a7~0 1))) (.cse7 (<= ~a16~0 4)) (.cse1 (= ~a20~0 1)) (.cse9 (<= ~a21~0 0))) (or (and .cse0 .cse1) (and .cse2 .cse3 .cse4 .cse1 .cse5 .cse6) (and .cse7 .cse5) (and .cse0 .cse8) (and .cse2 .cse4 (= ~a8~0 13) .cse1 (= ~a16~0 4) .cse6) (and .cse7 .cse9 .cse6) (and .cse8 .cse9 .cse1 .cse6) (and .cse3 .cse1 .cse9) (and .cse3 .cse5 (<= 15 ~a8~0)) (and .cse7 .cse1 .cse9))) [2020-11-22 13:07:31,669 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-22 13:07:31,669 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-22 13:07:31,669 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-22 13:07:31,669 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-22 13:07:31,669 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-22 13:07:31,670 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-22 13:07:31,670 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-22 13:07:31,670 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:07:31,670 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-22 13:07:31,670 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-22 13:07:31,670 INFO L274 CegarLoopResult]: For program point L488-1(lines 40 585) no Hoare annotation was computed. [2020-11-22 13:07:31,670 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-22 13:07:31,670 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-22 13:07:31,670 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-22 13:07:31,670 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-22 13:07:31,670 INFO L274 CegarLoopResult]: For program point L491-1(lines 40 585) no Hoare annotation was computed. [2020-11-22 13:07:31,670 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-22 13:07:31,670 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-22 13:07:31,670 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-22 13:07:31,671 INFO L274 CegarLoopResult]: For program point L492(line 492) no Hoare annotation was computed. [2020-11-22 13:07:31,671 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-22 13:07:31,671 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-22 13:07:31,671 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-22 13:07:31,671 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-22 13:07:31,671 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-22 13:07:31,671 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-22 13:07:31,671 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (<= 14 ~a8~0)) (.cse2 (= ~a21~0 1)) (.cse4 (= ~a12~0 8)) (.cse8 (<= ~a16~0 5)) (.cse6 (= ~a17~0 1)) (.cse3 (= ~a16~0 6)) (.cse5 (not (= ~a7~0 1))) (.cse7 (<= ~a16~0 4)) (.cse1 (= ~a20~0 1)) (.cse9 (<= ~a21~0 0))) (or (and .cse0 .cse1) (and .cse2 .cse3 .cse4 .cse1 .cse5 .cse6) (and .cse7 .cse5) (and .cse0 .cse8) (and .cse2 .cse4 (= ~a8~0 13) .cse1 (= ~a16~0 4) .cse6) (and .cse7 .cse9 .cse6) (and .cse8 .cse9 .cse1 .cse6) (and .cse3 .cse1 .cse9) (and .cse3 .cse5 (<= 15 ~a8~0)) (and .cse7 .cse1 .cse9))) [2020-11-22 13:07:31,676 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-22 13:07:31,676 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-22 13:07:31,676 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-22 13:07:31,676 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-22 13:07:31,676 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-22 13:07:31,676 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-22 13:07:31,676 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-22 13:07:31,676 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-22 13:07:31,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:07:31 BoogieIcfgContainer [2020-11-22 13:07:31,717 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:07:31,718 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:07:31,718 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:07:31,718 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:07:31,719 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:07:20" (3/4) ... [2020-11-22 13:07:31,721 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:07:31,747 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-11-22 13:07:31,749 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-22 13:07:31,750 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-22 13:07:31,752 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-22 13:07:31,909 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b7d4fefd-cbca-4370-9a44-2bcd3a9ea4af/bin/utaipan/witness.graphml [2020-11-22 13:07:31,909 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:07:31,910 INFO L168 Benchmark]: Toolchain (without parser) took 14345.07 ms. Allocated memory was 121.6 MB in the beginning and 331.4 MB in the end (delta: 209.7 MB). Free memory was 90.2 MB in the beginning and 187.5 MB in the end (delta: -97.3 MB). Peak memory consumption was 112.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:31,911 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 86.0 MB. Free memory is still 43.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:07:31,911 INFO L168 Benchmark]: CACSL2BoogieTranslator took 714.17 ms. Allocated memory is still 121.6 MB. Free memory was 89.9 MB in the beginning and 81.8 MB in the end (delta: 8.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:31,912 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.08 ms. Allocated memory is still 121.6 MB. Free memory was 81.8 MB in the beginning and 76.2 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:31,912 INFO L168 Benchmark]: Boogie Preprocessor took 70.66 ms. Allocated memory is still 121.6 MB. Free memory was 76.2 MB in the beginning and 72.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:31,913 INFO L168 Benchmark]: RCFGBuilder took 2220.12 ms. Allocated memory was 121.6 MB in the beginning and 174.1 MB in the end (delta: 52.4 MB). Free memory was 72.0 MB in the beginning and 137.9 MB in the end (delta: -65.9 MB). Peak memory consumption was 62.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:31,913 INFO L168 Benchmark]: TraceAbstraction took 11033.40 ms. Allocated memory was 174.1 MB in the beginning and 331.4 MB in the end (delta: 157.3 MB). Free memory was 137.9 MB in the beginning and 202.3 MB in the end (delta: -64.4 MB). Peak memory consumption was 189.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:31,913 INFO L168 Benchmark]: Witness Printer took 191.42 ms. Allocated memory is still 331.4 MB. Free memory was 202.3 MB in the beginning and 187.5 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:31,915 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 86.0 MB. Free memory is still 43.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 714.17 ms. Allocated memory is still 121.6 MB. Free memory was 89.9 MB in the beginning and 81.8 MB in the end (delta: 8.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 107.08 ms. Allocated memory is still 121.6 MB. Free memory was 81.8 MB in the beginning and 76.2 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.66 ms. Allocated memory is still 121.6 MB. Free memory was 76.2 MB in the beginning and 72.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2220.12 ms. Allocated memory was 121.6 MB in the beginning and 174.1 MB in the end (delta: 52.4 MB). Free memory was 72.0 MB in the beginning and 137.9 MB in the end (delta: -65.9 MB). Peak memory consumption was 62.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11033.40 ms. Allocated memory was 174.1 MB in the beginning and 331.4 MB in the end (delta: 157.3 MB). Free memory was 137.9 MB in the beginning and 202.3 MB in the end (delta: -64.4 MB). Peak memory consumption was 189.3 MB. Max. memory is 16.1 GB. * Witness Printer took 191.42 ms. Allocated memory is still 331.4 MB. Free memory was 202.3 MB in the beginning and 187.5 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((((14 <= a8 && a20 == 1) || (((((a21 == 1 && a16 == 6) && a12 == 8) && a20 == 1) && !(a7 == 1)) && a17 == 1)) || (a16 <= 4 && !(a7 == 1))) || (14 <= a8 && a16 <= 5)) || (((((a21 == 1 && a12 == 8) && a8 == 13) && a20 == 1) && a16 == 4) && a17 == 1)) || ((a16 <= 4 && a21 <= 0) && a17 == 1)) || (((a16 <= 5 && a21 <= 0) && a20 == 1) && a17 == 1)) || ((a16 == 6 && a20 == 1) && a21 <= 0)) || ((a16 == 6 && !(a7 == 1)) && 15 <= a8)) || ((a16 <= 4 && a20 == 1) && a21 <= 0) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((((14 <= a8 && a20 == 1) || (((((a21 == 1 && a16 == 6) && a12 == 8) && a20 == 1) && !(a7 == 1)) && a17 == 1)) || (a16 <= 4 && !(a7 == 1))) || (14 <= a8 && a16 <= 5)) || (((((a21 == 1 && a12 == 8) && a8 == 13) && a20 == 1) && a16 == 4) && a17 == 1)) || ((a16 <= 4 && a21 <= 0) && a17 == 1)) || (((a16 <= 5 && a21 <= 0) && a20 == 1) && a17 == 1)) || ((a16 == 6 && a20 == 1) && a21 <= 0)) || ((a16 == 6 && !(a7 == 1)) && 15 <= a8)) || ((a16 <= 4 && a20 == 1) && a21 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.1s, OverallIterations: 12, TraceHistogramMax: 5, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 598 SDtfs, 1033 SDslu, 59 SDs, 0 SdLazy, 2949 SolverSat, 738 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1250 GetRequests, 1222 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1423occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 923 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 47 NumberOfFragments, 233 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2148 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 434 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 2126 NumberOfCodeBlocks, 2126 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 2715 ConstructedInterpolants, 0 QuantifiedInterpolants, 1697453 SizeOfPredicates, 3 NumberOfNonLiveVariables, 1309 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 18 InterpolantComputations, 15 PerfectInterpolantSequences, 2286/2503 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...