./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.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_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c904d43a56f7d48de83a40717b42c35f909963a3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:06:59,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:06:59,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:06:59,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:06:59,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:06:59,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:06:59,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:06:59,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:06:59,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:06:59,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:06:59,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:06:59,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:06:59,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:06:59,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:06:59,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:06:59,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:06:59,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:06:59,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:06:59,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:06:59,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:06:59,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:06:59,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:06:59,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:06:59,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:06:59,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:06:59,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:06:59,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:06:59,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:06:59,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:06:59,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:06:59,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:06:59,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:06:59,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:06:59,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:06:59,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:06:59,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:06:59,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:06:59,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:06:59,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:06:59,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:06:59,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:06:59,838 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:06:59,874 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:06:59,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:06:59,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:06:59,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:06:59,876 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:06:59,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:06:59,877 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:06:59,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:06:59,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:06:59,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:06:59,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:06:59,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:06:59,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:06:59,879 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:06:59,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:06:59,880 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:06:59,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:06:59,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:06:59,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:06:59,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:06:59,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:06:59,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:06:59,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:06:59,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:06:59,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:06:59,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:06:59,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:06:59,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:06:59,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:06:59,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c904d43a56f7d48de83a40717b42c35f909963a3 [2020-11-28 03:07:00,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:07:00,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:07:00,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:07:00,169 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:07:00,170 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:07:00,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2020-11-28 03:07:00,224 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/data/295a3f4e8/84faa93b7a3d4108a2dd6c3a100ac7a8/FLAG0ad7c3258 [2020-11-28 03:07:00,744 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:07:00,745 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2020-11-28 03:07:00,755 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/data/295a3f4e8/84faa93b7a3d4108a2dd6c3a100ac7a8/FLAG0ad7c3258 [2020-11-28 03:07:01,125 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/data/295a3f4e8/84faa93b7a3d4108a2dd6c3a100ac7a8 [2020-11-28 03:07:01,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:07:01,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:07:01,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:07:01,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:07:01,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:07:01,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:07:01" (1/1) ... [2020-11-28 03:07:01,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bfefeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:01, skipping insertion in model container [2020-11-28 03:07:01,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:07:01" (1/1) ... [2020-11-28 03:07:01,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:07:01,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:07:01,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:07:01,391 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:07:01,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:07:01,425 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:07:01,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:01 WrapperNode [2020-11-28 03:07:01,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:07:01,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:07:01,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:07:01,430 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:07:01,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:01" (1/1) ... [2020-11-28 03:07:01,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:01" (1/1) ... [2020-11-28 03:07:01,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:07:01,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:07:01,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:07:01,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:07:01,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:01" (1/1) ... [2020-11-28 03:07:01,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:01" (1/1) ... [2020-11-28 03:07:01,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:01" (1/1) ... [2020-11-28 03:07:01,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:01" (1/1) ... [2020-11-28 03:07:01,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:01" (1/1) ... [2020-11-28 03:07:01,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:01" (1/1) ... [2020-11-28 03:07:01,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:01" (1/1) ... [2020-11-28 03:07:01,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:07:01,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:07:01,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:07:01,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:07:01,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/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 [2020-11-28 03:07:01,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:07:01,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:07:01,558 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-11-28 03:07:01,559 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-11-28 03:07:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:07:01,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:07:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-28 03:07:01,559 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-28 03:07:01,950 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:07:01,953 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 03:07:01,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:07:01 BoogieIcfgContainer [2020-11-28 03:07:01,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:07:01,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:07:01,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:07:01,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:07:01,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:07:01" (1/3) ... [2020-11-28 03:07:01,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130b79d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:07:01, skipping insertion in model container [2020-11-28 03:07:01,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:01" (2/3) ... [2020-11-28 03:07:01,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130b79d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:07:01, skipping insertion in model container [2020-11-28 03:07:01,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:07:01" (3/3) ... [2020-11-28 03:07:01,964 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2020-11-28 03:07:01,975 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:07:01,979 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:07:01,989 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:07:02,022 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:07:02,022 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:07:02,022 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:07:02,022 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:07:02,023 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:07:02,023 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:07:02,023 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:07:02,023 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:07:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-11-28 03:07:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:07:02,048 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:07:02,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:07:02,049 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:07:02,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:07:02,055 INFO L82 PathProgramCache]: Analyzing trace with hash 809990150, now seen corresponding path program 1 times [2020-11-28 03:07:02,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:07:02,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694734905] [2020-11-28 03:07:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:07:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:02,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:07:02,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694734905] [2020-11-28 03:07:02,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:07:02,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:07:02,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898972355] [2020-11-28 03:07:02,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:07:02,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:07:02,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:07:02,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:07:02,286 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-11-28 03:07:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:07:02,367 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-11-28 03:07:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:07:02,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-28 03:07:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:07:02,378 INFO L225 Difference]: With dead ends: 32 [2020-11-28 03:07:02,378 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 03:07:02,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:07:02,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 03:07:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-28 03:07:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 03:07:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-28 03:07:02,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2020-11-28 03:07:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:07:02,424 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-28 03:07:02,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:07:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-28 03:07:02,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:07:02,426 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:07:02,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:07:02,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:07:02,426 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:07:02,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:07:02,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1198290194, now seen corresponding path program 1 times [2020-11-28 03:07:02,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:07:02,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733013663] [2020-11-28 03:07:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:07:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:02,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:02,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:07:02,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733013663] [2020-11-28 03:07:02,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:07:02,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-28 03:07:02,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070404587] [2020-11-28 03:07:02,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:07:02,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:07:02,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:07:02,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:07:02,556 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2020-11-28 03:07:02,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:07:02,647 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-11-28 03:07:02,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:07:02,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-11-28 03:07:02,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:07:02,649 INFO L225 Difference]: With dead ends: 30 [2020-11-28 03:07:02,649 INFO L226 Difference]: Without dead ends: 26 [2020-11-28 03:07:02,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:07:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-28 03:07:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-11-28 03:07:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 03:07:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-28 03:07:02,655 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-11-28 03:07:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:07:02,656 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-28 03:07:02,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:07:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-28 03:07:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:07:02,657 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:07:02,657 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:07:02,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:07:02,658 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:07:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:07:02,658 INFO L82 PathProgramCache]: Analyzing trace with hash 602004046, now seen corresponding path program 1 times [2020-11-28 03:07:02,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:07:02,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278485110] [2020-11-28 03:07:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:07:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:02,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:02,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:02,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:07:02,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278485110] [2020-11-28 03:07:02,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651976272] [2020-11-28 03:07:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/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 [2020-11-28 03:07:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:02,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:07:02,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:07:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:07:03,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:07:03,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-11-28 03:07:03,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266320084] [2020-11-28 03:07:03,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:07:03,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:07:03,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:07:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:07:03,040 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 11 states. [2020-11-28 03:07:03,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:07:03,170 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-11-28 03:07:03,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:07:03,171 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-11-28 03:07:03,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:07:03,172 INFO L225 Difference]: With dead ends: 36 [2020-11-28 03:07:03,172 INFO L226 Difference]: Without dead ends: 32 [2020-11-28 03:07:03,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:07:03,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-28 03:07:03,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-11-28 03:07:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 03:07:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-11-28 03:07:03,179 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-11-28 03:07:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:07:03,179 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-11-28 03:07:03,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:07:03,182 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-11-28 03:07:03,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:07:03,183 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:07:03,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:07:03,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 03:07:03,384 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:07:03,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:07:03,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1171563466, now seen corresponding path program 1 times [2020-11-28 03:07:03,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:07:03,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668024457] [2020-11-28 03:07:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:07:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:03,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:03,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:03,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:03,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:07:03,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668024457] [2020-11-28 03:07:03,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078697783] [2020-11-28 03:07:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/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 [2020-11-28 03:07:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:03,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:07:03,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:07:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:07:03,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:07:03,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-11-28 03:07:03,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617039977] [2020-11-28 03:07:03,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:07:03,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:07:03,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:07:03,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:07:03,774 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 12 states. [2020-11-28 03:07:03,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:07:03,923 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-11-28 03:07:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:07:03,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-11-28 03:07:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:07:03,926 INFO L225 Difference]: With dead ends: 42 [2020-11-28 03:07:03,926 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 03:07:03,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:07:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 03:07:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-11-28 03:07:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-28 03:07:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-28 03:07:03,933 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-11-28 03:07:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:07:03,933 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-28 03:07:03,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:07:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-28 03:07:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-28 03:07:03,935 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:07:03,935 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:07:04,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:07:04,152 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:07:04,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:07:04,152 INFO L82 PathProgramCache]: Analyzing trace with hash -232513386, now seen corresponding path program 2 times [2020-11-28 03:07:04,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:07:04,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657018251] [2020-11-28 03:07:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:07:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:04,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:04,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:04,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:04,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:04,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-28 03:07:04,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657018251] [2020-11-28 03:07:04,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387762768] [2020-11-28 03:07:04,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/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 [2020-11-28 03:07:04,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:07:04,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:07:04,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:07:04,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:07:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-28 03:07:04,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:07:04,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-11-28 03:07:04,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988689752] [2020-11-28 03:07:04,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:07:04,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:07:04,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:07:04,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:07:04,543 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2020-11-28 03:07:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:07:04,690 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-11-28 03:07:04,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:07:04,692 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-11-28 03:07:04,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:07:04,693 INFO L225 Difference]: With dead ends: 48 [2020-11-28 03:07:04,693 INFO L226 Difference]: Without dead ends: 44 [2020-11-28 03:07:04,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:07:04,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-28 03:07:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2020-11-28 03:07:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 03:07:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-28 03:07:04,709 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 34 [2020-11-28 03:07:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:07:04,710 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-28 03:07:04,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:07:04,710 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-28 03:07:04,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-28 03:07:04,712 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:07:04,713 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:07:04,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:07:04,921 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:07:04,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:07:04,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1788325506, now seen corresponding path program 2 times [2020-11-28 03:07:04,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:07:04,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581673672] [2020-11-28 03:07:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:07:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:04,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:05,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:05,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:05,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:05,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:05,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-28 03:07:05,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581673672] [2020-11-28 03:07:05,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517004547] [2020-11-28 03:07:05,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:07:05,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:07:05,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:07:05,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-28 03:07:05,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:07:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-28 03:07:05,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:07:05,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-11-28 03:07:05,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74059566] [2020-11-28 03:07:05,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-28 03:07:05,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:07:05,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:07:05,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:07:05,511 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2020-11-28 03:07:05,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:07:05,611 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-11-28 03:07:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:07:05,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-11-28 03:07:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:07:05,613 INFO L225 Difference]: With dead ends: 54 [2020-11-28 03:07:05,613 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 03:07:05,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:07:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 03:07:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-11-28 03:07:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-28 03:07:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-11-28 03:07:05,631 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2020-11-28 03:07:05,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:07:05,632 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-11-28 03:07:05,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-28 03:07:05,632 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-11-28 03:07:05,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-28 03:07:05,636 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:07:05,636 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:07:05,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:07:05,839 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:07:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:07:05,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1387509026, now seen corresponding path program 3 times [2020-11-28 03:07:05,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:07:05,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184751747] [2020-11-28 03:07:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:07:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:05,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:05,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:05,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-28 03:07:06,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184751747] [2020-11-28 03:07:06,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085868676] [2020-11-28 03:07:06,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:07:06,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-28 03:07:06,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:07:06,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 03:07:06,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:07:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-28 03:07:06,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:07:06,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 15 [2020-11-28 03:07:06,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810002443] [2020-11-28 03:07:06,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:07:06,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:07:06,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:07:06,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:07:06,280 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2020-11-28 03:07:06,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:07:06,479 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-11-28 03:07:06,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:07:06,479 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-11-28 03:07:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:07:06,480 INFO L225 Difference]: With dead ends: 60 [2020-11-28 03:07:06,481 INFO L226 Difference]: Without dead ends: 36 [2020-11-28 03:07:06,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-11-28 03:07:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-28 03:07:06,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-28 03:07:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-28 03:07:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-28 03:07:06,488 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 46 [2020-11-28 03:07:06,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:07:06,488 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-28 03:07:06,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:07:06,488 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-28 03:07:06,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-28 03:07:06,489 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:07:06,490 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:07:06,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-28 03:07:06,700 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:07:06,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:07:06,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1255697094, now seen corresponding path program 3 times [2020-11-28 03:07:06,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:07:06,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453154669] [2020-11-28 03:07:06,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:07:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:07:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:07:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-11-28 03:07:06,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453154669] [2020-11-28 03:07:06,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720930967] [2020-11-28 03:07:06,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:07:07,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-28 03:07:07,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:07:07,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 03:07:07,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:07:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-11-28 03:07:07,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:07:07,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 16 [2020-11-28 03:07:07,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130751661] [2020-11-28 03:07:07,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:07:07,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:07:07,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:07:07,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:07:07,190 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-11-28 03:07:07,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:07:07,433 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-11-28 03:07:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:07:07,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-11-28 03:07:07,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:07:07,434 INFO L225 Difference]: With dead ends: 36 [2020-11-28 03:07:07,434 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:07:07,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-11-28 03:07:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:07:07,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:07:07,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:07:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:07:07,439 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2020-11-28 03:07:07,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:07:07,440 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:07:07,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:07:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:07:07,440 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:07:07,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:07:07,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 03:07:07,691 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= id2_~x |id2_#in~x|) [2020-11-28 03:07:07,691 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-28 03:07:07,691 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-11-28 03:07:07,691 INFO L274 CegarLoopResult]: For program point id2EXIT(lines 14 17) no Hoare annotation was computed. [2020-11-28 03:07:07,691 INFO L277 CegarLoopResult]: At program point id2ENTRY(lines 14 17) the Hoare annotation is: true [2020-11-28 03:07:07,691 INFO L274 CegarLoopResult]: For program point id2FINAL(lines 14 17) no Hoare annotation was computed. [2020-11-28 03:07:07,691 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 03:07:07,691 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 03:07:07,691 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 03:07:07,692 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 03:07:07,692 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-28 03:07:07,692 INFO L274 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-11-28 03:07:07,692 INFO L274 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-11-28 03:07:07,692 INFO L270 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 5)) [2020-11-28 03:07:07,692 INFO L274 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-11-28 03:07:07,692 INFO L274 CegarLoopResult]: For program point L19(lines 19 25) no Hoare annotation was computed. [2020-11-28 03:07:07,692 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-28 03:07:07,692 INFO L274 CegarLoopResult]: For program point idFINAL(lines 9 12) no Hoare annotation was computed. [2020-11-28 03:07:07,692 INFO L270 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-11-28 03:07:07,692 INFO L274 CegarLoopResult]: For program point idEXIT(lines 9 12) no Hoare annotation was computed. [2020-11-28 03:07:07,692 INFO L274 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-11-28 03:07:07,692 INFO L274 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-11-28 03:07:07,693 INFO L277 CegarLoopResult]: At program point idENTRY(lines 9 12) the Hoare annotation is: true [2020-11-28 03:07:07,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:07:07 BoogieIcfgContainer [2020-11-28 03:07:07,696 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:07:07,696 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:07:07,696 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:07:07,697 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:07:07,697 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:07:01" (3/4) ... [2020-11-28 03:07:07,699 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:07:07,703 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2020-11-28 03:07:07,703 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-11-28 03:07:07,708 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-28 03:07:07,708 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:07:07,708 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:07:07,708 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:07:07,757 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b6156f01-e9d1-4593-a99c-faa2b6dbac57/bin/uautomizer/witness.graphml [2020-11-28 03:07:07,758 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:07:07,760 INFO L168 Benchmark]: Toolchain (without parser) took 6628.52 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 73.5 MB in the beginning and 98.7 MB in the end (delta: -25.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:07:07,763 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 77.6 MB. Free memory is still 36.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:07:07,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.08 ms. Allocated memory is still 104.9 MB. Free memory was 73.3 MB in the beginning and 81.7 MB in the end (delta: -8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:07:07,764 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.64 ms. Allocated memory is still 104.9 MB. Free memory was 81.2 MB in the beginning and 80.2 MB in the end (delta: 989.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:07:07,765 INFO L168 Benchmark]: Boogie Preprocessor took 17.39 ms. Allocated memory is still 104.9 MB. Free memory was 80.2 MB in the beginning and 79.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:07:07,765 INFO L168 Benchmark]: RCFGBuilder took 472.20 ms. Allocated memory is still 104.9 MB. Free memory was 79.1 MB in the beginning and 67.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:07:07,766 INFO L168 Benchmark]: TraceAbstraction took 5738.80 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 67.1 MB in the beginning and 100.8 MB in the end (delta: -33.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:07:07,766 INFO L168 Benchmark]: Witness Printer took 62.67 ms. Allocated memory is still 151.0 MB. Free memory was 100.8 MB in the beginning and 98.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:07:07,768 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 77.6 MB. Free memory is still 36.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.08 ms. Allocated memory is still 104.9 MB. Free memory was 73.3 MB in the beginning and 81.7 MB in the end (delta: -8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.64 ms. Allocated memory is still 104.9 MB. Free memory was 81.2 MB in the beginning and 80.2 MB in the end (delta: 989.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.39 ms. Allocated memory is still 104.9 MB. Free memory was 80.2 MB in the beginning and 79.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 472.20 ms. Allocated memory is still 104.9 MB. Free memory was 79.1 MB in the beginning and 67.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5738.80 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 67.1 MB in the beginning and 100.8 MB in the end (delta: -33.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. * Witness Printer took 62.67 ms. Allocated memory is still 151.0 MB. Free memory was 100.8 MB in the beginning and 98.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.6s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 154 SDtfs, 109 SDslu, 959 SDs, 0 SdLazy, 538 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 384 GetRequests, 273 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 15 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 470 NumberOfCodeBlocks, 470 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 456 ConstructedInterpolants, 0 QuantifiedInterpolants, 46512 SizeOfPredicates, 33 NumberOfNonLiveVariables, 690 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 282/360 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...