./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum04-1.i --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_e1f83ada-666f-47f1-a5b9-9577e44ed587/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/sum04-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/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 a02f2d90df049b7a5c6a05d9dfbf37e8076efe74 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:26:54,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:26:54,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:26:54,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:26:54,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:26:54,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:26:54,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:26:54,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:26:54,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:26:54,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:26:54,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:26:54,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:26:54,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:26:54,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:26:54,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:26:54,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:26:54,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:26:54,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:26:54,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:26:54,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:26:54,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:26:54,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:26:54,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:26:54,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:26:54,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:26:54,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:26:54,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:26:54,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:26:54,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:26:54,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:26:54,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:26:54,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:26:54,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:26:54,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:26:54,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:26:54,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:26:54,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:26:54,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:26:54,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:26:54,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:26:54,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:26:54,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:26:54,939 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:26:54,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:26:54,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:26:54,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:26:54,941 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:26:54,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:26:54,942 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:26:54,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:26:54,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:26:54,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:26:54,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:26:54,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:26:54,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:26:54,944 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:26:54,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:26:54,945 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:26:54,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:26:54,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:26:54,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:26:54,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:26:54,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:26:54,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:26:54,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:26:54,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:26:54,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:26:54,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:26:54,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:26:54,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:26:54,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:26:54,947 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_e1f83ada-666f-47f1-a5b9-9577e44ed587/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a02f2d90df049b7a5c6a05d9dfbf37e8076efe74 [2020-11-30 01:26:55,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:26:55,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:26:55,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:26:55,332 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:26:55,333 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:26:55,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/bin/uautomizer/../../sv-benchmarks/c/loops/sum04-1.i [2020-11-30 01:26:55,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/bin/uautomizer/data/60759daf8/e90ea7b82b0a465ea5ac1faf1c75d259/FLAG92e2dbffe [2020-11-30 01:26:55,932 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:26:55,932 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/sv-benchmarks/c/loops/sum04-1.i [2020-11-30 01:26:55,939 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/bin/uautomizer/data/60759daf8/e90ea7b82b0a465ea5ac1faf1c75d259/FLAG92e2dbffe [2020-11-30 01:26:56,420 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/bin/uautomizer/data/60759daf8/e90ea7b82b0a465ea5ac1faf1c75d259 [2020-11-30 01:26:56,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:26:56,431 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:26:56,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:26:56,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:26:56,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:26:56,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bab8d54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56, skipping insertion in model container [2020-11-30 01:26:56,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:26:56,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:26:56,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:26:56,653 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:26:56,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:26:56,693 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:26:56,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56 WrapperNode [2020-11-30 01:26:56,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:26:56,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:26:56,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:26:56,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:26:56,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:26:56,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:26:56,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:26:56,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:26:56,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:26:56,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:26:56,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:26:56,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:26:56,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/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 [2020-11-30 01:26:56,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:26:56,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:26:56,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:26:56,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:26:57,216 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:26:57,216 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 01:26:57,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:26:57 BoogieIcfgContainer [2020-11-30 01:26:57,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:26:57,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:26:57,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:26:57,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:26:57,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:26:56" (1/3) ... [2020-11-30 01:26:57,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0f2c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:26:57, skipping insertion in model container [2020-11-30 01:26:57,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (2/3) ... [2020-11-30 01:26:57,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0f2c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:26:57, skipping insertion in model container [2020-11-30 01:26:57,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:26:57" (3/3) ... [2020-11-30 01:26:57,241 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-11-30 01:26:57,251 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:26:57,255 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:26:57,267 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:26:57,293 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:26:57,293 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:26:57,293 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:26:57,294 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:26:57,294 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:26:57,294 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:26:57,294 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:26:57,294 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:26:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-30 01:26:57,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:26:57,315 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:57,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:57,318 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:57,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:57,327 INFO L82 PathProgramCache]: Analyzing trace with hash 531641672, now seen corresponding path program 1 times [2020-11-30 01:26:57,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:57,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136081484] [2020-11-30 01:26:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:57,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136081484] [2020-11-30 01:26:57,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:26:57,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:26:57,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200873330] [2020-11-30 01:26:57,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:26:57,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:57,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:26:57,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:26:57,475 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-11-30 01:26:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:57,489 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-11-30 01:26:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:26:57,490 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-30 01:26:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:57,498 INFO L225 Difference]: With dead ends: 24 [2020-11-30 01:26:57,498 INFO L226 Difference]: Without dead ends: 11 [2020-11-30 01:26:57,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:26:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-30 01:26:57,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-30 01:26:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-30 01:26:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-30 01:26:57,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2020-11-30 01:26:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:57,543 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-30 01:26:57,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:26:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-30 01:26:57,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:26:57,555 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:57,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:57,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:26:57,555 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:57,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:57,557 INFO L82 PathProgramCache]: Analyzing trace with hash 216721011, now seen corresponding path program 1 times [2020-11-30 01:26:57,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:57,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334196346] [2020-11-30 01:26:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:57,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334196346] [2020-11-30 01:26:57,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:26:57,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:26:57,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129014131] [2020-11-30 01:26:57,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:26:57,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:57,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:26:57,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:26:57,618 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2020-11-30 01:26:57,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:57,651 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-11-30 01:26:57,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:26:57,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-30 01:26:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:57,652 INFO L225 Difference]: With dead ends: 23 [2020-11-30 01:26:57,652 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 01:26:57,653 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 [2020-11-30 01:26:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 01:26:57,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-11-30 01:26:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-30 01:26:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-30 01:26:57,657 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2020-11-30 01:26:57,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:57,658 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-30 01:26:57,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:26:57,658 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-11-30 01:26:57,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:26:57,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:57,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:57,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:26:57,660 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:57,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1820060357, now seen corresponding path program 1 times [2020-11-30 01:26:57,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:57,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585042180] [2020-11-30 01:26:57,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:57,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585042180] [2020-11-30 01:26:57,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337715431] [2020-11-30 01:26:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/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 [2020-11-30 01:26:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:26:57,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:26:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:57,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:26:57,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-30 01:26:57,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681149976] [2020-11-30 01:26:57,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:26:57,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:57,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:26:57,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:26:57,859 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-11-30 01:26:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:57,906 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-11-30 01:26:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:26:57,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 01:26:57,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:57,908 INFO L225 Difference]: With dead ends: 26 [2020-11-30 01:26:57,908 INFO L226 Difference]: Without dead ends: 17 [2020-11-30 01:26:57,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:26:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-30 01:26:57,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-11-30 01:26:57,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-30 01:26:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-30 01:26:57,913 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-11-30 01:26:57,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:57,913 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-30 01:26:57,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:26:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-30 01:26:57,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:26:57,914 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:57,914 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:58,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 01:26:58,122 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:58,123 INFO L82 PathProgramCache]: Analyzing trace with hash -275836557, now seen corresponding path program 2 times [2020-11-30 01:26:58,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:58,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542828674] [2020-11-30 01:26:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:26:58,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542828674] [2020-11-30 01:26:58,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:26:58,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:26:58,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188550086] [2020-11-30 01:26:58,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:26:58,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:58,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:26:58,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:26:58,217 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-11-30 01:26:58,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:58,259 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-30 01:26:58,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:26:58,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-30 01:26:58,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:58,262 INFO L225 Difference]: With dead ends: 26 [2020-11-30 01:26:58,262 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 01:26:58,263 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 [2020-11-30 01:26:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 01:26:58,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-11-30 01:26:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 01:26:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-30 01:26:58,267 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-11-30 01:26:58,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:58,268 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-30 01:26:58,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:26:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-30 01:26:58,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:26:58,268 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:58,269 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:58,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:26:58,269 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:58,273 INFO L82 PathProgramCache]: Analyzing trace with hash -508664839, now seen corresponding path program 1 times [2020-11-30 01:26:58,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:58,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504692468] [2020-11-30 01:26:58,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:58,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504692468] [2020-11-30 01:26:58,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015502657] [2020-11-30 01:26:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/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 [2020-11-30 01:26:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:58,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:26:58,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:26:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:58,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:26:58,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-30 01:26:58,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506097113] [2020-11-30 01:26:58,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:26:58,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:58,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:26:58,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:26:58,567 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-11-30 01:26:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:58,615 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-11-30 01:26:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:26:58,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-30 01:26:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:58,616 INFO L225 Difference]: With dead ends: 32 [2020-11-30 01:26:58,616 INFO L226 Difference]: Without dead ends: 21 [2020-11-30 01:26:58,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:26:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-30 01:26:58,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-30 01:26:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 01:26:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-30 01:26:58,622 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2020-11-30 01:26:58,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:58,622 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-30 01:26:58,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:26:58,622 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-30 01:26:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 01:26:58,623 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:58,623 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:58,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:26:58,824 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:58,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:58,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1024895439, now seen corresponding path program 2 times [2020-11-30 01:26:58,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:58,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107313134] [2020-11-30 01:26:58,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:58,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107313134] [2020-11-30 01:26:58,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291108797] [2020-11-30 01:26:58,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/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 [2020-11-30 01:26:58,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:26:58,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:26:58,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:26:58,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:26:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:59,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:26:59,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-30 01:26:59,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193839348] [2020-11-30 01:26:59,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:26:59,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:59,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:26:59,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:26:59,022 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-11-30 01:26:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:59,114 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-11-30 01:26:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:26:59,116 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-11-30 01:26:59,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:59,118 INFO L225 Difference]: With dead ends: 32 [2020-11-30 01:26:59,118 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 01:26:59,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:26:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 01:26:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-11-30 01:26:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:26:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-30 01:26:59,124 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2020-11-30 01:26:59,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:59,124 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-30 01:26:59,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:26:59,124 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-30 01:26:59,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 01:26:59,125 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:59,125 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:59,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:26:59,326 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:59,326 INFO L82 PathProgramCache]: Analyzing trace with hash 928251515, now seen corresponding path program 3 times [2020-11-30 01:26:59,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:59,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297421513] [2020-11-30 01:26:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:59,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297421513] [2020-11-30 01:26:59,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253971181] [2020-11-30 01:26:59,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/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 [2020-11-30 01:26:59,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-30 01:26:59,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:26:59,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:26:59,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:26:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 01:26:59,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:26:59,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2020-11-30 01:26:59,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865268655] [2020-11-30 01:26:59,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:26:59,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:59,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:26:59,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:26:59,520 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2020-11-30 01:26:59,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:59,579 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-11-30 01:26:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:26:59,579 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-11-30 01:26:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:59,580 INFO L225 Difference]: With dead ends: 35 [2020-11-30 01:26:59,580 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 01:26:59,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:26:59,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 01:26:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-30 01:26:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:26:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-30 01:26:59,585 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2020-11-30 01:26:59,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:59,586 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-30 01:26:59,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:26:59,586 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-30 01:26:59,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 01:26:59,587 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:59,587 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:59,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:26:59,788 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:59,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:59,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1087768079, now seen corresponding path program 4 times [2020-11-30 01:26:59,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:59,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088586352] [2020-11-30 01:26:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:26:59,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088586352] [2020-11-30 01:26:59,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644690959] [2020-11-30 01:26:59,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/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 [2020-11-30 01:26:59,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:26:59,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:26:59,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:26:59,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:00,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:27:00,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-30 01:27:00,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885438429] [2020-11-30 01:27:00,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:27:00,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:00,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:27:00,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:27:00,033 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 10 states. [2020-11-30 01:27:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:00,109 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-11-30 01:27:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:27:00,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-11-30 01:27:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:00,111 INFO L225 Difference]: With dead ends: 38 [2020-11-30 01:27:00,111 INFO L226 Difference]: Without dead ends: 32 [2020-11-30 01:27:00,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:27:00,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-30 01:27:00,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-11-30 01:27:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 01:27:00,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-11-30 01:27:00,116 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 26 [2020-11-30 01:27:00,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:00,117 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-11-30 01:27:00,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:27:00,117 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-11-30 01:27:00,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-30 01:27:00,118 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:00,118 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:00,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:00,330 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:00,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:00,331 INFO L82 PathProgramCache]: Analyzing trace with hash 495174331, now seen corresponding path program 5 times [2020-11-30 01:27:00,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:00,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759754696] [2020-11-30 01:27:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:27:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:27:00,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759754696] [2020-11-30 01:27:00,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464388984] [2020-11-30 01:27:00,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/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 [2020-11-30 01:27:00,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-30 01:27:00,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:27:00,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:27:00,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:27:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 01:27:00,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:27:00,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2020-11-30 01:27:00,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849932842] [2020-11-30 01:27:00,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:27:00,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:27:00,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:27:00,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:27:00,573 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 10 states. [2020-11-30 01:27:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:27:00,659 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-11-30 01:27:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:27:00,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-11-30 01:27:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:27:00,661 INFO L225 Difference]: With dead ends: 39 [2020-11-30 01:27:00,662 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 01:27:00,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:27:00,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 01:27:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-30 01:27:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 01:27:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-11-30 01:27:00,666 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 29 [2020-11-30 01:27:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:27:00,667 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-11-30 01:27:00,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:27:00,667 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-11-30 01:27:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-30 01:27:00,668 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:27:00,668 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:27:00,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:27:00,890 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:27:00,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:27:00,891 INFO L82 PathProgramCache]: Analyzing trace with hash -808399439, now seen corresponding path program 6 times [2020-11-30 01:27:00,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:27:00,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134802295] [2020-11-30 01:27:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:27:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:27:00,902 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:27:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:27:00,914 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:27:00,932 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:27:00,933 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:27:00,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-30 01:27:00,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:27:00 BoogieIcfgContainer [2020-11-30 01:27:00,965 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:27:00,965 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:27:00,965 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:27:00,966 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:27:00,966 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:26:57" (3/4) ... [2020-11-30 01:27:00,968 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:27:01,017 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e1f83ada-666f-47f1-a5b9-9577e44ed587/bin/uautomizer/witness.graphml [2020-11-30 01:27:01,017 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:27:01,019 INFO L168 Benchmark]: Toolchain (without parser) took 4586.71 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 55.7 MB in the beginning and 41.2 MB in the end (delta: 14.5 MB). Peak memory consumption was 42.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:27:01,019 INFO L168 Benchmark]: CDTParser took 8.71 ms. Allocated memory is still 90.2 MB. Free memory was 63.0 MB in the beginning and 71.9 MB in the end (delta: -8.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:27:01,020 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.86 ms. Allocated memory is still 90.2 MB. Free memory was 55.4 MB in the beginning and 67.3 MB in the end (delta: -11.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:27:01,021 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.71 ms. Allocated memory is still 90.2 MB. Free memory was 67.3 MB in the beginning and 65.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:27:01,021 INFO L168 Benchmark]: Boogie Preprocessor took 35.54 ms. Allocated memory is still 90.2 MB. Free memory was 65.8 MB in the beginning and 64.8 MB in the end (delta: 957.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:27:01,022 INFO L168 Benchmark]: RCFGBuilder took 433.69 ms. Allocated memory is still 90.2 MB. Free memory was 64.8 MB in the beginning and 54.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:27:01,022 INFO L168 Benchmark]: TraceAbstraction took 3734.57 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 54.0 MB in the beginning and 43.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:27:01,023 INFO L168 Benchmark]: Witness Printer took 51.85 ms. Allocated memory is still 117.4 MB. Free memory was 43.3 MB in the beginning and 41.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:27:01,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 8.71 ms. Allocated memory is still 90.2 MB. Free memory was 63.0 MB in the beginning and 71.9 MB in the end (delta: -8.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 257.86 ms. Allocated memory is still 90.2 MB. Free memory was 55.4 MB in the beginning and 67.3 MB in the end (delta: -11.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.71 ms. Allocated memory is still 90.2 MB. Free memory was 67.3 MB in the beginning and 65.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.54 ms. Allocated memory is still 90.2 MB. Free memory was 65.8 MB in the beginning and 64.8 MB in the end (delta: 957.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 433.69 ms. Allocated memory is still 90.2 MB. Free memory was 64.8 MB in the beginning and 54.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3734.57 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 54.0 MB in the beginning and 43.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. * Witness Printer took 51.85 ms. Allocated memory is still 117.4 MB. Free memory was 43.3 MB in the beginning and 41.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, sn=0; [L24] i=1 [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND FALSE !(i<=8) [L15] COND TRUE !(cond) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum04-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.6s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 82 SDtfs, 73 SDslu, 180 SDs, 0 SdLazy, 175 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 172 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=9, 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, 9 MinimizatonAttempts, 10 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 314 NumberOfCodeBlocks, 309 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 267 ConstructedInterpolants, 0 QuantifiedInterpolants, 12185 SizeOfPredicates, 5 NumberOfNonLiveVariables, 335 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 87/387 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 incorrect! Received shutdown request...