./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01_bug02.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_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02.i -s /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/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 67768b34e7b9299b4c0862a201d7fe793c7261b3 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 00:57:53,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:57:53,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:57:53,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:57:53,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:57:53,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:57:53,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:57:53,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:57:53,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:57:53,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:57:53,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:57:53,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:57:53,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:57:53,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:57:53,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:57:53,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:57:53,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:57:53,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:57:53,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:57:53,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:57:53,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:57:53,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:57:53,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:57:53,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:57:53,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:57:53,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:57:53,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:57:53,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:57:53,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:57:53,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:57:53,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:57:53,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:57:53,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:57:53,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:57:53,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:57:53,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:57:53,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:57:53,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:57:53,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:57:53,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:57:53,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:57:53,818 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:57:53,866 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:57:53,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:57:53,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:57:53,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:57:53,875 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:57:53,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:57:53,876 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:57:53,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:57:53,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:57:53,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:57:53,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:57:53,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:57:53,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:57:53,878 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:57:53,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:57:53,879 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:57:53,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:57:53,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:57:53,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:57:53,880 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:57:53,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:57:53,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:57:53,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:57:53,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:57:53,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:57:53,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:57:53,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:57:53,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:57:53,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:57:53,883 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_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67768b34e7b9299b4c0862a201d7fe793c7261b3 [2020-11-30 00:57:54,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:57:54,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:57:54,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:57:54,257 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:57:54,258 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:57:54,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/bin/uautomizer/../../sv-benchmarks/c/loops/sum01_bug02.i [2020-11-30 00:57:54,364 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/bin/uautomizer/data/cb45fd59f/d7aeb9c9beb349bebdb98762e6541592/FLAG239c15f80 [2020-11-30 00:57:54,961 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:57:54,961 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/sv-benchmarks/c/loops/sum01_bug02.i [2020-11-30 00:57:54,969 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/bin/uautomizer/data/cb45fd59f/d7aeb9c9beb349bebdb98762e6541592/FLAG239c15f80 [2020-11-30 00:57:55,321 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/bin/uautomizer/data/cb45fd59f/d7aeb9c9beb349bebdb98762e6541592 [2020-11-30 00:57:55,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:57:55,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:57:55,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:57:55,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:57:55,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:57:55,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:57:55" (1/1) ... [2020-11-30 00:57:55,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bff4679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:57:55, skipping insertion in model container [2020-11-30 00:57:55,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:57:55" (1/1) ... [2020-11-30 00:57:55,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:57:55,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:57:55,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:57:55,626 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:57:55,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:57:55,680 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:57:55,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:57:55 WrapperNode [2020-11-30 00:57:55,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:57:55,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:57:55,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:57:55,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:57:55,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:57:55" (1/1) ... [2020-11-30 00:57:55,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:57:55" (1/1) ... [2020-11-30 00:57:55,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:57:55,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:57:55,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:57:55,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:57:55,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:57:55" (1/1) ... [2020-11-30 00:57:55,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:57:55" (1/1) ... [2020-11-30 00:57:55,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:57:55" (1/1) ... [2020-11-30 00:57:55,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:57:55" (1/1) ... [2020-11-30 00:57:55,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:57:55" (1/1) ... [2020-11-30 00:57:55,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:57:55" (1/1) ... [2020-11-30 00:57:55,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:57:55" (1/1) ... [2020-11-30 00:57:55,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:57:55,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:57:55,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:57:55,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:57:55,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:57:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/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 00:57:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:57:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:57:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:57:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:57:56,192 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:57:56,192 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 00:57:56,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:57:56 BoogieIcfgContainer [2020-11-30 00:57:56,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:57:56,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:57:56,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:57:56,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:57:56,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:57:55" (1/3) ... [2020-11-30 00:57:56,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41984af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:57:56, skipping insertion in model container [2020-11-30 00:57:56,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:57:55" (2/3) ... [2020-11-30 00:57:56,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41984af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:57:56, skipping insertion in model container [2020-11-30 00:57:56,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:57:56" (3/3) ... [2020-11-30 00:57:56,225 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-11-30 00:57:56,239 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:57:56,260 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:57:56,292 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:57:56,337 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:57:56,337 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:57:56,337 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:57:56,338 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:57:56,338 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:57:56,338 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:57:56,338 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:57:56,338 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:57:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-30 00:57:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 00:57:56,360 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:57:56,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:57:56,361 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:57:56,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:57:56,370 INFO L82 PathProgramCache]: Analyzing trace with hash 590808584, now seen corresponding path program 1 times [2020-11-30 00:57:56,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:57:56,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610065881] [2020-11-30 00:57:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:57:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:57:56,588 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 00:57:56,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610065881] [2020-11-30 00:57:56,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:57:56,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 00:57:56,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715789637] [2020-11-30 00:57:56,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 00:57:56,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:57:56,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 00:57:56,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 00:57:56,632 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-11-30 00:57:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:57:56,653 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-11-30 00:57:56,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 00:57:56,655 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-30 00:57:56,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:57:56,678 INFO L225 Difference]: With dead ends: 25 [2020-11-30 00:57:56,679 INFO L226 Difference]: Without dead ends: 12 [2020-11-30 00:57:56,683 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 00:57:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-30 00:57:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-30 00:57:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 00:57:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-30 00:57:56,729 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-11-30 00:57:56,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:57:56,730 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-30 00:57:56,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 00:57:56,731 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-30 00:57:56,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 00:57:56,733 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:57:56,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:57:56,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:57:56,734 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:57:56,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:57:56,739 INFO L82 PathProgramCache]: Analyzing trace with hash 218629621, now seen corresponding path program 1 times [2020-11-30 00:57:56,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:57:56,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869898373] [2020-11-30 00:57:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:57:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:57:56,922 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 00:57:56,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869898373] [2020-11-30 00:57:56,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:57:56,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:57:56,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752347703] [2020-11-30 00:57:56,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:57:56,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:57:56,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:57:56,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:57:56,927 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2020-11-30 00:57:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:57:57,012 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-11-30 00:57:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:57:57,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-30 00:57:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:57:57,014 INFO L225 Difference]: With dead ends: 22 [2020-11-30 00:57:57,015 INFO L226 Difference]: Without dead ends: 16 [2020-11-30 00:57:57,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:57:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-30 00:57:57,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-30 00:57:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-30 00:57:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-30 00:57:57,021 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-11-30 00:57:57,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:57:57,021 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-30 00:57:57,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:57:57,022 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-11-30 00:57:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 00:57:57,022 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:57:57,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:57:57,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:57:57,023 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:57:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:57:57,024 INFO L82 PathProgramCache]: Analyzing trace with hash 212204378, now seen corresponding path program 1 times [2020-11-30 00:57:57,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:57:57,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978224790] [2020-11-30 00:57:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:57:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:57:57,395 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 00:57:57,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978224790] [2020-11-30 00:57:57,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464832705] [2020-11-30 00:57:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/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 00:57:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:57:57,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 00:57:57,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:57:57,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:57:57,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 00:57:57,692 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 00:57:57,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:57:57,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-11-30 00:57:57,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018160529] [2020-11-30 00:57:57,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 00:57:57,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:57:57,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 00:57:57,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:57:57,696 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 12 states. [2020-11-30 00:57:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:57:57,862 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-11-30 00:57:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 00:57:57,863 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-11-30 00:57:57,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:57:57,866 INFO L225 Difference]: With dead ends: 32 [2020-11-30 00:57:57,866 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 00:57:57,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:57:57,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 00:57:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-11-30 00:57:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 00:57:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-30 00:57:57,880 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2020-11-30 00:57:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:57:57,881 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-30 00:57:57,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 00:57:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-30 00:57:57,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 00:57:57,882 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:57:57,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:57:58,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 00:57:58,089 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:57:58,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:57:58,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2010166847, now seen corresponding path program 2 times [2020-11-30 00:57:58,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:57:58,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242095042] [2020-11-30 00:57:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:57:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:57:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:57:58,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242095042] [2020-11-30 00:57:58,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567626599] [2020-11-30 00:57:58,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/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 00:57:58,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:57:58,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:57:58,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 00:57:58,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:57:58,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 00:57:58,742 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-30 00:57:58,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 00:57:58,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:57:58,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 00:57:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:57:58,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:57:58,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-30 00:57:58,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198926654] [2020-11-30 00:57:58,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 00:57:58,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:57:58,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 00:57:58,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-11-30 00:57:58,792 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 16 states. [2020-11-30 00:57:59,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:57:59,378 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-11-30 00:57:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 00:57:59,379 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2020-11-30 00:57:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:57:59,381 INFO L225 Difference]: With dead ends: 46 [2020-11-30 00:57:59,381 INFO L226 Difference]: Without dead ends: 38 [2020-11-30 00:57:59,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-11-30 00:57:59,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-30 00:57:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-11-30 00:57:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 00:57:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-11-30 00:57:59,390 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2020-11-30 00:57:59,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:57:59,390 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-11-30 00:57:59,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 00:57:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-11-30 00:57:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 00:57:59,391 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:57:59,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:57:59,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:57:59,593 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:57:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:57:59,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1604742079, now seen corresponding path program 1 times [2020-11-30 00:57:59,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:57:59,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805830394] [2020-11-30 00:57:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:57:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:57:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:57:59,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805830394] [2020-11-30 00:57:59,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107336076] [2020-11-30 00:57:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/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 00:57:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:57:59,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 00:57:59,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:57:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:57:59,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:57:59,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-11-30 00:57:59,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551147043] [2020-11-30 00:57:59,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:57:59,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:57:59,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:57:59,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:57:59,822 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 8 states. [2020-11-30 00:57:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:57:59,897 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-11-30 00:57:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:57:59,898 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-30 00:57:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:57:59,899 INFO L225 Difference]: With dead ends: 39 [2020-11-30 00:57:59,899 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 00:57:59,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:57:59,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 00:57:59,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-30 00:57:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 00:57:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-30 00:57:59,909 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-11-30 00:57:59,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:57:59,910 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-30 00:57:59,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:57:59,910 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-30 00:57:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 00:57:59,911 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:57:59,911 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:00,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:00,112 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1338878810, now seen corresponding path program 2 times [2020-11-30 00:58:00,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:00,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832454751] [2020-11-30 00:58:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:58:00,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832454751] [2020-11-30 00:58:00,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344921596] [2020-11-30 00:58:00,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/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 00:58:00,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:58:00,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:58:00,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 00:58:00,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:58:00,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:00,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-11-30 00:58:00,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822998731] [2020-11-30 00:58:00,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 00:58:00,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:00,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 00:58:00,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=70, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:58:00,397 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 12 states. [2020-11-30 00:58:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:00,497 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-11-30 00:58:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:58:00,500 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-11-30 00:58:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:00,501 INFO L225 Difference]: With dead ends: 35 [2020-11-30 00:58:00,501 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 00:58:00,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=70, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:58:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 00:58:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-30 00:58:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 00:58:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-11-30 00:58:00,508 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2020-11-30 00:58:00,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:00,508 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-11-30 00:58:00,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 00:58:00,508 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-11-30 00:58:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 00:58:00,509 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:00,510 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:00,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:00,710 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:00,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:00,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2102297463, now seen corresponding path program 3 times [2020-11-30 00:58:00,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:00,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704348725] [2020-11-30 00:58:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 00:58:00,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704348725] [2020-11-30 00:58:00,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278579855] [2020-11-30 00:58:00,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/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 00:58:01,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-30 00:58:01,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:58:01,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 00:58:01,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:01,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 00:58:01,440 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-30 00:58:01,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 00:58:01,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:58:01,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 00:58:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:58:01,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:01,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2020-11-30 00:58:01,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846704749] [2020-11-30 00:58:01,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-30 00:58:01,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:01,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-30 00:58:01,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-11-30 00:58:01,517 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 21 states. [2020-11-30 00:58:02,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:02,450 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-11-30 00:58:02,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-30 00:58:02,451 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-30 00:58:02,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:02,451 INFO L225 Difference]: With dead ends: 48 [2020-11-30 00:58:02,451 INFO L226 Difference]: Without dead ends: 40 [2020-11-30 00:58:02,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2020-11-30 00:58:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-30 00:58:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-11-30 00:58:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 00:58:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-11-30 00:58:02,458 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2020-11-30 00:58:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:02,458 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-11-30 00:58:02,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-30 00:58:02,459 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-11-30 00:58:02,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 00:58:02,459 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:02,460 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:02,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-30 00:58:02,672 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1422239093, now seen corresponding path program 3 times [2020-11-30 00:58:02,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:02,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359683915] [2020-11-30 00:58:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:58:02,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359683915] [2020-11-30 00:58:02,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352648948] [2020-11-30 00:58:02,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/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 00:58:02,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-30 00:58:02,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:58:02,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 00:58:02,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:58:03,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:03,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-11-30 00:58:03,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008575834] [2020-11-30 00:58:03,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 00:58:03,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:03,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 00:58:03,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=131, Unknown=0, NotChecked=0, Total=240 [2020-11-30 00:58:03,078 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 16 states. [2020-11-30 00:58:03,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:03,161 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-11-30 00:58:03,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 00:58:03,162 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-11-30 00:58:03,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:03,162 INFO L225 Difference]: With dead ends: 41 [2020-11-30 00:58:03,162 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 00:58:03,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=131, Unknown=0, NotChecked=0, Total=240 [2020-11-30 00:58:03,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 00:58:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-11-30 00:58:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 00:58:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-30 00:58:03,166 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2020-11-30 00:58:03,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:03,166 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-30 00:58:03,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 00:58:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-30 00:58:03,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 00:58:03,167 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:03,167 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:03,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:03,368 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:03,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:03,368 INFO L82 PathProgramCache]: Analyzing trace with hash 894625264, now seen corresponding path program 4 times [2020-11-30 00:58:03,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:03,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667560309] [2020-11-30 00:58:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:58:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:58:03,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667560309] [2020-11-30 00:58:03,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146511348] [2020-11-30 00:58:03,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:03,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 00:58:03,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:58:03,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 00:58:03,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:58:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:58:03,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:58:03,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-11-30 00:58:03,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125715464] [2020-11-30 00:58:03,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 00:58:03,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:58:03,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 00:58:03,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=212, Unknown=0, NotChecked=0, Total=380 [2020-11-30 00:58:03,770 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 20 states. [2020-11-30 00:58:03,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:58:03,901 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-11-30 00:58:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 00:58:03,908 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-11-30 00:58:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:58:03,909 INFO L225 Difference]: With dead ends: 46 [2020-11-30 00:58:03,909 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 00:58:03,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=212, Unknown=0, NotChecked=0, Total=380 [2020-11-30 00:58:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 00:58:03,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-11-30 00:58:03,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 00:58:03,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-30 00:58:03,915 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 28 [2020-11-30 00:58:03,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:58:03,915 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-30 00:58:03,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 00:58:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-30 00:58:03,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-30 00:58:03,922 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:58:03,922 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:58:04,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:58:04,123 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:58:04,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:58:04,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1614989611, now seen corresponding path program 5 times [2020-11-30 00:58:04,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:58:04,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623096411] [2020-11-30 00:58:04,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:58:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:58:04,176 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:58:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:58:04,197 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:58:04,233 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:58:04,233 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:58:04,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-30 00:58:04,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:58:04 BoogieIcfgContainer [2020-11-30 00:58:04,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:58:04,298 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:58:04,298 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:58:04,299 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:58:04,299 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:57:56" (3/4) ... [2020-11-30 00:58:04,302 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 00:58:04,375 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8e33bacd-2dd1-4f08-81a4-03117f3cc6c3/bin/uautomizer/witness.graphml [2020-11-30 00:58:04,375 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:58:04,382 INFO L168 Benchmark]: Toolchain (without parser) took 9054.61 ms. Allocated memory was 102.8 MB in the beginning and 138.4 MB in the end (delta: 35.7 MB). Free memory was 76.8 MB in the beginning and 108.0 MB in the end (delta: -31.2 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:58:04,388 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 102.8 MB. Free memory is still 61.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:58:04,389 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.19 ms. Allocated memory is still 102.8 MB. Free memory was 76.8 MB in the beginning and 80.7 MB in the end (delta: -3.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:58:04,390 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.39 ms. Allocated memory is still 102.8 MB. Free memory was 80.7 MB in the beginning and 79.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:58:04,390 INFO L168 Benchmark]: Boogie Preprocessor took 53.78 ms. Allocated memory is still 102.8 MB. Free memory was 79.2 MB in the beginning and 78.2 MB in the end (delta: 932.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:58:04,391 INFO L168 Benchmark]: RCFGBuilder took 403.47 ms. Allocated memory is still 102.8 MB. Free memory was 78.2 MB in the beginning and 67.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:58:04,391 INFO L168 Benchmark]: TraceAbstraction took 8100.95 ms. Allocated memory was 102.8 MB in the beginning and 138.4 MB in the end (delta: 35.7 MB). Free memory was 66.6 MB in the beginning and 110.1 MB in the end (delta: -43.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:58:04,392 INFO L168 Benchmark]: Witness Printer took 77.38 ms. Allocated memory is still 138.4 MB. Free memory was 110.1 MB in the beginning and 108.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:58:04,395 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 102.8 MB. Free memory is still 61.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 355.19 ms. Allocated memory is still 102.8 MB. Free memory was 76.8 MB in the beginning and 80.7 MB in the end (delta: -3.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.39 ms. Allocated memory is still 102.8 MB. Free memory was 80.7 MB in the beginning and 79.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.78 ms. Allocated memory is still 102.8 MB. Free memory was 79.2 MB in the beginning and 78.2 MB in the end (delta: 932.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 403.47 ms. Allocated memory is still 102.8 MB. Free memory was 78.2 MB in the beginning and 67.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8100.95 ms. Allocated memory was 102.8 MB in the beginning and 138.4 MB in the end (delta: 35.7 MB). Free memory was 66.6 MB in the beginning and 110.1 MB in the end (delta: -43.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 77.38 ms. Allocated memory is still 138.4 MB. Free memory was 110.1 MB in the beginning and 108.0 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: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i