./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 231a10bb05ed6dc00d2658e900a2b37af0aae558 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:49:44,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:49:44,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:49:44,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:49:44,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:49:44,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:49:44,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:49:44,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:49:44,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:49:44,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:49:44,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:49:44,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:49:44,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:49:44,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:49:44,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:49:44,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:49:44,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:49:44,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:49:44,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:49:44,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:49:44,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:49:44,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:49:44,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:49:44,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:49:44,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:49:44,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:49:44,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:49:44,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:49:44,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:49:44,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:49:44,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:49:44,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:49:44,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:49:44,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:49:44,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:49:44,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:49:44,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:49:44,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:49:44,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:49:44,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:49:44,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:49:44,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:49:44,896 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:49:44,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:49:44,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:49:44,898 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:49:44,898 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:49:44,898 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:49:44,898 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:49:44,899 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:49:44,899 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:49:44,899 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:49:44,899 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:49:44,899 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:49:44,900 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:49:44,900 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:49:44,900 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:49:44,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:49:44,901 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:49:44,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:49:44,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:49:44,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:49:44,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:49:44,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:49:44,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:49:44,903 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:49:44,903 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:49:44,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:49:44,903 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:49:44,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:49:44,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:49:44,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:49:44,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:49:44,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:49:44,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:49:44,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:49:44,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:49:44,905 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:49:44,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:49:44,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:49:44,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:49:44,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:49:44,906 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 231a10bb05ed6dc00d2658e900a2b37af0aae558 [2020-11-22 12:49:45,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:49:45,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:49:45,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:49:45,219 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:49:45,220 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:49:45,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2020-11-22 12:49:45,296 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/data/f6b095a86/109a944789254ed7869cd9faf97a0da1/FLAGbf81e9158 [2020-11-22 12:49:45,867 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:49:45,869 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2020-11-22 12:49:45,881 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/data/f6b095a86/109a944789254ed7869cd9faf97a0da1/FLAGbf81e9158 [2020-11-22 12:49:46,223 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/data/f6b095a86/109a944789254ed7869cd9faf97a0da1 [2020-11-22 12:49:46,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:49:46,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:49:46,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:49:46,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:49:46,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:49:46,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:49:46" (1/1) ... [2020-11-22 12:49:46,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@797af7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46, skipping insertion in model container [2020-11-22 12:49:46,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:49:46" (1/1) ... [2020-11-22 12:49:46,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:49:46,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:49:46,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:49:46,483 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:49:46,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:49:46,521 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:49:46,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46 WrapperNode [2020-11-22 12:49:46,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:49:46,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:49:46,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:49:46,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:49:46,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46" (1/1) ... [2020-11-22 12:49:46,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46" (1/1) ... [2020-11-22 12:49:46,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:49:46,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:49:46,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:49:46,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:49:46,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46" (1/1) ... [2020-11-22 12:49:46,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46" (1/1) ... [2020-11-22 12:49:46,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46" (1/1) ... [2020-11-22 12:49:46,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46" (1/1) ... [2020-11-22 12:49:46,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46" (1/1) ... [2020-11-22 12:49:46,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46" (1/1) ... [2020-11-22 12:49:46,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46" (1/1) ... [2020-11-22 12:49:46,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:49:46,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:49:46,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:49:46,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:49:46,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:49:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:49:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:49:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:49:46,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:49:47,378 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:49:47,378 INFO L298 CfgBuilder]: Removed 40 assume(true) statements. [2020-11-22 12:49:47,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:47 BoogieIcfgContainer [2020-11-22 12:49:47,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:49:47,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:49:47,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:49:47,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:49:47,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:49:46" (1/3) ... [2020-11-22 12:49:47,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6541b2f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:49:47, skipping insertion in model container [2020-11-22 12:49:47,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:49:46" (2/3) ... [2020-11-22 12:49:47,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6541b2f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:49:47, skipping insertion in model container [2020-11-22 12:49:47,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:47" (3/3) ... [2020-11-22 12:49:47,390 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound2.c [2020-11-22 12:49:47,401 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:49:47,405 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-22 12:49:47,416 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-22 12:49:47,452 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:49:47,452 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:49:47,452 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:49:47,452 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:49:47,453 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:49:47,453 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:49:47,453 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:49:47,454 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:49:47,473 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-11-22 12:49:47,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 12:49:47,479 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:47,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 12:49:47,481 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:47,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:47,491 INFO L82 PathProgramCache]: Analyzing trace with hash 5632582, now seen corresponding path program 1 times [2020-11-22 12:49:47,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:47,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989601388] [2020-11-22 12:49:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:47,607 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:49:47,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090769768] [2020-11-22 12:49:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:49:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:47,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-22 12:49:47,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:47,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:47,897 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:49:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:47,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989601388] [2020-11-22 12:49:47,916 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:47,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090769768] [2020-11-22 12:49:47,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:47,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 12:49:47,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915680998] [2020-11-22 12:49:47,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:49:47,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:47,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:49:47,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:49:47,941 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2020-11-22 12:49:48,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:48,110 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2020-11-22 12:49:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:49:48,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-22 12:49:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:48,121 INFO L225 Difference]: With dead ends: 75 [2020-11-22 12:49:48,121 INFO L226 Difference]: Without dead ends: 38 [2020-11-22 12:49:48,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:49:48,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-22 12:49:48,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2020-11-22 12:49:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-22 12:49:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-22 12:49:48,161 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 4 [2020-11-22 12:49:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:48,162 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-22 12:49:48,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:49:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-22 12:49:48,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 12:49:48,163 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:48,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 12:49:48,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-22 12:49:48,376 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:48,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:48,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1118130985, now seen corresponding path program 1 times [2020-11-22 12:49:48,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:48,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524036630] [2020-11-22 12:49:48,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:48,393 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:49:48,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942216956] [2020-11-22 12:49:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:49:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:48,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-22 12:49:48,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:48,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:48,483 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:49:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:48,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524036630] [2020-11-22 12:49:48,493 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:48,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942216956] [2020-11-22 12:49:48,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:48,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 12:49:48,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929620665] [2020-11-22 12:49:48,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:49:48,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:48,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:49:48,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:49:48,497 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 5 states. [2020-11-22 12:49:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:48,614 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-11-22 12:49:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:49:48,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-22 12:49:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:48,617 INFO L225 Difference]: With dead ends: 52 [2020-11-22 12:49:48,617 INFO L226 Difference]: Without dead ends: 44 [2020-11-22 12:49:48,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:49:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-22 12:49:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-11-22 12:49:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-22 12:49:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-11-22 12:49:48,628 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 6 [2020-11-22 12:49:48,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:48,628 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-11-22 12:49:48,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:49:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-11-22 12:49:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 12:49:48,629 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:48,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:48,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:49:48,830 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:48,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:48,831 INFO L82 PathProgramCache]: Analyzing trace with hash -899235937, now seen corresponding path program 1 times [2020-11-22 12:49:48,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:48,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044571888] [2020-11-22 12:49:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:48,846 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:49:48,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724003953] [2020-11-22 12:49:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:49:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:48,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 12:49:48,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:48,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 12:49:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:48,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:48,954 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:49:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:48,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044571888] [2020-11-22 12:49:48,962 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:48,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724003953] [2020-11-22 12:49:48,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:49:48,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-22 12:49:48,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169782425] [2020-11-22 12:49:48,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:49:48,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:48,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:49:48,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:49:48,964 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 4 states. [2020-11-22 12:49:49,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:49,078 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-11-22 12:49:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:49:49,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-22 12:49:49,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:49,079 INFO L225 Difference]: With dead ends: 44 [2020-11-22 12:49:49,080 INFO L226 Difference]: Without dead ends: 42 [2020-11-22 12:49:49,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:49:49,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-22 12:49:49,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-11-22 12:49:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-22 12:49:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-11-22 12:49:49,090 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 13 [2020-11-22 12:49:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:49,090 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-11-22 12:49:49,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:49:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-11-22 12:49:49,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 12:49:49,091 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:49,091 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:49,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:49:49,308 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:49,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:49,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1449299222, now seen corresponding path program 1 times [2020-11-22 12:49:49,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:49,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625842789] [2020-11-22 12:49:49,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:49,323 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:49:49,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320176815] [2020-11-22 12:49:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/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 [2020-11-22 12:49:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:49,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-22 12:49:49,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:49,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:49,438 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:49:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:49,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625842789] [2020-11-22 12:49:49,495 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:49,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320176815] [2020-11-22 12:49:49,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741240109] [2020-11-22 12:49:49,513 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-22 12:49:49,513 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:49:49,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:49:49,523 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:49:49,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:49:49,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:49:50,141 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:49:50,605 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-11-22 12:49:50,851 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-11-22 12:49:51,192 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-11-22 12:49:51,420 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-11-22 12:49:51,700 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-11-22 12:49:51,989 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-11-22 12:49:52,227 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-11-22 12:49:52,659 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-11-22 12:49:52,660 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:52,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:49:52,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-22 12:49:52,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900968084] [2020-11-22 12:49:52,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 12:49:52,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:52,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 12:49:52,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-22 12:49:52,663 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 8 states. [2020-11-22 12:49:52,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:52,665 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-11-22 12:49:52,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:49:52,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-22 12:49:52,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:52,665 INFO L225 Difference]: With dead ends: 40 [2020-11-22 12:49:52,665 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:49:52,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-22 12:49:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:49:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:49:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:49:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:49:52,667 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-11-22 12:49:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:52,667 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:49:52,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 12:49:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:49:52,667 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:49:52,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:49:52,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 12:49:52,935 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:49:52,935 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:49:52,935 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 12:49:52,936 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:49:52,936 INFO L270 CegarLoopResult]: At program point L38-2(lines 38 62) the Hoare annotation is: false [2020-11-22 12:49:52,936 INFO L274 CegarLoopResult]: For program point L38-3(lines 38 62) no Hoare annotation was computed. [2020-11-22 12:49:52,936 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:49:52,936 INFO L270 CegarLoopResult]: At program point L47-2(lines 47 59) the Hoare annotation is: false [2020-11-22 12:49:52,936 INFO L274 CegarLoopResult]: For program point L47-3(lines 47 59) no Hoare annotation was computed. [2020-11-22 12:49:52,936 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:49:52,936 INFO L274 CegarLoopResult]: For program point L15(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:49:52,936 INFO L270 CegarLoopResult]: At program point L15-1(lines 14 20) the Hoare annotation is: false [2020-11-22 12:49:52,937 INFO L274 CegarLoopResult]: For program point L15-2(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:49:52,937 INFO L270 CegarLoopResult]: At program point L15-3(lines 42 43) the Hoare annotation is: false [2020-11-22 12:49:52,937 INFO L274 CegarLoopResult]: For program point L15-4(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:49:52,937 INFO L270 CegarLoopResult]: At program point L15-5(lines 14 20) the Hoare annotation is: false [2020-11-22 12:49:52,937 INFO L274 CegarLoopResult]: For program point L15-6(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:49:52,937 INFO L270 CegarLoopResult]: At program point L15-7(lines 14 20) the Hoare annotation is: false [2020-11-22 12:49:52,937 INFO L274 CegarLoopResult]: For program point L15-8(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:49:52,937 INFO L270 CegarLoopResult]: At program point L15-9(lines 52 53) the Hoare annotation is: false [2020-11-22 12:49:52,937 INFO L274 CegarLoopResult]: For program point L15-10(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:49:52,937 INFO L270 CegarLoopResult]: At program point L15-11(lines 14 20) the Hoare annotation is: false [2020-11-22 12:49:52,937 INFO L274 CegarLoopResult]: For program point L15-12(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:49:52,938 INFO L270 CegarLoopResult]: At program point L15-13(lines 14 20) the Hoare annotation is: (= ULTIMATE.start_main_~b~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~y~0)) [2020-11-22 12:49:52,938 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:49:52,938 INFO L274 CegarLoopResult]: For program point L16(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:49:52,938 INFO L274 CegarLoopResult]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:49:52,938 INFO L274 CegarLoopResult]: For program point L16-2(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:49:52,938 INFO L274 CegarLoopResult]: For program point L16-3(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:49:52,938 INFO L274 CegarLoopResult]: For program point L16-4(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:49:52,938 INFO L274 CegarLoopResult]: For program point L16-5(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:49:52,938 INFO L274 CegarLoopResult]: For program point L16-6(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:49:52,938 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 12:49:52,939 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:49:52,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:49:52 BoogieIcfgContainer [2020-11-22 12:49:52,980 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:49:52,981 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:49:52,981 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:49:52,981 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:49:52,981 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:49:47" (3/4) ... [2020-11-22 12:49:52,985 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:49:53,001 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2020-11-22 12:49:53,001 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-22 12:49:53,002 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-22 12:49:53,002 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:49:53,068 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8c6b2c80-d320-4dac-9d3c-fb1b60dcbe73/bin/utaipan/witness.graphml [2020-11-22 12:49:53,069 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:49:53,070 INFO L168 Benchmark]: Toolchain (without parser) took 6842.46 ms. Allocated memory was 102.8 MB in the beginning and 167.8 MB in the end (delta: 65.0 MB). Free memory was 69.7 MB in the beginning and 140.8 MB in the end (delta: -71.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:49:53,070 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 102.8 MB. Free memory was 75.3 MB in the beginning and 75.3 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:49:53,071 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.53 ms. Allocated memory is still 102.8 MB. Free memory was 69.5 MB in the beginning and 79.0 MB in the end (delta: -9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:53,071 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.82 ms. Allocated memory is still 102.8 MB. Free memory was 79.0 MB in the beginning and 77.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:53,072 INFO L168 Benchmark]: Boogie Preprocessor took 48.49 ms. Allocated memory is still 102.8 MB. Free memory was 77.3 MB in the beginning and 76.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:49:53,072 INFO L168 Benchmark]: RCFGBuilder took 756.65 ms. Allocated memory is still 102.8 MB. Free memory was 76.3 MB in the beginning and 50.1 MB in the end (delta: 26.2 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:53,073 INFO L168 Benchmark]: TraceAbstraction took 5598.48 ms. Allocated memory was 102.8 MB in the beginning and 167.8 MB in the end (delta: 65.0 MB). Free memory was 49.7 MB in the beginning and 144.0 MB in the end (delta: -94.3 MB). Peak memory consumption was 62.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:53,076 INFO L168 Benchmark]: Witness Printer took 88.21 ms. Allocated memory is still 167.8 MB. Free memory was 144.0 MB in the beginning and 140.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:53,078 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 102.8 MB. Free memory was 75.3 MB in the beginning and 75.3 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 285.53 ms. Allocated memory is still 102.8 MB. Free memory was 69.5 MB in the beginning and 79.0 MB in the end (delta: -9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.82 ms. Allocated memory is still 102.8 MB. Free memory was 79.0 MB in the beginning and 77.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.49 ms. Allocated memory is still 102.8 MB. Free memory was 77.3 MB in the beginning and 76.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 756.65 ms. Allocated memory is still 102.8 MB. Free memory was 76.3 MB in the beginning and 50.1 MB in the end (delta: 26.2 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5598.48 ms. Allocated memory was 102.8 MB in the beginning and 167.8 MB in the end (delta: 65.0 MB). Free memory was 49.7 MB in the beginning and 144.0 MB in the end (delta: -94.3 MB). Peak memory consumption was 62.4 MB. Max. memory is 16.1 GB. * Witness Printer took 88.21 ms. Allocated memory is still 167.8 MB. Free memory was 144.0 MB in the beginning and 140.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: b == a * y - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 49 SDtfs, 80 SDslu, 69 SDs, 0 SdLazy, 125 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=2, 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, 4 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 11 NumberOfFragments, 13 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 11 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 6508 SizeOfPredicates, 28 NumberOfNonLiveVariables, 298 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 0/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...