./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.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_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/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 1ee118516e232ad8cb9bc41eea534ff0bb107413 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-28 02:58:32,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:58:32,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:58:32,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:58:32,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:58:32,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:58:32,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:58:32,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:58:32,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:58:32,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:58:32,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:58:32,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:58:32,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:58:32,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:58:32,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:58:32,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:58:32,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:58:32,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:58:32,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:58:32,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:58:32,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:58:32,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:58:32,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:58:32,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:58:32,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:58:32,261 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:58:32,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:58:32,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:58:32,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:58:32,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:58:32,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:58:32,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:58:32,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:58:32,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:58:32,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:58:32,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:58:32,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:58:32,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:58:32,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:58:32,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:58:32,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:58:32,291 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:58:32,315 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:58:32,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:58:32,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:58:32,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:58:32,317 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:58:32,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:58:32,318 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:58:32,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:58:32,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:58:32,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:58:32,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:58:32,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:58:32,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:58:32,319 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:58:32,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:58:32,320 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:58:32,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:58:32,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:58:32,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:58:32,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:58:32,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:58:32,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:58:32,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:58:32,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:58:32,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:58:32,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:58:32,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:58:32,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:58:32,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:58:32,324 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_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ee118516e232ad8cb9bc41eea534ff0bb107413 [2020-11-28 02:58:32,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:58:32,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:58:32,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:58:32,588 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:58:32,590 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:58:32,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.c [2020-11-28 02:58:32,672 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/data/dbee60547/8fd1618ddf9647839bf399feaac6e3a3/FLAG9b9a77434 [2020-11-28 02:58:33,245 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:58:33,245 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.c [2020-11-28 02:58:33,251 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/data/dbee60547/8fd1618ddf9647839bf399feaac6e3a3/FLAG9b9a77434 [2020-11-28 02:58:33,623 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/data/dbee60547/8fd1618ddf9647839bf399feaac6e3a3 [2020-11-28 02:58:33,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:58:33,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:58:33,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:33,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:58:33,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:58:33,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c80c63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33, skipping insertion in model container [2020-11-28 02:58:33,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:58:33,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:58:33,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:33,836 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:58:33,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:33,877 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:58:33,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33 WrapperNode [2020-11-28 02:58:33,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:33,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:33,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:58:33,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:58:33,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,899 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:33,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:58:33,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:58:33,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:58:33,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:58:33,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:58:33,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:58:33,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:58:33,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:58:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:58:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:58:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:58:34,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:58:34,343 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:58:34,344 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-11-28 02:58:34,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:34 BoogieIcfgContainer [2020-11-28 02:58:34,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:58:34,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:58:34,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:58:34,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:58:34,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:58:33" (1/3) ... [2020-11-28 02:58:34,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2eae71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:34, skipping insertion in model container [2020-11-28 02:58:34,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (2/3) ... [2020-11-28 02:58:34,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2eae71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:34, skipping insertion in model container [2020-11-28 02:58:34,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:34" (3/3) ... [2020-11-28 02:58:34,367 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound2.c [2020-11-28 02:58:34,382 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:58:34,390 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-28 02:58:34,419 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-28 02:58:34,442 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:58:34,443 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:58:34,443 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:58:34,443 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:58:34,443 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:58:34,444 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:58:34,444 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:58:34,444 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:58:34,476 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-28 02:58:34,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 02:58:34,483 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:34,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:34,484 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:34,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:34,490 INFO L82 PathProgramCache]: Analyzing trace with hash 120151435, now seen corresponding path program 1 times [2020-11-28 02:58:34,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:34,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601107672] [2020-11-28 02:58:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:34,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601107672] [2020-11-28 02:58:34,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:34,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 02:58:34,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774136227] [2020-11-28 02:58:34,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 02:58:34,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:34,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 02:58:34,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:58:34,677 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-11-28 02:58:34,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:34,696 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-11-28 02:58:34,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 02:58:34,697 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-28 02:58:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:34,711 INFO L225 Difference]: With dead ends: 41 [2020-11-28 02:58:34,711 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 02:58:34,717 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 [2020-11-28 02:58:34,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 02:58:34,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-28 02:58:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 02:58:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-28 02:58:34,763 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-11-28 02:58:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:34,764 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-28 02:58:34,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 02:58:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-28 02:58:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 02:58:34,766 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:34,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:34,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:58:34,767 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:34,769 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-11-28 02:58:34,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:34,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265091544] [2020-11-28 02:58:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:34,806 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:34,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699982257] [2020-11-28 02:58:34,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:34,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:58:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:35,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265091544] [2020-11-28 02:58:35,010 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:35,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699982257] [2020-11-28 02:58:35,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:35,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:58:35,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720466752] [2020-11-28 02:58:35,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:58:35,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:35,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:58:35,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:58:35,014 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-11-28 02:58:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:35,906 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-11-28 02:58:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:58:35,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 02:58:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:35,907 INFO L225 Difference]: With dead ends: 36 [2020-11-28 02:58:35,907 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 02:58:35,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 02:58:35,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-11-28 02:58:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 02:58:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-11-28 02:58:35,912 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2020-11-28 02:58:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:35,912 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-11-28 02:58:35,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:58:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-11-28 02:58:35,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 02:58:35,913 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:35,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:36,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 02:58:36,114 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:36,115 INFO L82 PathProgramCache]: Analyzing trace with hash -908536776, now seen corresponding path program 1 times [2020-11-28 02:58:36,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:36,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221319813] [2020-11-28 02:58:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:36,139 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:36,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894653679] [2020-11-28 02:58:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:36,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 02:58:36,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:36,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221319813] [2020-11-28 02:58:36,297 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:36,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894653679] [2020-11-28 02:58:36,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:36,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 02:58:36,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710073925] [2020-11-28 02:58:36,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:36,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:36,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:36,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:36,300 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2020-11-28 02:58:36,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:36,571 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-11-28 02:58:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:58:36,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-28 02:58:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:36,574 INFO L225 Difference]: With dead ends: 39 [2020-11-28 02:58:36,574 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 02:58:36,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:58:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 02:58:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-11-28 02:58:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 02:58:36,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-11-28 02:58:36,585 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2020-11-28 02:58:36,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:36,586 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-11-28 02:58:36,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-11-28 02:58:36,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 02:58:36,587 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:36,587 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:36,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:36,788 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:36,789 INFO L82 PathProgramCache]: Analyzing trace with hash 624012856, now seen corresponding path program 1 times [2020-11-28 02:58:36,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:36,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956889874] [2020-11-28 02:58:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:36,814 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:36,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100285727] [2020-11-28 02:58:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:36,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 02:58:36,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:36,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956889874] [2020-11-28 02:58:36,964 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:36,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100285727] [2020-11-28 02:58:36,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:36,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-28 02:58:36,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240405221] [2020-11-28 02:58:36,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:36,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:36,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:36,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:36,967 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-11-28 02:58:37,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:37,021 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-11-28 02:58:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:58:37,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-28 02:58:37,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:37,024 INFO L225 Difference]: With dead ends: 34 [2020-11-28 02:58:37,024 INFO L226 Difference]: Without dead ends: 28 [2020-11-28 02:58:37,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:58:37,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-28 02:58:37,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-28 02:58:37,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 02:58:37,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-28 02:58:37,030 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2020-11-28 02:58:37,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:37,031 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-28 02:58:37,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:37,031 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-28 02:58:37,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 02:58:37,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:37,032 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:37,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:37,233 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash -683493948, now seen corresponding path program 2 times [2020-11-28 02:58:37,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:37,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648866861] [2020-11-28 02:58:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:37,246 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:37,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076964725] [2020-11-28 02:58:37,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:37,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:58:37,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:37,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:58:37,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:37,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648866861] [2020-11-28 02:58:37,399 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:37,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076964725] [2020-11-28 02:58:37,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:37,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 02:58:37,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746668009] [2020-11-28 02:58:37,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:58:37,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:37,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:58:37,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:58:37,401 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-11-28 02:58:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:37,440 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-11-28 02:58:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:58:37,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-28 02:58:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:37,442 INFO L225 Difference]: With dead ends: 38 [2020-11-28 02:58:37,442 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 02:58:37,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:58:37,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 02:58:37,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-28 02:58:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 02:58:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-11-28 02:58:37,448 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 16 [2020-11-28 02:58:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:37,448 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-11-28 02:58:37,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:58:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-11-28 02:58:37,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 02:58:37,449 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:37,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:37,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:37,650 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:37,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:37,650 INFO L82 PathProgramCache]: Analyzing trace with hash 253246609, now seen corresponding path program 1 times [2020-11-28 02:58:37,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:37,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864641415] [2020-11-28 02:58:37,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:37,665 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:37,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565211273] [2020-11-28 02:58:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:37,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 02:58:37,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:37,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 02:58:37,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 02:58:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:37,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864641415] [2020-11-28 02:58:37,868 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:37,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565211273] [2020-11-28 02:58:37,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:37,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-28 02:58:37,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630256964] [2020-11-28 02:58:37,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 02:58:37,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:37,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 02:58:37,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:58:37,870 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 8 states. [2020-11-28 02:58:38,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:38,059 INFO L93 Difference]: Finished difference Result 28 states and 27 transitions. [2020-11-28 02:58:38,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:58:38,060 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-11-28 02:58:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:38,061 INFO L225 Difference]: With dead ends: 28 [2020-11-28 02:58:38,061 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 02:58:38,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:58:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 02:58:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-28 02:58:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 02:58:38,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 21 transitions. [2020-11-28 02:58:38,066 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 21 transitions. Word has length 17 [2020-11-28 02:58:38,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:38,066 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 21 transitions. [2020-11-28 02:58:38,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 02:58:38,066 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 21 transitions. [2020-11-28 02:58:38,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 02:58:38,067 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:38,067 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:38,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 02:58:38,268 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:38,268 INFO L82 PathProgramCache]: Analyzing trace with hash 286481449, now seen corresponding path program 1 times [2020-11-28 02:58:38,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:38,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190207961] [2020-11-28 02:58:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:38,279 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:38,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610165961] [2020-11-28 02:58:38,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:38,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 02:58:38,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:38,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190207961] [2020-11-28 02:58:38,527 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 02:58:38,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610165961] [2020-11-28 02:58:38,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:38,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-28 02:58:38,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347844718] [2020-11-28 02:58:38,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:58:38,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:38,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:58:38,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:58:38,529 INFO L87 Difference]: Start difference. First operand 22 states and 21 transitions. Second operand 7 states. [2020-11-28 02:58:38,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:38,666 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2020-11-28 02:58:38,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:58:38,667 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-11-28 02:58:38,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:38,668 INFO L225 Difference]: With dead ends: 22 [2020-11-28 02:58:38,668 INFO L226 Difference]: Without dead ends: 20 [2020-11-28 02:58:38,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:58:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-28 02:58:38,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-28 02:58:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 02:58:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2020-11-28 02:58:38,672 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 17 [2020-11-28 02:58:38,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:38,673 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2020-11-28 02:58:38,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:58:38,673 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2020-11-28 02:58:38,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 02:58:38,673 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:38,674 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:38,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:38,900 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:38,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash 430952748, now seen corresponding path program 2 times [2020-11-28 02:58:38,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:38,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667206851] [2020-11-28 02:58:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:38,916 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 02:58:38,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178814274] [2020-11-28 02:58:38,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/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 [2020-11-28 02:58:38,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:58:38,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-28 02:58:38,973 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:39,145 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:39,169 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:39,169 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:58:39,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:39,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:58:39 BoogieIcfgContainer [2020-11-28 02:58:39,407 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:58:39,408 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:58:39,408 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:58:39,408 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:58:39,409 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:34" (3/4) ... [2020-11-28 02:58:39,411 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:58:39,463 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_68abeb0e-559f-4d5f-ad10-e76a7031bb3c/bin/uautomizer/witness.graphml [2020-11-28 02:58:39,463 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:58:39,465 INFO L168 Benchmark]: Toolchain (without parser) took 5836.08 ms. Allocated memory was 86.0 MB in the beginning and 132.1 MB in the end (delta: 46.1 MB). Free memory was 57.4 MB in the beginning and 64.1 MB in the end (delta: -6.7 MB). Peak memory consumption was 41.0 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:39,465 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 86.0 MB. Free memory was 56.3 MB in the beginning and 56.3 MB in the end (delta: 52.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:39,466 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.28 ms. Allocated memory is still 86.0 MB. Free memory was 57.3 MB in the beginning and 47.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:39,467 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.91 ms. Allocated memory is still 86.0 MB. Free memory was 47.5 MB in the beginning and 45.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:39,467 INFO L168 Benchmark]: Boogie Preprocessor took 39.12 ms. Allocated memory is still 86.0 MB. Free memory was 45.9 MB in the beginning and 44.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:39,468 INFO L168 Benchmark]: RCFGBuilder took 387.61 ms. Allocated memory is still 86.0 MB. Free memory was 44.8 MB in the beginning and 31.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:39,469 INFO L168 Benchmark]: TraceAbstraction took 5060.57 ms. Allocated memory was 86.0 MB in the beginning and 132.1 MB in the end (delta: 46.1 MB). Free memory was 31.5 MB in the beginning and 66.2 MB in the end (delta: -34.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:39,469 INFO L168 Benchmark]: Witness Printer took 55.26 ms. Allocated memory is still 132.1 MB. Free memory was 66.2 MB in the beginning and 64.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:39,472 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 86.0 MB. Free memory was 56.3 MB in the beginning and 56.3 MB in the end (delta: 52.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 249.28 ms. Allocated memory is still 86.0 MB. Free memory was 57.3 MB in the beginning and 47.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.91 ms. Allocated memory is still 86.0 MB. Free memory was 47.5 MB in the beginning and 45.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.12 ms. Allocated memory is still 86.0 MB. Free memory was 45.9 MB in the beginning and 44.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 387.61 ms. Allocated memory is still 86.0 MB. Free memory was 44.8 MB in the beginning and 31.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5060.57 ms. Allocated memory was 86.0 MB in the beginning and 132.1 MB in the end (delta: 46.1 MB). Free memory was 31.5 MB in the beginning and 66.2 MB in the end (delta: -34.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * Witness Printer took 55.26 ms. Allocated memory is still 132.1 MB. Free memory was 66.2 MB in the beginning and 64.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L7] COND FALSE !(!cond) VAL [counter=0] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [counter=0] [L28] EXPR counter++ VAL [counter=1] [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=1] [L28] EXPR counter++ VAL [counter=2] [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=2] [L28] EXPR counter++ VAL [counter=3] [L28] COND FALSE !(counter++<2) [L10] COND FALSE !(!(cond)) VAL [counter=3] [L10] COND TRUE !(cond) VAL [counter=3] [L3] __assert_fail("0", "ps6-ll.c", 3, "reach_error") VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.9s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 109 SDtfs, 67 SDslu, 176 SDs, 0 SdLazy, 161 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, 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, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 6516 SizeOfPredicates, 25 NumberOfNonLiveVariables, 495 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 8/27 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...