./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound1.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_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/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 d2e467e7f7f6c55f410dad37a6e857e419829655 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-22 12:51:24,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:51:24,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:51:24,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:51:24,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:51:24,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:51:24,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:51:24,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:51:24,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:51:24,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:51:24,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:51:24,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:51:24,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:51:24,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:51:24,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:51:24,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:51:24,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:51:24,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:51:24,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:51:24,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:51:24,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:51:24,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:51:24,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:51:24,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:51:24,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:51:24,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:51:24,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:51:24,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:51:24,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:51:24,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:51:24,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:51:24,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:51:24,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:51:24,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:51:24,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:51:24,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:51:24,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:51:24,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:51:24,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:51:24,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:51:24,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:51:24,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:51:24,294 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:51:24,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:51:24,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:51:24,295 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:51:24,295 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:51:24,296 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:51:24,296 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:51:24,296 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:51:24,296 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:51:24,297 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:51:24,297 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:51:24,297 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:51:24,297 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:51:24,298 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:51:24,298 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:51:24,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:51:24,299 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:51:24,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:51:24,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:51:24,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:51:24,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:51:24,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:51:24,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:51:24,301 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:51:24,301 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:51:24,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:51:24,301 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:51:24,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:51:24,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:51:24,302 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:51:24,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:51:24,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:51:24,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:51:24,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:51:24,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:51:24,304 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:51:24,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:51:24,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:51:24,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:51:24,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:51:24,305 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_fa3d763f-d15d-4eff-ab28-de7e438e2f95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2e467e7f7f6c55f410dad37a6e857e419829655 [2020-11-22 12:51:24,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:51:24,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:51:24,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:51:24,567 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:51:24,568 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:51:24,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound1.c [2020-11-22 12:51:24,638 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan/data/602f1d4fd/90e3ad5bcf43416e90cf6b531758af23/FLAGcf02449eb [2020-11-22 12:51:25,168 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:51:25,168 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound1.c [2020-11-22 12:51:25,176 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan/data/602f1d4fd/90e3ad5bcf43416e90cf6b531758af23/FLAGcf02449eb [2020-11-22 12:51:25,537 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan/data/602f1d4fd/90e3ad5bcf43416e90cf6b531758af23 [2020-11-22 12:51:25,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:51:25,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:51:25,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:51:25,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:51:25,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:51:25,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:51:25" (1/1) ... [2020-11-22 12:51:25,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262acbb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:25, skipping insertion in model container [2020-11-22 12:51:25,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:51:25" (1/1) ... [2020-11-22 12:51:25,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:51:25,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:51:25,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:51:25,877 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:51:25,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:51:25,937 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:51:25,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:25 WrapperNode [2020-11-22 12:51:25,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:51:25,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:51:25,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:51:25,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:51:25,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:25" (1/1) ... [2020-11-22 12:51:25,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:25" (1/1) ... [2020-11-22 12:51:25,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:51:25,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:51:25,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:51:25,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:51:26,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:25" (1/1) ... [2020-11-22 12:51:26,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:25" (1/1) ... [2020-11-22 12:51:26,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:25" (1/1) ... [2020-11-22 12:51:26,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:25" (1/1) ... [2020-11-22 12:51:26,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:25" (1/1) ... [2020-11-22 12:51:26,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:25" (1/1) ... [2020-11-22 12:51:26,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:25" (1/1) ... [2020-11-22 12:51:26,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:51:26,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:51:26,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:51:26,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:51:26,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/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 12:51:26,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:51:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2020-11-22 12:51:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:51:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:51:26,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:51:26,602 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:51:26,602 INFO L298 CfgBuilder]: Removed 49 assume(true) statements. [2020-11-22 12:51:26,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:51:26 BoogieIcfgContainer [2020-11-22 12:51:26,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:51:26,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:51:26,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:51:26,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:51:26,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:51:25" (1/3) ... [2020-11-22 12:51:26,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d71b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:51:26, skipping insertion in model container [2020-11-22 12:51:26,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:25" (2/3) ... [2020-11-22 12:51:26,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d71b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:51:26, skipping insertion in model container [2020-11-22 12:51:26,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:51:26" (3/3) ... [2020-11-22 12:51:26,614 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound1.c [2020-11-22 12:51:26,625 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:51:26,630 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-11-22 12:51:26,649 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-11-22 12:51:26,671 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:51:26,671 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:51:26,672 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:51:26,672 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:51:26,672 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:51:26,672 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:51:26,673 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:51:26,673 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:51:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-11-22 12:51:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:51:26,693 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:26,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:51:26,695 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:26,701 INFO L82 PathProgramCache]: Analyzing trace with hash 172918978, now seen corresponding path program 1 times [2020-11-22 12:51:26,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:26,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800435700] [2020-11-22 12:51:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:26,921 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 12:51:26,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800435700] [2020-11-22 12:51:26,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:26,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:51:26,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220680689] [2020-11-22 12:51:26,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:51:26,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:26,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:51:26,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:51:26,951 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 4 states. [2020-11-22 12:51:27,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:27,229 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2020-11-22 12:51:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:51:27,233 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-22 12:51:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:27,254 INFO L225 Difference]: With dead ends: 96 [2020-11-22 12:51:27,254 INFO L226 Difference]: Without dead ends: 46 [2020-11-22 12:51:27,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:51:27,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-22 12:51:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-11-22 12:51:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-22 12:51:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-11-22 12:51:27,325 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 5 [2020-11-22 12:51:27,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:27,325 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-11-22 12:51:27,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:51:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-11-22 12:51:27,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 12:51:27,326 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:27,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:51:27,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:51:27,327 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:27,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:27,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1328400347, now seen corresponding path program 1 times [2020-11-22 12:51:27,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:27,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278992505] [2020-11-22 12:51:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:27,366 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:51:27,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255754854] [2020-11-22 12:51:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/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 12:51:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:27,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-22 12:51:27,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:51:27,501 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 12:51:27,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:51:27,518 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:51:27,541 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 12:51:27,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278992505] [2020-11-22 12:51:27,542 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:51:27,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255754854] [2020-11-22 12:51:27,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:27,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 12:51:27,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541409075] [2020-11-22 12:51:27,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:51:27,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:27,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:51:27,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:51:27,545 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 5 states. [2020-11-22 12:51:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:27,787 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-11-22 12:51:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:51:27,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-22 12:51:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:27,790 INFO L225 Difference]: With dead ends: 85 [2020-11-22 12:51:27,790 INFO L226 Difference]: Without dead ends: 83 [2020-11-22 12:51:27,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 12:51:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-22 12:51:27,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 48. [2020-11-22 12:51:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-22 12:51:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-11-22 12:51:27,818 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 7 [2020-11-22 12:51:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:27,819 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-11-22 12:51:27,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:51:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-11-22 12:51:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:51:27,822 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:27,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:51:28,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-22 12:51:28,024 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:28,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:28,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1768492663, now seen corresponding path program 1 times [2020-11-22 12:51:28,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:28,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852919908] [2020-11-22 12:51:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:28,039 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:51:28,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364471389] [2020-11-22 12:51:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/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 12:51:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:28,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 12:51:28,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:51:28,117 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 12:51:28,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:51:28,129 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 12:51:28,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852919908] [2020-11-22 12:51:28,132 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:51:28,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364471389] [2020-11-22 12:51:28,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:28,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-22 12:51:28,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167479391] [2020-11-22 12:51:28,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:51:28,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:28,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:51:28,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:51:28,136 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 4 states. [2020-11-22 12:51:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:28,170 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-11-22 12:51:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:51:28,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-22 12:51:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:28,172 INFO L225 Difference]: With dead ends: 70 [2020-11-22 12:51:28,172 INFO L226 Difference]: Without dead ends: 48 [2020-11-22 12:51:28,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:51:28,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-22 12:51:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-11-22 12:51:28,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-22 12:51:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-11-22 12:51:28,182 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 8 [2020-11-22 12:51:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:28,183 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-11-22 12:51:28,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:51:28,183 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-11-22 12:51:28,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 12:51:28,184 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:28,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:51:28,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:51:28,407 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:28,408 INFO L82 PathProgramCache]: Analyzing trace with hash -987259832, now seen corresponding path program 1 times [2020-11-22 12:51:28,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:28,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776190043] [2020-11-22 12:51:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:28,438 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:51:28,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636458417] [2020-11-22 12:51:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/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 12:51:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:28,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-22 12:51:28,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:51:28,542 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 12:51:28,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:51:28,552 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:51:28,568 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 12:51:28,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776190043] [2020-11-22 12:51:28,568 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:51:28,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636458417] [2020-11-22 12:51:28,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:28,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 12:51:28,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278803645] [2020-11-22 12:51:28,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:51:28,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:28,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:51:28,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:51:28,571 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 5 states. [2020-11-22 12:51:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:28,908 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-11-22 12:51:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:51:28,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-22 12:51:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:28,910 INFO L225 Difference]: With dead ends: 83 [2020-11-22 12:51:28,910 INFO L226 Difference]: Without dead ends: 79 [2020-11-22 12:51:28,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 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 12:51:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-22 12:51:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2020-11-22 12:51:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-22 12:51:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-11-22 12:51:28,931 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 9 [2020-11-22 12:51:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:28,932 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-11-22 12:51:28,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:51:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-11-22 12:51:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 12:51:28,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:28,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:51:29,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:51:29,147 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:29,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash 431260971, now seen corresponding path program 1 times [2020-11-22 12:51:29,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:29,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121195977] [2020-11-22 12:51:29,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:29,162 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:51:29,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804422848] [2020-11-22 12:51:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/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 12:51:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:29,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-22 12:51:29,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:51:29,260 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 12:51:29,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:51:29,272 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:51:29,287 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 12:51:29,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121195977] [2020-11-22 12:51:29,288 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:51:29,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804422848] [2020-11-22 12:51:29,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:29,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 12:51:29,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386296124] [2020-11-22 12:51:29,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:51:29,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:29,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:51:29,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:51:29,290 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 5 states. [2020-11-22 12:51:29,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:29,954 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-11-22 12:51:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:51:29,954 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-22 12:51:29,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:29,956 INFO L225 Difference]: With dead ends: 118 [2020-11-22 12:51:29,956 INFO L226 Difference]: Without dead ends: 92 [2020-11-22 12:51:29,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 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 12:51:29,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-22 12:51:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2020-11-22 12:51:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-22 12:51:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-11-22 12:51:29,980 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 11 [2020-11-22 12:51:29,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:29,986 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-11-22 12:51:29,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:51:29,987 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-11-22 12:51:29,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 12:51:29,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:29,988 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:51:30,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:51:30,211 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:30,211 INFO L82 PathProgramCache]: Analyzing trace with hash 589658365, now seen corresponding path program 1 times [2020-11-22 12:51:30,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:30,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385856502] [2020-11-22 12:51:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:30,231 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:51:30,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147419094] [2020-11-22 12:51:30,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan/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 [2020-11-22 12:51:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:30,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 12:51:30,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:51:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:51:30,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:51:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:51:30,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385856502] [2020-11-22 12:51:30,337 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:51:30,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147419094] [2020-11-22 12:51:30,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2096955540] [2020-11-22 12:51:30,363 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-22 12:51:30,363 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:51:30,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:51:30,376 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:51:30,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:51:31,325 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:51:31,499 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-11-22 12:51:31,712 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-11-22 12:51:31,998 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-11-22 12:51:32,738 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2020-11-22 12:51:33,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:51:33,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 8 [2020-11-22 12:51:33,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192271256] [2020-11-22 12:51:33,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:51:33,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:33,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:51:33,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-22 12:51:33,458 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-11-22 12:51:33,861 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-11-22 12:51:33,995 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-11-22 12:51:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:34,343 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2020-11-22 12:51:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 12:51:34,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-11-22 12:51:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:34,345 INFO L225 Difference]: With dead ends: 109 [2020-11-22 12:51:34,345 INFO L226 Difference]: Without dead ends: 69 [2020-11-22 12:51:34,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-22 12:51:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-22 12:51:34,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-11-22 12:51:34,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-22 12:51:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-11-22 12:51:34,358 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 19 [2020-11-22 12:51:34,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:34,364 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-11-22 12:51:34,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:51:34,364 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-11-22 12:51:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-22 12:51:34,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:34,368 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:51:34,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-22 12:51:34,591 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:34,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1098770591, now seen corresponding path program 1 times [2020-11-22 12:51:34,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:34,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807386642] [2020-11-22 12:51:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:34,602 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:51:34,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862507612] [2020-11-22 12:51:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan/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 [2020-11-22 12:51:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:51:34,678 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:51:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:51:34,698 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:51:34,734 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:51:34,735 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:51:34,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-22 12:51:35,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:51:35 BoogieIcfgContainer [2020-11-22 12:51:35,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:51:35,006 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:51:35,006 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:51:35,006 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:51:35,006 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:51:26" (3/4) ... [2020-11-22 12:51:35,008 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 12:51:35,069 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fa3d763f-d15d-4eff-ab28-de7e438e2f95/bin/utaipan/witness.graphml [2020-11-22 12:51:35,076 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:51:35,077 INFO L168 Benchmark]: Toolchain (without parser) took 9535.49 ms. Allocated memory was 146.8 MB in the beginning and 176.2 MB in the end (delta: 29.4 MB). Free memory was 120.0 MB in the beginning and 119.6 MB in the end (delta: 379.4 kB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:51:35,078 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory is still 46.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:51:35,078 INFO L168 Benchmark]: CACSL2BoogieTranslator took 395.50 ms. Allocated memory is still 146.8 MB. Free memory was 119.7 MB in the beginning and 123.6 MB in the end (delta: -3.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:51:35,079 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.47 ms. Allocated memory is still 146.8 MB. Free memory was 123.6 MB in the beginning and 121.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:51:35,081 INFO L168 Benchmark]: Boogie Preprocessor took 25.49 ms. Allocated memory is still 146.8 MB. Free memory was 121.6 MB in the beginning and 120.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:51:35,083 INFO L168 Benchmark]: RCFGBuilder took 582.33 ms. Allocated memory is still 146.8 MB. Free memory was 120.4 MB in the beginning and 100.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-22 12:51:35,084 INFO L168 Benchmark]: TraceAbstraction took 8398.47 ms. Allocated memory was 146.8 MB in the beginning and 176.2 MB in the end (delta: 29.4 MB). Free memory was 100.5 MB in the beginning and 122.7 MB in the end (delta: -22.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2020-11-22 12:51:35,086 INFO L168 Benchmark]: Witness Printer took 70.56 ms. Allocated memory is still 176.2 MB. Free memory was 122.7 MB in the beginning and 119.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:51:35,088 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory is still 46.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 395.50 ms. Allocated memory is still 146.8 MB. Free memory was 119.7 MB in the beginning and 123.6 MB in the end (delta: -3.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.47 ms. Allocated memory is still 146.8 MB. Free memory was 123.6 MB in the beginning and 121.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.49 ms. Allocated memory is still 146.8 MB. Free memory was 121.6 MB in the beginning and 120.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 582.33 ms. Allocated memory is still 146.8 MB. Free memory was 120.4 MB in the beginning and 100.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8398.47 ms. Allocated memory was 146.8 MB in the beginning and 176.2 MB in the end (delta: 29.4 MB). Free memory was 100.5 MB in the beginning and 122.7 MB in the end (delta: -22.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * Witness Printer took 70.56 ms. Allocated memory is still 176.2 MB. Free memory was 122.7 MB in the beginning and 119.6 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: - CounterExampleResult [Line: 8]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] int counter = 0; [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_unsigned_short() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<1 [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND FALSE !(counter++<1) [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND TRUE !(cond) VAL [counter=2] [L8] __assert_fail("0", "cohencu-ll.c", 8, "reach_error") VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 49 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.2s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 184 SDtfs, 221 SDslu, 321 SDs, 0 SdLazy, 333 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 83 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 5238 SizeOfPredicates, 14 NumberOfNonLiveVariables, 354 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 11 InterpolantComputations, 9 PerfectInterpolantSequences, 8/10 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: OVERALL_TIME[ms]: 962, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 15, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 28, TOOLS_POST_TIME[ms]: 509, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 28, TOOLS_QUANTIFIERELIM_TIME[ms]: 491, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 406, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 45, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME[ms]: 295, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME[ms]: 0, DOMAIN_ISSUBSETEQ_APPLICATIONS: 1, DOMAIN_ISSUBSETEQ_TIME[ms]: 6, DOMAIN_ISBOTTOM_APPLICATIONS: 15, DOMAIN_ISBOTTOM_TIME[ms]: 100, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 57, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 57, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 1, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 12, DAG_COMPRESSION_PROCESSED_NODES: 183, DAG_COMPRESSION_RETAINED_NODES: 50, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...