./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound20.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_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/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 99c616c93774d1cd64262739d28fe5731b5897c8 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 12:48:54,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:48:54,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:48:54,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:48:54,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:48:54,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:48:54,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:48:54,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:48:54,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:48:54,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:48:54,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:48:54,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:48:54,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:48:54,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:48:54,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:48:54,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:48:54,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:48:54,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:48:54,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:48:54,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:48:54,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:48:54,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:48:54,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:48:54,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:48:54,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:48:54,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:48:54,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:48:54,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:48:54,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:48:54,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:48:54,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:48:54,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:48:54,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:48:54,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:48:54,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:48:54,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:48:54,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:48:54,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:48:54,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:48:54,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:48:54,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:48:54,467 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:48:54,523 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:48:54,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:48:54,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:48:54,525 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:48:54,526 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:48:54,526 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:48:54,526 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:48:54,526 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:48:54,527 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:48:54,527 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:48:54,528 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:48:54,529 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:48:54,529 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:48:54,530 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:48:54,530 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:48:54,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:48:54,531 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:48:54,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:48:54,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:48:54,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:48:54,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:48:54,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:48:54,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:48:54,533 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:48:54,534 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:48:54,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:48:54,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:48:54,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:48:54,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:48:54,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:48:54,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:48:54,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:48:54,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:48:54,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:48:54,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:48:54,537 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:48:54,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:48:54,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:48:54,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:48:54,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:48:54,539 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_283e940d-9304-4902-8708-6b468a37048b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c616c93774d1cd64262739d28fe5731b5897c8 [2020-11-22 12:48:54,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:48:54,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:48:54,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:48:54,960 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:48:54,961 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:48:54,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound20.c [2020-11-22 12:48:55,061 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/data/91a258512/e6232cbfde5c4b4a80b863b018c93e25/FLAG50307c9c7 [2020-11-22 12:48:55,712 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:48:55,712 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound20.c [2020-11-22 12:48:55,720 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/data/91a258512/e6232cbfde5c4b4a80b863b018c93e25/FLAG50307c9c7 [2020-11-22 12:48:56,058 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/data/91a258512/e6232cbfde5c4b4a80b863b018c93e25 [2020-11-22 12:48:56,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:48:56,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:48:56,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:48:56,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:48:56,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:48:56,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:48:56" (1/1) ... [2020-11-22 12:48:56,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50bd42c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:56, skipping insertion in model container [2020-11-22 12:48:56,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:48:56" (1/1) ... [2020-11-22 12:48:56,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:48:56,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:48:56,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:48:56,413 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:48:56,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:48:56,455 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:48:56,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:56 WrapperNode [2020-11-22 12:48:56,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:48:56,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:48:56,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:48:56,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:48:56,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:56" (1/1) ... [2020-11-22 12:48:56,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:56" (1/1) ... [2020-11-22 12:48:56,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:48:56,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:48:56,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:48:56,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:48:56,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:56" (1/1) ... [2020-11-22 12:48:56,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:56" (1/1) ... [2020-11-22 12:48:56,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:56" (1/1) ... [2020-11-22 12:48:56,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:56" (1/1) ... [2020-11-22 12:48:56,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:56" (1/1) ... [2020-11-22 12:48:56,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:56" (1/1) ... [2020-11-22 12:48:56,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:56" (1/1) ... [2020-11-22 12:48:56,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:48:56,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:48:56,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:48:56,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:48:56,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/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 12:48:56,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:48:56,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:48:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:48:56,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:48:57,309 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:48:57,309 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-22 12:48:57,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:48:57 BoogieIcfgContainer [2020-11-22 12:48:57,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:48:57,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:48:57,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:48:57,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:48:57,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:48:56" (1/3) ... [2020-11-22 12:48:57,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3810d84b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:48:57, skipping insertion in model container [2020-11-22 12:48:57,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:56" (2/3) ... [2020-11-22 12:48:57,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3810d84b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:48:57, skipping insertion in model container [2020-11-22 12:48:57,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:48:57" (3/3) ... [2020-11-22 12:48:57,321 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound20.c [2020-11-22 12:48:57,334 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:48:57,339 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-22 12:48:57,353 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-22 12:48:57,382 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:48:57,382 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:48:57,383 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:48:57,383 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:48:57,383 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:48:57,383 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:48:57,383 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:48:57,383 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:48:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-22 12:48:57,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:48:57,405 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:57,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:48:57,406 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:57,415 INFO L82 PathProgramCache]: Analyzing trace with hash 80563898, now seen corresponding path program 1 times [2020-11-22 12:48:57,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:57,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711718188] [2020-11-22 12:48:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:57,614 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 12:48:57,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711718188] [2020-11-22 12:48:57,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:57,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:48:57,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094519897] [2020-11-22 12:48:57,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 12:48:57,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:57,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 12:48:57,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:48:57,646 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-22 12:48:57,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:57,665 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2020-11-22 12:48:57,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:48:57,666 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-22 12:48:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:57,678 INFO L225 Difference]: With dead ends: 25 [2020-11-22 12:48:57,678 INFO L226 Difference]: Without dead ends: 11 [2020-11-22 12:48:57,692 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 [2020-11-22 12:48:57,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-22 12:48:57,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-22 12:48:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-22 12:48:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-22 12:48:57,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2020-11-22 12:48:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:57,729 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-22 12:48:57,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 12:48:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-22 12:48:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:48:57,730 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:57,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:48:57,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:48:57,731 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:57,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:57,732 INFO L82 PathProgramCache]: Analyzing trace with hash 79643357, now seen corresponding path program 1 times [2020-11-22 12:48:57,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:57,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452711547] [2020-11-22 12:48:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:57,772 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:48:57,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3234452] [2020-11-22 12:48:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/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 12:48:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:57,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-22 12:48:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:48:57,947 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 12:48:57,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:48:57,975 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:48:58,003 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 12:48:58,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452711547] [2020-11-22 12:48:58,004 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:48:58,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3234452] [2020-11-22 12:48:58,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:58,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 12:48:58,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915198832] [2020-11-22 12:48:58,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:48:58,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:58,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:48:58,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:48:58,007 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-11-22 12:49:00,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:00,275 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-11-22 12:49:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 12:49:00,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-22 12:49:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:00,278 INFO L225 Difference]: With dead ends: 33 [2020-11-22 12:49:00,278 INFO L226 Difference]: Without dead ends: 26 [2020-11-22 12:49:00,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:49:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-22 12:49:00,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2020-11-22 12:49:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-22 12:49:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-22 12:49:00,286 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 5 [2020-11-22 12:49:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:00,287 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-22 12:49:00,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:49:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-22 12:49:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 12:49:00,288 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:00,288 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:00,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-22 12:49:00,502 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:00,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:00,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1161392796, now seen corresponding path program 1 times [2020-11-22 12:49:00,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:00,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18942797] [2020-11-22 12:49:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:00,521 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:49:00,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522542770] [2020-11-22 12:49:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:49:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:00,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 12:49:00,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:00,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:00,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18942797] [2020-11-22 12:49:00,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:00,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522542770] [2020-11-22 12:49:00,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1875539232] [2020-11-22 12:49:00,685 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:49:00,685 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:49:00,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:49:00,695 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:49:00,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:49:01,090 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-11-22 12:49:01,647 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:49:01,990 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-11-22 12:49:02,155 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-11-22 12:49:02,361 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-11-22 12:49:02,664 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-11-22 12:49:02,950 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-22 12:49:03,177 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-11-22 12:49:03,877 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-11-22 12:49:03,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:03,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:49:03,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-11-22 12:49:03,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310025738] [2020-11-22 12:49:03,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 12:49:03,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:03,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 12:49:03,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-22 12:49:03,882 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 8 states. [2020-11-22 12:49:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:04,023 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-11-22 12:49:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-22 12:49:04,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-11-22 12:49:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:04,025 INFO L225 Difference]: With dead ends: 39 [2020-11-22 12:49:04,025 INFO L226 Difference]: Without dead ends: 35 [2020-11-22 12:49:04,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-22 12:49:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-22 12:49:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2020-11-22 12:49:04,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 12:49:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-22 12:49:04,031 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2020-11-22 12:49:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:04,031 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-22 12:49:04,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 12:49:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-22 12:49:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 12:49:04,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:04,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-22 12:49:04,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:49:04,244 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:04,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:04,245 INFO L82 PathProgramCache]: Analyzing trace with hash 633174813, now seen corresponding path program 1 times [2020-11-22 12:49:04,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:04,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840796464] [2020-11-22 12:49:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:04,263 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:49:04,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311669203] [2020-11-22 12:49:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:49:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:04,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-22 12:49:04,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:04,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:05,770 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-11-22 12:49:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:05,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840796464] [2020-11-22 12:49:05,956 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:05,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311669203] [2020-11-22 12:49:05,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-22 12:49:05,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2020-11-22 12:49:05,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25313307] [2020-11-22 12:49:05,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 12:49:05,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:05,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 12:49:05,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-11-22 12:49:05,959 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-11-22 12:49:07,024 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-22 12:49:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:07,168 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-11-22 12:49:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 12:49:07,172 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-11-22 12:49:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:07,173 INFO L225 Difference]: With dead ends: 29 [2020-11-22 12:49:07,173 INFO L226 Difference]: Without dead ends: 25 [2020-11-22 12:49:07,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-11-22 12:49:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-22 12:49:07,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-22 12:49:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 12:49:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-11-22 12:49:07,180 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2020-11-22 12:49:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:07,181 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-11-22 12:49:07,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 12:49:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-11-22 12:49:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 12:49:07,185 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:07,185 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2020-11-22 12:49:07,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-22 12:49:07,405 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:07,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1816000587, now seen corresponding path program 1 times [2020-11-22 12:49:07,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:07,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687348983] [2020-11-22 12:49:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:07,421 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:49:07,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966024141] [2020-11-22 12:49:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:49:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:49:07,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-22 12:49:07,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:07,933 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-11-22 12:49:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:08,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:49:08,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687348983] [2020-11-22 12:49:08,368 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:08,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966024141] [2020-11-22 12:49:08,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [619225727] [2020-11-22 12:49:08,372 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 12:49:08,373 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:49:08,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:49:08,374 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:49:08,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:49:08,843 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:49:09,114 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-11-22 12:49:09,328 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-11-22 12:49:09,507 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-11-22 12:49:09,782 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-11-22 12:49:10,061 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-11-22 12:49:10,079 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:10,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:49:10,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-22 12:49:10,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646689779] [2020-11-22 12:49:10,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-22 12:49:10,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:10,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-22 12:49:10,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-11-22 12:49:10,081 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2020-11-22 12:49:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:14,678 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-22 12:49:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 12:49:14,679 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-11-22 12:49:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:14,680 INFO L225 Difference]: With dead ends: 25 [2020-11-22 12:49:14,680 INFO L226 Difference]: Without dead ends: 23 [2020-11-22 12:49:14,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-22 12:49:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-22 12:49:14,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-22 12:49:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 12:49:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-11-22 12:49:14,688 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 13 [2020-11-22 12:49:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:14,689 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-11-22 12:49:14,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-22 12:49:14,689 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-11-22 12:49:14,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-22 12:49:14,694 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:14,694 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2020-11-22 12:49:14,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-22 12:49:14,895 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:14,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:14,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1884262816, now seen corresponding path program 2 times [2020-11-22 12:49:14,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:14,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426319368] [2020-11-22 12:49:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:14,909 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:49:14,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611350864] [2020-11-22 12:49:14,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/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 12:49:15,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-22 12:49:15,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 12:49:15,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-22 12:49:15,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:15,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:15,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426319368] [2020-11-22 12:49:15,170 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:15,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611350864] [2020-11-22 12:49:15,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259793350] [2020-11-22 12:49:15,173 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:49:15,173 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:49:15,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:49:15,174 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:49:15,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:49:15,534 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:49:16,050 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-11-22 12:49:16,206 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-11-22 12:49:16,407 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-11-22 12:49:16,664 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-11-22 12:49:16,865 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-22 12:49:17,118 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-11-22 12:49:17,354 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-11-22 12:49:17,355 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:17,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:49:17,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-22 12:49:17,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206827002] [2020-11-22 12:49:17,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-22 12:49:17,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-22 12:49:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-11-22 12:49:17,358 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-11-22 12:49:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:17,755 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-11-22 12:49:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-22 12:49:17,756 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-11-22 12:49:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:17,757 INFO L225 Difference]: With dead ends: 51 [2020-11-22 12:49:17,757 INFO L226 Difference]: Without dead ends: 47 [2020-11-22 12:49:17,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2020-11-22 12:49:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-22 12:49:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-22 12:49:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-22 12:49:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-11-22 12:49:17,771 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 22 [2020-11-22 12:49:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:17,771 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-11-22 12:49:17,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-22 12:49:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-11-22 12:49:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-22 12:49:17,773 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:17,774 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2020-11-22 12:49:17,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-11-22 12:49:17,994 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:17,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:17,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1170789352, now seen corresponding path program 3 times [2020-11-22 12:49:17,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:17,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678307639] [2020-11-22 12:49:17,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:18,013 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:49:18,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847198980] [2020-11-22 12:49:18,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/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 12:49:18,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-22 12:49:18,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 12:49:18,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-22 12:49:18,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:49:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:18,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:49:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:49:18,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678307639] [2020-11-22 12:49:18,719 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:18,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847198980] [2020-11-22 12:49:18,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1343175676] [2020-11-22 12:49:18,723 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:49:18,724 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:49:18,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:49:18,724 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:49:18,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:49:19,099 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:49:19,343 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-11-22 12:49:19,536 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-11-22 12:49:19,792 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-11-22 12:49:19,975 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-11-22 12:49:20,170 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-22 12:49:20,318 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-11-22 12:49:21,366 WARN L193 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-11-22 12:49:21,367 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:49:21,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:49:21,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-22 12:49:21,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619840878] [2020-11-22 12:49:21,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-22 12:49:21,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:49:21,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-22 12:49:21,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=669, Unknown=0, NotChecked=0, Total=930 [2020-11-22 12:49:21,371 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-11-22 12:49:22,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:49:22,206 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2020-11-22 12:49:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-22 12:49:22,207 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-11-22 12:49:22,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:49:22,208 INFO L225 Difference]: With dead ends: 91 [2020-11-22 12:49:22,208 INFO L226 Difference]: Without dead ends: 87 [2020-11-22 12:49:22,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=690, Invalid=1760, Unknown=0, NotChecked=0, Total=2450 [2020-11-22 12:49:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-22 12:49:22,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-11-22 12:49:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-22 12:49:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-11-22 12:49:22,246 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 46 [2020-11-22 12:49:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:49:22,247 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-11-22 12:49:22,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-22 12:49:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-11-22 12:49:22,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-22 12:49:22,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:49:22,252 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1] [2020-11-22 12:49:22,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-11-22 12:49:22,466 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:49:22,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:49:22,467 INFO L82 PathProgramCache]: Analyzing trace with hash -219061536, now seen corresponding path program 4 times [2020-11-22 12:49:22,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:49:22,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652578468] [2020-11-22 12:49:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:49:22,482 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:49:22,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804309333] [2020-11-22 12:49:22,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/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 [2020-11-22 12:49:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:49:23,717 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:49:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:49:24,485 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:49:24,623 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:49:24,624 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:49:24,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-11-22 12:49:24,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:49:24 BoogieIcfgContainer [2020-11-22 12:49:24,945 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:49:24,946 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:49:24,946 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:49:24,946 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:49:24,946 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:48:57" (3/4) ... [2020-11-22 12:49:24,949 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 12:49:25,111 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_283e940d-9304-4902-8708-6b468a37048b/bin/utaipan/witness.graphml [2020-11-22 12:49:25,111 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:49:25,113 INFO L168 Benchmark]: Toolchain (without parser) took 29043.90 ms. Allocated memory was 94.4 MB in the beginning and 201.3 MB in the end (delta: 107.0 MB). Free memory was 39.6 MB in the beginning and 132.1 MB in the end (delta: -92.5 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:25,113 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 94.4 MB. Free memory was 56.1 MB in the beginning and 56.0 MB in the end (delta: 82.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:49:25,114 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.13 ms. Allocated memory is still 94.4 MB. Free memory was 39.5 MB in the beginning and 72.1 MB in the end (delta: -32.7 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:25,114 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.11 ms. Allocated memory is still 94.4 MB. Free memory was 72.1 MB in the beginning and 70.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:25,115 INFO L168 Benchmark]: Boogie Preprocessor took 25.12 ms. Allocated memory is still 94.4 MB. Free memory was 70.8 MB in the beginning and 69.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:49:25,115 INFO L168 Benchmark]: RCFGBuilder took 778.42 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 52.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:25,116 INFO L168 Benchmark]: TraceAbstraction took 27631.43 ms. Allocated memory was 94.4 MB in the beginning and 201.3 MB in the end (delta: 107.0 MB). Free memory was 51.6 MB in the beginning and 140.7 MB in the end (delta: -89.1 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:25,117 INFO L168 Benchmark]: Witness Printer took 166.02 ms. Allocated memory is still 201.3 MB. Free memory was 140.7 MB in the beginning and 132.1 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:49:25,119 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 94.4 MB. Free memory was 56.1 MB in the beginning and 56.0 MB in the end (delta: 82.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 383.13 ms. Allocated memory is still 94.4 MB. Free memory was 39.5 MB in the beginning and 72.1 MB in the end (delta: -32.7 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.11 ms. Allocated memory is still 94.4 MB. Free memory was 72.1 MB in the beginning and 70.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.12 ms. Allocated memory is still 94.4 MB. Free memory was 70.8 MB in the beginning and 69.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 778.42 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 52.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 27631.43 ms. Allocated memory was 94.4 MB in the beginning and 201.3 MB in the end (delta: 107.0 MB). Free memory was 51.6 MB in the beginning and 140.7 MB in the end (delta: -89.1 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. * Witness Printer took 166.02 ms. Allocated memory is still 201.3 MB. Free memory was 140.7 MB in the beginning and 132.1 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int counter = 0; [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [counter=0] [L31] EXPR counter++ VAL [counter=1] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=1] [L31] EXPR counter++ VAL [counter=2] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=2] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=2] [L31] EXPR counter++ VAL [counter=3] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=3] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=3] [L31] EXPR counter++ VAL [counter=4] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=4] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=4] [L31] EXPR counter++ VAL [counter=5] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=5] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=5] [L31] EXPR counter++ VAL [counter=6] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=6] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=6] [L31] EXPR counter++ VAL [counter=7] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=7] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=7] [L31] EXPR counter++ VAL [counter=8] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=8] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=8] [L31] EXPR counter++ VAL [counter=9] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=9] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=9] [L31] EXPR counter++ VAL [counter=10] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=10] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=10] [L31] EXPR counter++ VAL [counter=11] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=11] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=11] [L31] EXPR counter++ VAL [counter=12] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=12] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=12] [L31] EXPR counter++ VAL [counter=13] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=13] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=13] [L31] EXPR counter++ VAL [counter=14] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=14] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=14] [L31] EXPR counter++ VAL [counter=15] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=15] [L35] COND FALSE !(!(x <= X)) [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ [L45] x++ VAL [counter=15] [L31] EXPR counter++ VAL [counter=16] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=16] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=16] [L31] EXPR counter++ VAL [counter=17] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=17] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=17] [L31] EXPR counter++ VAL [counter=18] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=18] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=18] [L31] EXPR counter++ VAL [counter=19] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=19] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=19] [L31] EXPR counter++ VAL [counter=20] [L31] COND TRUE counter++<20 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=20] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=20] [L31] EXPR counter++ VAL [counter=21] [L31] COND FALSE !(counter++<20) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) VAL [counter=21] [L7] __assert_fail("0", "bresenham-ll.c", 7, "reach_error") VAL [counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 27.4s, OverallIterations: 8, TraceHistogramMax: 21, AutomataDifference: 9.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 60 SDtfs, 88 SDslu, 217 SDs, 0 SdLazy, 191 SolverSat, 50 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 7.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 337 GetRequests, 206 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 12.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=7, 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, 18 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 199 NumberOfCodeBlocks, 199 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 25495 SizeOfPredicates, 59 NumberOfNonLiveVariables, 688 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 13/496 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...