./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI --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 1f48197f615b5bb3f646b16cb6d7957d384b7e1b ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-7b2dab5 [2021-10-11 02:22:59,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:22:59,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:22:59,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:22:59,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:22:59,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:22:59,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:22:59,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:22:59,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:22:59,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:22:59,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:22:59,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:22:59,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:22:59,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:22:59,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:22:59,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:22:59,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:22:59,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:22:59,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:22:59,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:22:59,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:22:59,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:22:59,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:22:59,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:22:59,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:22:59,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:22:59,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:22:59,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:22:59,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:22:59,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:22:59,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:22:59,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:22:59,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:22:59,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:22:59,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:22:59,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:22:59,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:22:59,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:22:59,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:22:59,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:22:59,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:22:59,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:22:59,394 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:22:59,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:22:59,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:22:59,396 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:22:59,396 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:22:59,396 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:22:59,397 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:22:59,397 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:22:59,397 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:22:59,397 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:22:59,399 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:22:59,399 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:22:59,399 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:22:59,400 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:22:59,400 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:22:59,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:22:59,401 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:22:59,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:22:59,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:22:59,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:22:59,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:22:59,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:22:59,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:22:59,403 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:22:59,403 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:22:59,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:22:59,404 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:22:59,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:22:59,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:22:59,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:22:59,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:22:59,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:22:59,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:22:59,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:22:59,408 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:22:59,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:22:59,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:22:59,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:22:59,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:22:59,409 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_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f48197f615b5bb3f646b16cb6d7957d384b7e1b [2021-10-11 02:22:59,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:22:59,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:22:59,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:22:59,777 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:22:59,784 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:22:59,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c [2021-10-11 02:22:59,867 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/data/ae56ab200/77b022be3b684c369f8d4c845eeb8ecf/FLAG99ca47f0b [2021-10-11 02:23:00,345 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:00,345 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c [2021-10-11 02:23:00,361 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/data/ae56ab200/77b022be3b684c369f8d4c845eeb8ecf/FLAG99ca47f0b [2021-10-11 02:23:00,725 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/data/ae56ab200/77b022be3b684c369f8d4c845eeb8ecf [2021-10-11 02:23:00,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:00,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:00,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:00,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:00,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:00,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:00" (1/1) ... [2021-10-11 02:23:00,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46b669c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:00, skipping insertion in model container [2021-10-11 02:23:00,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:00" (1/1) ... [2021-10-11 02:23:00,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:00,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:00,958 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c[490,503] [2021-10-11 02:23:00,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:01,003 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:01,016 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound1.c[490,503] [2021-10-11 02:23:01,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:01,046 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:01,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:01 WrapperNode [2021-10-11 02:23:01,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:01,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:01,052 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:01,052 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:01,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:01" (1/1) ... [2021-10-11 02:23:01,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:01" (1/1) ... [2021-10-11 02:23:01,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:01,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:01,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:01,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:01,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:01" (1/1) ... [2021-10-11 02:23:01,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:01" (1/1) ... [2021-10-11 02:23:01,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:01" (1/1) ... [2021-10-11 02:23:01,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:01" (1/1) ... [2021-10-11 02:23:01,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:01" (1/1) ... [2021-10-11 02:23:01,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:01" (1/1) ... [2021-10-11 02:23:01,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:01" (1/1) ... [2021-10-11 02:23:01,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:01,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:01,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:01,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:01,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:01" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:23:01,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:23:01,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:23:01,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:01,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:01,759 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:01,760 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-11 02:23:01,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:01 BoogieIcfgContainer [2021-10-11 02:23:01,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:01,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:01,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:01,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:01,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:00" (1/3) ... [2021-10-11 02:23:01,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b710c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:01, skipping insertion in model container [2021-10-11 02:23:01,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:01" (2/3) ... [2021-10-11 02:23:01,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b710c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:01, skipping insertion in model container [2021-10-11 02:23:01,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:01" (3/3) ... [2021-10-11 02:23:01,771 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound1.c [2021-10-11 02:23:01,786 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:01,790 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2021-10-11 02:23:01,802 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-11 02:23:01,823 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:01,823 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:23:01,823 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:01,823 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:01,824 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:01,824 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:01,824 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:01,824 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-10-11 02:23:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:23:01,843 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:01,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:23:01,844 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:01,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:01,850 INFO L82 PathProgramCache]: Analyzing trace with hash 160510030, now seen corresponding path program 1 times [2021-10-11 02:23:01,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:01,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575064515] [2021-10-11 02:23:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:02,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575064515] [2021-10-11 02:23:02,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:02,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:23:02,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693704464] [2021-10-11 02:23:02,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:23:02,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:02,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:23:02,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:23:02,031 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2021-10-11 02:23:02,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:02,051 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2021-10-11 02:23:02,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:23:02,053 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2021-10-11 02:23:02,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:02,062 INFO L225 Difference]: With dead ends: 65 [2021-10-11 02:23:02,062 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:23:02,065 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 [2021-10-11 02:23:02,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:23:02,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-11 02:23:02,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:23:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-10-11 02:23:02,102 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 5 [2021-10-11 02:23:02,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:02,102 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-10-11 02:23:02,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:23:02,102 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-10-11 02:23:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:23:02,103 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:02,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:23:02,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:23:02,104 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:02,105 INFO L82 PathProgramCache]: Analyzing trace with hash 592212585, now seen corresponding path program 1 times [2021-10-11 02:23:02,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:02,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971915276] [2021-10-11 02:23:02,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:02,129 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:23:02,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921406856] [2021-10-11 02:23:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:23:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:02,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:23:02,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:02,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:02,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971915276] [2021-10-11 02:23:02,291 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:02,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921406856] [2021-10-11 02:23:02,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:02,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-11 02:23:02,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915930127] [2021-10-11 02:23:02,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:23:02,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:02,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:23:02,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:02,295 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2021-10-11 02:23:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:02,320 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-10-11 02:23:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:23:02,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-10-11 02:23:02,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:02,321 INFO L225 Difference]: With dead ends: 37 [2021-10-11 02:23:02,322 INFO L226 Difference]: Without dead ends: 33 [2021-10-11 02:23:02,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:02,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-11 02:23:02,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-11 02:23:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:23:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-10-11 02:23:02,329 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2021-10-11 02:23:02,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:02,329 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-10-11 02:23:02,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:23:02,329 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-10-11 02:23:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:23:02,330 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:02,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:02,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 02:23:02,556 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:02,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1177973352, now seen corresponding path program 1 times [2021-10-11 02:23:02,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:02,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640230205] [2021-10-11 02:23:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:02,577 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:23:02,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022650428] [2021-10-11 02:23:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:23:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:02,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:23:02,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:02,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:02,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640230205] [2021-10-11 02:23:02,712 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:02,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022650428] [2021-10-11 02:23:02,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:02,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-11 02:23:02,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288858711] [2021-10-11 02:23:02,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:02,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:02,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:02,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:02,715 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2021-10-11 02:23:02,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:02,786 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-10-11 02:23:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:02,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-10-11 02:23:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:02,792 INFO L225 Difference]: With dead ends: 61 [2021-10-11 02:23:02,792 INFO L226 Difference]: Without dead ends: 57 [2021-10-11 02:23:02,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-11 02:23:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2021-10-11 02:23:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-11 02:23:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-10-11 02:23:02,799 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 7 [2021-10-11 02:23:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:02,801 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-10-11 02:23:02,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-10-11 02:23:02,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:23:02,802 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:02,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:03,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:03,016 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:03,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:03,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1175714080, now seen corresponding path program 1 times [2021-10-11 02:23:03,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:03,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994222150] [2021-10-11 02:23:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:03,039 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:23:03,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433675645] [2021-10-11 02:23:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:23:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:03,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 02:23:03,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:03,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:03,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:03,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994222150] [2021-10-11 02:23:03,252 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:03,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433675645] [2021-10-11 02:23:03,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:03,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-11 02:23:03,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712344506] [2021-10-11 02:23:03,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:23:03,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:03,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:23:03,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:23:03,255 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2021-10-11 02:23:03,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:03,287 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-10-11 02:23:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:23:03,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-10-11 02:23:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:03,288 INFO L225 Difference]: With dead ends: 44 [2021-10-11 02:23:03,288 INFO L226 Difference]: Without dead ends: 14 [2021-10-11 02:23:03,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:23:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-11 02:23:03,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-11 02:23:03,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-11 02:23:03,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-11 02:23:03,293 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-10-11 02:23:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:03,293 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-11 02:23:03,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:23:03,293 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-11 02:23:03,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:23:03,294 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:03,294 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:03,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:03,500 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2121654826, now seen corresponding path program 1 times [2021-10-11 02:23:03,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:03,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452131943] [2021-10-11 02:23:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:03,518 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:23:03,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719127218] [2021-10-11 02:23:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:23:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:03,583 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:03,600 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:03,646 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:23:03,646 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:23:03,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:03,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:23:03 BoogieIcfgContainer [2021-10-11 02:23:03,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:23:03,905 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:23:03,905 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:23:03,905 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:23:03,905 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:01" (3/4) ... [2021-10-11 02:23:03,907 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:23:03,964 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cfe06f-e76b-4a86-8cb3-8fa01b744b11/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:23:03,964 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:23:03,966 INFO L168 Benchmark]: Toolchain (without parser) took 3236.48 ms. Allocated memory was 77.6 MB in the beginning and 113.2 MB in the end (delta: 35.7 MB). Free memory was 41.1 MB in the beginning and 89.8 MB in the end (delta: -48.7 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:03,967 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 77.6 MB. Free memory was 57.8 MB in the beginning and 57.7 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:03,968 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.69 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 40.9 MB in the beginning and 70.0 MB in the end (delta: -29.1 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:03,968 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.73 ms. Allocated memory is still 94.4 MB. Free memory was 70.0 MB in the beginning and 68.3 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:03,969 INFO L168 Benchmark]: Boogie Preprocessor took 32.10 ms. Allocated memory is still 94.4 MB. Free memory was 68.3 MB in the beginning and 67.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:03,970 INFO L168 Benchmark]: RCFGBuilder took 627.39 ms. Allocated memory is still 94.4 MB. Free memory was 66.8 MB in the beginning and 65.9 MB in the end (delta: 949.0 kB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:03,970 INFO L168 Benchmark]: TraceAbstraction took 2140.68 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 65.5 MB in the beginning and 53.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:03,971 INFO L168 Benchmark]: Witness Printer took 59.48 ms. Allocated memory is still 113.2 MB. Free memory was 53.8 MB in the beginning and 89.8 MB in the end (delta: -36.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:03,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 77.6 MB. Free memory was 57.8 MB in the beginning and 57.7 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 319.69 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 40.9 MB in the beginning and 70.0 MB in the end (delta: -29.1 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.73 ms. Allocated memory is still 94.4 MB. Free memory was 70.0 MB in the beginning and 68.3 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.10 ms. Allocated memory is still 94.4 MB. Free memory was 68.3 MB in the beginning and 67.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 627.39 ms. Allocated memory is still 94.4 MB. Free memory was 66.8 MB in the beginning and 65.9 MB in the end (delta: 949.0 kB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2140.68 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 65.5 MB in the beginning and 53.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 16.1 GB. * Witness Printer took 59.48 ms. Allocated memory is still 113.2 MB. Free memory was 53.8 MB in the beginning and 89.8 MB in the end (delta: -36.0 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: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<1 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND FALSE !(counter++<1) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND FALSE !(counter++<1) [L11] COND TRUE !(cond) VAL [counter=3] [L13] reach_error() VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 110 SDtfs, 41 SDslu, 98 SDs, 0 SdLazy, 34 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 23 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 46 ConstructedInterpolants, 0 QuantifiedInterpolants, 650 SizeOfPredicates, 4 NumberOfNonLiveVariables, 223 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 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...